Illumos #3085: zfs diff panics, then panics in a loop on booting

[zfs.git] / configure

diff --git a/configure b/configure
index 5a52d94..83fc2a8 100755 (executable)
--- a/configure
+++ b/configure
@@ -986,6 +986,7 @@ with_linux
 with_linux_obj
 with_spl
 with_spl_obj
+with_spl_timeout
 with_udevdir
 with_udevruledir
 with_blkid
@@ -1660,6 +1661,7 @@ Optional Packages:
   --with-linux-obj=PATH   Path to kernel build objects
   --with-spl=PATH         Path to spl source
   --with-spl-obj=PATH     Path to spl build objects
+  --with-spl-timeout=SECS Wait SECS for symvers file to appear [default=0]
   --with-udevdir=DIR      install udev helpers [EPREFIX/lib/udev]
   --with-udevruledir=DIR  install udev rules [UDEVDIR/rules.d]
   --with-blkid            support blkid caching [default=check]
@@ -4842,13 +4844,13 @@ if test "${lt_cv_nm_interface+set}" = set; then
 else
   lt_cv_nm_interface="BSD nm"
   echo "int some_variable = 0;" > conftest.$ac_ext
-  (eval echo "\"\$as_me:4845: $ac_compile\"" >&5)
+  (eval echo "\"\$as_me:4847: $ac_compile\"" >&5)
   (eval "$ac_compile" 2>conftest.err)
   cat conftest.err >&5
-  (eval echo "\"\$as_me:4848: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
+  (eval echo "\"\$as_me:4850: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
   (eval "$NM \"conftest.$ac_objext\"" 2>conftest.err > conftest.out)
   cat conftest.err >&5
-  (eval echo "\"\$as_me:4851: output\"" >&5)
+  (eval echo "\"\$as_me:4853: output\"" >&5)
   cat conftest.out >&5
   if $GREP 'External.*some_variable' conftest.out > /dev/null; then
     lt_cv_nm_interface="MS dumpbin"
@@ -6054,7 +6056,7 @@ ia64-*-hpux*)
   ;;
 *-*-irix6*)
   # Find out which ABI we are using.
-  echo '#line 6057 "configure"' > conftest.$ac_ext
+  echo '#line 6059 "configure"' > conftest.$ac_ext
   if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
@@ -7907,11 +7909,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:7910: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:7912: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:7914: \$? = $ac_status" >&5
+   echo "$as_me:7916: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -8246,11 +8248,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:8249: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:8251: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:8253: \$? = $ac_status" >&5
+   echo "$as_me:8255: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -8351,11 +8353,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:8354: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:8356: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:8358: \$? = $ac_status" >&5
+   echo "$as_me:8360: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -8406,11 +8408,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:8409: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:8411: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:8413: \$? = $ac_status" >&5
+   echo "$as_me:8415: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -11209,7 +11211,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11212 "configure"
+#line 11214 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11305,7 +11307,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11308 "configure"
+#line 11310 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12133,7 +12135,7 @@ elif test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}; then
 
 elif test -d ${kernelsrc}-obj/${target_cpu}/default; then
 
-                       kernelbuild=${kernelsrc}-obj/${target_cpu}/default
+                       kernelbuild=${kernelsrc}-obj/${target_cpu}/default
 
 elif test -d `dirname ${kernelsrc}`/build-${target_cpu}; then
 
@@ -12286,17 +12288,25 @@ fi
 $as_echo_n "checking spl source directory... " >&6; }
        if test -z "$splsrc"; then
 
-               sourcelink=`ls -1d /usr/src/spl-*/${LINUX_VERSION} \
+                                                               sourcelink=`ls -1d /usr/src/spl-*/${LINUX_VERSION} \
                            2>/dev/null | tail -1`
 
-               if test -z "$sourcelink" || test ! -e $sourcelink; then
+                                                               if test -z "$sourcelink" || test ! -e $sourcelink/spl_config.h; then
+
+                       sourcelink=`ls -1d /var/lib/dkms/spl/*/build \
+                                   2>/dev/null | tail -1`
+
+fi
+
+
+                                                               if test -z "$sourcelink" || test ! -e $sourcelink/spl_config.h; then
 
                        sourcelink=../spl
 
 fi
 
 
-               if test -e $sourcelink; then
+               if test -e $sourcelink/spl_config.h; then
 
                        splsrc=`readlink -f ${sourcelink}`
 
@@ -12384,26 +12394,54 @@ $as_echo "$splsrcver" >&6; }
 
 
 
+
+# Check whether --with-spl-timeout was given.
+if test "${with_spl_timeout+set}" = set; then
+  withval=$with_spl_timeout; timeout="$withval"
+else
+  timeout=0
+fi
+
+
        { $as_echo "$as_me:$LINENO: checking spl file name for module symbols" >&5
 $as_echo_n "checking spl file name for module symbols... " >&6; }
-       if test -r $SPL_OBJ/Module.symvers; then
+       SPL_SYMBOLS=NONE
 
-               SPL_SYMBOLS=Module.symvers
+       while true; do
+               if test -r $SPL_OBJ/Module.symvers; then
+
+                       SPL_SYMBOLS=Module.symvers
 
 elif test -r $SPL_OBJ/Modules.symvers; then
 
-               SPL_SYMBOLS=Modules.symvers
+                       SPL_SYMBOLS=Modules.symvers
 
 elif test -r $SPL_OBJ/module/Module.symvers; then
 
-               SPL_SYMBOLS=Module.symvers
+                       SPL_SYMBOLS=Module.symvers
 
 elif test -r $SPL_OBJ/module/Modules.symvers; then
 
-               SPL_SYMBOLS=Modules.symvers
+                       SPL_SYMBOLS=Modules.symvers
+
+fi
+
+
+               if test $SPL_SYMBOLS != NONE -o $timeout -le 0; then
+
+                       break;
 
 else
 
+                       sleep 1
+                       timeout=$((timeout-1))
+
+fi
+
+       done
+
+       if test "$SPL_SYMBOLS" = NONE; then
+
                SPL_SYMBOLS=$LINUX_SYMBOLS
 
 fi
@@ -13009,35 +13047,101 @@ fi
 
 
 
+       { $as_echo "$as_me:$LINENO: checking whether blkdev_get_by_path() is available" >&5
+$as_echo_n "checking whether blkdev_get_by_path() is available... " >&6; }
+
+
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+               #include <linux/fs.h>
+
+int
+main (void)
+{
+
+               blkdev_get_by_path(NULL, 0, NULL);
+
+  ;
+  return 0;
+}
+
+_ACEOF
+
+
+       rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+       echo "obj-m := conftest.o" >build/Makefile
+       modpost_flag=''
+       test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+       if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
+fi
+
+       rm -Rf build
+
+
+       if test $rc -ne 0; then :
+
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+       else
+               if test "x$enable_linux_builtin" != xyes; then
 
-       { $as_echo "$as_me:$LINENO: checking whether symbol blkdev_get_by_path is exported" >&5
-$as_echo_n "checking whether symbol blkdev_get_by_path is exported... " >&6; }
        grep -q -E '[[:space:]]blkdev_get_by_path[[:space:]]' \
                $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
        rc=$?
        if test $rc -ne 0; then
-
                export=0
                for file in fs/block_dev.c; do
-                       grep -q -E "EXPORT_SYMBOL.*(blkdev_get_by_path)" "$LINUX/$file" 2>/dev/null
+                       grep -q -E "EXPORT_SYMBOL.*(blkdev_get_by_path)" \
+                               "$LINUX/$file" 2>/dev/null
                        rc=$?
                        if test $rc -eq 0; then
-
                                export=1
                                break;
-
-fi
-
+                       fi
                done
-               if test $export -eq 0; then
+               if test $export -eq 0; then :
+                       rc=1
+               else :
+                       rc=0
+               fi
+       else :
+               rc=0
+       fi
 
-                       { $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
+               fi
+               if test $rc -ne 0; then :
 
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+               else :
 
-                       { $as_echo "$as_me:$LINENO: result: yes" >&5
+               { $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
 
 cat >>confdefs.h <<\_ACEOF
@@ -13045,63 +13149,103 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
+               fi
+       fi
 
 
-else
+       { $as_echo "$as_me:$LINENO: checking whether open_bdev_exclusive() is available" >&5
+$as_echo_n "checking whether open_bdev_exclusive() is available... " >&6; }
 
-               { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_BLKDEV_GET_BY_PATH 1
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+               #include <linux/fs.h>
+
+int
+main (void)
+{
+
+               open_bdev_exclusive(NULL, 0, NULL);
+
+  ;
+  return 0;
+}
+
 _ACEOF
 
 
+       rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+       echo "obj-m := conftest.o" >build/Makefile
+       modpost_flag=''
+       test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+       if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
 fi
 
+       rm -Rf build
+
+
+       if test $rc -ne 0; then :
 
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
+       else
+               if test "x$enable_linux_builtin" != xyes; then
 
-       { $as_echo "$as_me:$LINENO: checking whether symbol open_bdev_exclusive is exported" >&5
-$as_echo_n "checking whether symbol open_bdev_exclusive is exported... " >&6; }
        grep -q -E '[[:space:]]open_bdev_exclusive[[:space:]]' \
                $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
        rc=$?
        if test $rc -ne 0; then
-
                export=0
                for file in fs/block_dev.c; do
-                       grep -q -E "EXPORT_SYMBOL.*(open_bdev_exclusive)" "$LINUX/$file" 2>/dev/null
+                       grep -q -E "EXPORT_SYMBOL.*(open_bdev_exclusive)" \
+                               "$LINUX/$file" 2>/dev/null
                        rc=$?
                        if test $rc -eq 0; then
-
                                export=1
                                break;
-
-fi
-
+                       fi
                done
-               if test $export -eq 0; then
-
-                       { $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
-
-
-else
-
-                       { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
-
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_OPEN_BDEV_EXCLUSIVE 1
-_ACEOF
-
+               if test $export -eq 0; then :
+                       rc=1
+               else :
+                       rc=0
+               fi
+       else :
+               rc=0
+       fi
 
-fi
+               fi
+               if test $rc -ne 0; then :
 
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+               else :
 
                { $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
@@ -13111,8 +13255,8 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
-
+               fi
+       fi
 
 
 
@@ -15013,66 +15157,11 @@ fi
 
        EXTRA_KCFLAGS="$tmp_flags"
 
-
-       { $as_echo "$as_me:$LINENO: checking whether symbol get_gendisk is exported" >&5
-$as_echo_n "checking whether symbol get_gendisk is exported... " >&6; }
-       grep -q -E '[[:space:]]get_gendisk[[:space:]]' \
-               $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
-       rc=$?
-       if test $rc -ne 0; then
-
-               export=0
-               for file in block/genhd.c; do
-                       grep -q -E "EXPORT_SYMBOL.*(get_gendisk)" "$LINUX/$file" 2>/dev/null
-                       rc=$?
-                       if test $rc -eq 0; then
-
-                               export=1
-                               break;
-
-fi
-
-               done
-               if test $export -eq 0; then
-
-                       { $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
-
-
-else
-
-                       { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
-
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_GET_GENDISK 1
-_ACEOF
-
-
-fi
-
-
-else
-
-               { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
-
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_GET_GENDISK 1
-_ACEOF
-
-
-fi
+       { $as_echo "$as_me:$LINENO: checking whether get_gendisk() is available" >&5
+$as_echo_n "checking whether get_gendisk() is available... " >&6; }
 
 
 
-
-       { $as_echo "$as_me:$LINENO: checking whether rq_is_sync() is available" >&5
-$as_echo_n "checking whether rq_is_sync() is available... " >&6; }
-       tmp_flags="$EXTRA_KCFLAGS"
-       EXTRA_KCFLAGS="-Wno-unused-but-set-variable"
-
-
 cat confdefs.h - <<_ACEOF >conftest.c
 /* confdefs.h.  */
 _ACEOF
@@ -15081,14 +15170,13 @@ cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
 
 
-               #include <linux/blkdev.h>
+               #include <linux/genhd.h>
 
 int
 main (void)
 {
 
-               struct request *req = NULL;
-               (void) rq_is_sync(req);
+               get_gendisk(0, NULL);
 
   ;
   return 0;
@@ -15112,22 +15200,11 @@ _ACEOF
   ac_status=$?
   $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
   (exit $ac_status); }; }; then
-
-               { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
-
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_RQ_IS_SYNC 1
-_ACEOF
-
-
+  rc=0
 else
   $as_echo "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
-
-               { $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
-
+ rc=1
 
 
 fi
@@ -15135,13 +15212,133 @@ fi
        rm -Rf build
 
 
-       EXTRA_KCFLAGS="$tmp_flags"
+       if test $rc -ne 0; then :
 
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-       { $as_echo "$as_me:$LINENO: checking whether rq_for_each_segment() is available" >&5
-$as_echo_n "checking whether rq_for_each_segment() is available... " >&6; }
-       tmp_flags="$EXTRA_KCFLAGS"
-       EXTRA_KCFLAGS="-Wno-unused-but-set-variable"
+       else
+               if test "x$enable_linux_builtin" != xyes; then
+
+       grep -q -E '[[:space:]]get_gendisk[[:space:]]' \
+               $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
+       rc=$?
+       if test $rc -ne 0; then
+               export=0
+               for file in block/genhd.c; do
+                       grep -q -E "EXPORT_SYMBOL.*(get_gendisk)" \
+                               "$LINUX/$file" 2>/dev/null
+                       rc=$?
+                       if test $rc -eq 0; then
+                               export=1
+                               break;
+                       fi
+               done
+               if test $export -eq 0; then :
+                       rc=1
+               else :
+                       rc=0
+               fi
+       else :
+               rc=0
+       fi
+
+               fi
+               if test $rc -ne 0; then :
+
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+               else :
+
+               { $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_GET_GENDISK 1
+_ACEOF
+
+
+               fi
+       fi
+
+
+
+       { $as_echo "$as_me:$LINENO: checking whether rq_is_sync() is available" >&5
+$as_echo_n "checking whether rq_is_sync() is available... " >&6; }
+       tmp_flags="$EXTRA_KCFLAGS"
+       EXTRA_KCFLAGS="-Wno-unused-but-set-variable"
+
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+               #include <linux/blkdev.h>
+
+int
+main (void)
+{
+
+               struct request *req = NULL;
+               (void) rq_is_sync(req);
+
+  ;
+  return 0;
+}
+
+_ACEOF
+
+
+       rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+       echo "obj-m := conftest.o" >build/Makefile
+       modpost_flag=''
+       test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+       if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+
+               { $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_RQ_IS_SYNC 1
+_ACEOF
+
+
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+
+
+fi
+
+       rm -Rf build
+
+
+       EXTRA_KCFLAGS="$tmp_flags"
+
+
+       { $as_echo "$as_me:$LINENO: checking whether rq_for_each_segment() is available" >&5
+$as_echo_n "checking whether rq_for_each_segment() is available... " >&6; }
+       tmp_flags="$EXTRA_KCFLAGS"
+       EXTRA_KCFLAGS="-Wno-unused-but-set-variable"
 
 
 cat confdefs.h - <<_ACEOF >conftest.c
@@ -15210,6 +15407,75 @@ fi
 
        EXTRA_KCFLAGS="$tmp_flags"
 
+
+       { $as_echo "$as_me:$LINENO: checking whether ql->discard_granularity is available" >&5
+$as_echo_n "checking whether ql->discard_granularity is available... " >&6; }
+
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+               #include <linux/blkdev.h>
+
+int
+main (void)
+{
+
+               struct queue_limits ql __attribute__ ((unused));
+
+               ql.discard_granularity = 0;
+
+  ;
+  return 0;
+}
+
+_ACEOF
+
+
+       rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+       echo "obj-m := conftest.o" >build/Makefile
+       modpost_flag=''
+       test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+       if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+
+               { $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_DISCARD_GRANULARITY 1
+_ACEOF
+
+
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+
+
+fi
+
+       rm -Rf build
+
+
+
        { $as_echo "$as_me:$LINENO: checking whether super_block uses const struct xattr_hander" >&5
 $as_echo_n "checking whether super_block uses const struct xattr_hander... " >&6; }
 
@@ -16484,15 +16750,15 @@ cat >>conftest.$ac_ext <<_ACEOF
 
 
                #include <linux/dcache.h>
+               struct vfsmount *d_automount(struct path *p) { return NULL; }
+               struct dentry_operations dops __attribute__ ((unused)) = {
+                       .d_automount = d_automount,
+               };
 
 int
 main (void)
 {
 
-               struct vfsmount *(*d_automount) (struct path *) = NULL;
-               struct dentry_operations dops __attribute__ ((unused)) = {
-                       .d_automount = d_automount,
-               };
 
   ;
   return 0;
@@ -16611,99 +16877,205 @@ fi
 
 
 
+       { $as_echo "$as_me:$LINENO: checking whether clear_inode() is available" >&5
+$as_echo_n "checking whether clear_inode() is available... " >&6; }
 
-       { $as_echo "$as_me:$LINENO: checking whether symbol clear_inode is exported" >&5
-$as_echo_n "checking whether symbol clear_inode is exported... " >&6; }
-       grep -q -E '[[:space:]]clear_inode[[:space:]]' \
-               $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
-       rc=$?
-       if test $rc -ne 0; then
-
-               export=0
-               for file in fs/inode.c; do
-                       grep -q -E "EXPORT_SYMBOL.*(clear_inode)" "$LINUX/$file" 2>/dev/null
-                       rc=$?
-                       if test $rc -eq 0; then
 
-                               export=1
-                               break;
 
-fi
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
 
-               done
-               if test $export -eq 0; then
 
-                       { $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
+               #include <linux/fs.h>
 
+int
+main (void)
+{
 
-else
+               clear_inode(NULL);
 
-                       { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
+  ;
+  return 0;
+}
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_CLEAR_INODE 1
 _ACEOF
 
 
-fi
-
-
+       rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+       echo "obj-m := conftest.o" >build/Makefile
+       modpost_flag=''
+       test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+       if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
 else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
 
-               { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_CLEAR_INODE 1
-_ACEOF
+fi
 
+       rm -Rf build
 
-fi
 
+       if test $rc -ne 0; then :
 
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
+       else
+               if test "x$enable_linux_builtin" != xyes; then
 
-       { $as_echo "$as_me:$LINENO: checking whether symbol insert_inode_locked is exported" >&5
-$as_echo_n "checking whether symbol insert_inode_locked is exported... " >&6; }
-       grep -q -E '[[:space:]]insert_inode_locked[[:space:]]' \
+       grep -q -E '[[:space:]]clear_inode[[:space:]]' \
                $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
        rc=$?
        if test $rc -ne 0; then
-
                export=0
                for file in fs/inode.c; do
-                       grep -q -E "EXPORT_SYMBOL.*(insert_inode_locked)" "$LINUX/$file" 2>/dev/null
+                       grep -q -E "EXPORT_SYMBOL.*(clear_inode)" \
+                               "$LINUX/$file" 2>/dev/null
                        rc=$?
                        if test $rc -eq 0; then
-
                                export=1
                                break;
-
-fi
-
+                       fi
                done
-               if test $export -eq 0; then
+               if test $export -eq 0; then :
+                       rc=1
+               else :
+                       rc=0
+               fi
+       else :
+               rc=0
+       fi
 
-                       { $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
+               fi
+               if test $rc -ne 0; then :
 
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+               else :
 
-                       { $as_echo "$as_me:$LINENO: result: yes" >&5
+               { $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
 
 cat >>confdefs.h <<\_ACEOF
-#define HAVE_INSERT_INODE_LOCKED 1
+#define HAVE_CLEAR_INODE 1
 _ACEOF
 
 
-fi
+               fi
+       fi
+
+
+       { $as_echo "$as_me:$LINENO: checking whether insert_inode_locked() is available" >&5
+$as_echo_n "checking whether insert_inode_locked() is available... " >&6; }
+
+
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+               #include <linux/fs.h>
+
+int
+main (void)
+{
+
+               insert_inode_locked(NULL);
+
+  ;
+  return 0;
+}
+
+_ACEOF
 
 
+       rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+       echo "obj-m := conftest.o" >build/Makefile
+       modpost_flag=''
+       test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+       if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
 else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
+fi
+
+       rm -Rf build
+
+
+       if test $rc -ne 0; then :
+
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+       else
+               if test "x$enable_linux_builtin" != xyes; then
+
+       grep -q -E '[[:space:]]insert_inode_locked[[:space:]]' \
+               $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
+       rc=$?
+       if test $rc -ne 0; then
+               export=0
+               for file in fs/inode.c; do
+                       grep -q -E "EXPORT_SYMBOL.*(insert_inode_locked)" \
+                               "$LINUX/$file" 2>/dev/null
+                       rc=$?
+                       if test $rc -eq 0; then
+                               export=1
+                               break;
+                       fi
+               done
+               if test $export -eq 0; then :
+                       rc=1
+               else :
+                       rc=0
+               fi
+       else :
+               rc=0
+       fi
+
+               fi
+               if test $rc -ne 0; then :
+
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+               else :
 
                { $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
@@ -16713,39 +17085,105 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
+               fi
+       fi
+
+
+       { $as_echo "$as_me:$LINENO: checking whether d_make_root() is available" >&5
+$as_echo_n "checking whether d_make_root() is available... " >&6; }
+
+
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+               #include <linux/dcache.h>
+
+int
+main (void)
+{
+
+               d_make_root(NULL);
+
+  ;
+  return 0;
+}
+
+_ACEOF
+
+
+       rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+       echo "obj-m := conftest.o" >build/Makefile
+       modpost_flag=''
+       test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+       if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
 fi
 
+       rm -Rf build
+
 
+       if test $rc -ne 0; then :
 
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+       else
+               if test "x$enable_linux_builtin" != xyes; then
 
-       { $as_echo "$as_me:$LINENO: checking whether symbol d_make_root is exported" >&5
-$as_echo_n "checking whether symbol d_make_root is exported... " >&6; }
        grep -q -E '[[:space:]]d_make_root[[:space:]]' \
                $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
        rc=$?
        if test $rc -ne 0; then
-
                export=0
                for file in fs/dcache.c; do
-                       grep -q -E "EXPORT_SYMBOL.*(d_make_root)" "$LINUX/$file" 2>/dev/null
+                       grep -q -E "EXPORT_SYMBOL.*(d_make_root)" \
+                               "$LINUX/$file" 2>/dev/null
                        rc=$?
                        if test $rc -eq 0; then
-
                                export=1
                                break;
-
-fi
-
+                       fi
                done
-               if test $export -eq 0; then
+               if test $export -eq 0; then :
+                       rc=1
+               else :
+                       rc=0
+               fi
+       else :
+               rc=0
+       fi
 
-                       { $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
+               fi
+               if test $rc -ne 0; then :
 
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+               else :
 
-                       { $as_echo "$as_me:$LINENO: result: yes" >&5
+               { $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
 
 cat >>confdefs.h <<\_ACEOF
@@ -16753,52 +17191,105 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
+               fi
+       fi
 
 
-else
+       { $as_echo "$as_me:$LINENO: checking whether d_obtain_alias() is available" >&5
+$as_echo_n "checking whether d_obtain_alias() is available... " >&6; }
 
-               { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_D_MAKE_ROOT 1
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+               #include <linux/dcache.h>
+
+int
+main (void)
+{
+
+               d_obtain_alias(NULL);
+
+  ;
+  return 0;
+}
+
 _ACEOF
 
 
+       rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+       echo "obj-m := conftest.o" >build/Makefile
+       modpost_flag=''
+       test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+       if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
 fi
 
+       rm -Rf build
+
 
+       if test $rc -ne 0; then :
+
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
+       else
+               if test "x$enable_linux_builtin" != xyes; then
 
-       { $as_echo "$as_me:$LINENO: checking whether symbol d_obtain_alias is exported" >&5
-$as_echo_n "checking whether symbol d_obtain_alias is exported... " >&6; }
        grep -q -E '[[:space:]]d_obtain_alias[[:space:]]' \
                $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
        rc=$?
        if test $rc -ne 0; then
-
                export=0
                for file in fs/dcache.c; do
-                       grep -q -E "EXPORT_SYMBOL.*(d_obtain_alias)" "$LINUX/$file" 2>/dev/null
+                       grep -q -E "EXPORT_SYMBOL.*(d_obtain_alias)" \
+                               "$LINUX/$file" 2>/dev/null
                        rc=$?
                        if test $rc -eq 0; then
-
                                export=1
                                break;
-
-fi
-
+                       fi
                done
-               if test $export -eq 0; then
+               if test $export -eq 0; then :
+                       rc=1
+               else :
+                       rc=0
+               fi
+       else :
+               rc=0
+       fi
 
-                       { $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
+               fi
+               if test $rc -ne 0; then :
 
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+               else :
 
-                       { $as_echo "$as_me:$LINENO: result: yes" >&5
+               { $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
 
 cat >>confdefs.h <<\_ACEOF
@@ -16806,52 +17297,105 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
+               fi
+       fi
 
 
-else
+       { $as_echo "$as_me:$LINENO: checking whether check_disk_size_change() is available" >&5
+$as_echo_n "checking whether check_disk_size_change() is available... " >&6; }
 
-               { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_D_OBTAIN_ALIAS 1
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+               #include <linux/fs.h>
+
+int
+main (void)
+{
+
+               check_disk_size_change(NULL, NULL);
+
+  ;
+  return 0;
+}
+
 _ACEOF
 
 
+       rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+       echo "obj-m := conftest.o" >build/Makefile
+       modpost_flag=''
+       test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+       if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
 fi
 
+       rm -Rf build
+
 
+       if test $rc -ne 0; then :
 
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+       else
+               if test "x$enable_linux_builtin" != xyes; then
 
-       { $as_echo "$as_me:$LINENO: checking whether symbol check_disk_size_change is exported" >&5
-$as_echo_n "checking whether symbol check_disk_size_change is exported... " >&6; }
        grep -q -E '[[:space:]]check_disk_size_change[[:space:]]' \
                $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
        rc=$?
        if test $rc -ne 0; then
-
                export=0
                for file in fs/block_dev.c; do
-                       grep -q -E "EXPORT_SYMBOL.*(check_disk_size_change)" "$LINUX/$file" 2>/dev/null
+                       grep -q -E "EXPORT_SYMBOL.*(check_disk_size_change)" \
+                               "$LINUX/$file" 2>/dev/null
                        rc=$?
                        if test $rc -eq 0; then
-
                                export=1
                                break;
-
-fi
-
+                       fi
                done
-               if test $export -eq 0; then
+               if test $export -eq 0; then :
+                       rc=1
+               else :
+                       rc=0
+               fi
+       else :
+               rc=0
+       fi
 
-                       { $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
+               fi
+               if test $rc -ne 0; then :
 
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+               else :
 
-                       { $as_echo "$as_me:$LINENO: result: yes" >&5
+               { $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
 
 cat >>confdefs.h <<\_ACEOF
@@ -16859,63 +17403,103 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
+               fi
+       fi
 
 
-else
+       { $as_echo "$as_me:$LINENO: checking whether truncate_setsize() is available" >&5
+$as_echo_n "checking whether truncate_setsize() is available... " >&6; }
 
-               { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_CHECK_DISK_SIZE_CHANGE 1
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+               #include <linux/mm.h>
+
+int
+main (void)
+{
+
+               truncate_setsize(NULL, 0);
+
+  ;
+  return 0;
+}
+
 _ACEOF
 
 
+       rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+       echo "obj-m := conftest.o" >build/Makefile
+       modpost_flag=''
+       test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+       if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
 fi
 
+       rm -Rf build
+
+
+       if test $rc -ne 0; then :
 
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
+       else
+               if test "x$enable_linux_builtin" != xyes; then
 
-       { $as_echo "$as_me:$LINENO: checking whether symbol truncate_setsize is exported" >&5
-$as_echo_n "checking whether symbol truncate_setsize is exported... " >&6; }
        grep -q -E '[[:space:]]truncate_setsize[[:space:]]' \
                $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
        rc=$?
        if test $rc -ne 0; then
-
                export=0
                for file in mm/truncate.c; do
-                       grep -q -E "EXPORT_SYMBOL.*(truncate_setsize)" "$LINUX/$file" 2>/dev/null
+                       grep -q -E "EXPORT_SYMBOL.*(truncate_setsize)" \
+                               "$LINUX/$file" 2>/dev/null
                        rc=$?
                        if test $rc -eq 0; then
-
                                export=1
                                break;
-
-fi
-
+                       fi
                done
-               if test $export -eq 0; then
-
-                       { $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
-
-
-else
-
-                       { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
-
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_TRUNCATE_SETSIZE 1
-_ACEOF
-
+               if test $export -eq 0; then :
+                       rc=1
+               else :
+                       rc=0
+               fi
+       else :
+               rc=0
+       fi
 
-fi
+               fi
+               if test $rc -ne 0; then :
 
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+               else :
 
                { $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
@@ -16925,8 +17509,8 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
-
+               fi
+       fi
 
 
 
@@ -17081,35 +17665,101 @@ fi
 
        EXTRA_KCFLAGS="$tmp_flags"
 
+       { $as_echo "$as_me:$LINENO: checking whether mount_nodev() is available" >&5
+$as_echo_n "checking whether mount_nodev() is available... " >&6; }
+
+
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+               #include <linux/fs.h>
+
+int
+main (void)
+{
+
+               mount_nodev(NULL, 0, NULL, NULL);
+
+  ;
+  return 0;
+}
+
+_ACEOF
+
+
+       rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+       echo "obj-m := conftest.o" >build/Makefile
+       modpost_flag=''
+       test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+       if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
+fi
+
+       rm -Rf build
+
+
+       if test $rc -ne 0; then :
+
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+       else
+               if test "x$enable_linux_builtin" != xyes; then
 
-       { $as_echo "$as_me:$LINENO: checking whether symbol mount_nodev is exported" >&5
-$as_echo_n "checking whether symbol mount_nodev is exported... " >&6; }
        grep -q -E '[[:space:]]mount_nodev[[:space:]]' \
                $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
        rc=$?
        if test $rc -ne 0; then
-
                export=0
                for file in fs/super.c; do
-                       grep -q -E "EXPORT_SYMBOL.*(mount_nodev)" "$LINUX/$file" 2>/dev/null
+                       grep -q -E "EXPORT_SYMBOL.*(mount_nodev)" \
+                               "$LINUX/$file" 2>/dev/null
                        rc=$?
                        if test $rc -eq 0; then
-
                                export=1
                                break;
-
-fi
-
+                       fi
                done
-               if test $export -eq 0; then
+               if test $export -eq 0; then :
+                       rc=1
+               else :
+                       rc=0
+               fi
+       else :
+               rc=0
+       fi
 
-                       { $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
+               fi
+               if test $rc -ne 0; then :
 
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+               else :
 
-                       { $as_echo "$as_me:$LINENO: result: yes" >&5
+               { $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
 
 cat >>confdefs.h <<\_ACEOF
@@ -17117,26 +17767,87 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
-
+               fi
+       fi
+
+
+
+       { $as_echo "$as_me:$LINENO: checking whether super_block has s_shrink" >&5
+$as_echo_n "checking whether super_block has s_shrink... " >&6; }
+
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+               #include <linux/fs.h>
+
+int
+main (void)
+{
+
+               int (*shrink)(struct shrinker *, struct shrink_control *sc)
+                       __attribute__ ((unused)) = NULL;
+               struct super_block sb __attribute__ ((unused)) = {
+                       .s_shrink.shrink = shrink,
+                       .s_shrink.seeks = DEFAULT_SEEKS,
+                       .s_shrink.batch = 0,
+               };
+
+  ;
+  return 0;
+}
+
+_ACEOF
+
+
+       rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+       echo "obj-m := conftest.o" >build/Makefile
+       modpost_flag=''
+       test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+       if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+
+               { $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_SHRINK 1
+_ACEOF
+
+
 
 else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
 
-               { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_MOUNT_NODEV 1
-_ACEOF
 
 
 fi
 
+       rm -Rf build
 
 
 
-       { $as_echo "$as_me:$LINENO: checking whether super_block has s_shrink" >&5
-$as_echo_n "checking whether super_block has s_shrink... " >&6; }
+
+       { $as_echo "$as_me:$LINENO: checking whether super_block has s_bdi" >&5
+$as_echo_n "checking whether super_block has s_bdi... " >&6; }
 
 
 cat confdefs.h - <<_ACEOF >conftest.c
@@ -17153,13 +17864,8 @@ int
 main (void)
 {
 
-               int (*shrink)(struct shrinker *, struct shrink_control *sc)
-                       __attribute__ ((unused)) = NULL;
-               struct super_block sb __attribute__ ((unused)) = {
-                       .s_shrink.shrink = shrink,
-                       .s_shrink.seeks = DEFAULT_SEEKS,
-                       .s_shrink.batch = 0,
-               };
+               struct super_block sb __attribute__ ((unused));
+               sb.s_bdi = NULL;
 
   ;
   return 0;
@@ -17188,11 +17894,10 @@ _ACEOF
 $as_echo "yes" >&6; }
 
 cat >>confdefs.h <<\_ACEOF
-#define HAVE_SHRINK 1
+#define HAVE_BDI 1
 _ACEOF
 
 
-
 else
   $as_echo "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
@@ -17208,9 +17913,9 @@ fi
 
 
 
+       { $as_echo "$as_me:$LINENO: checking whether bdi_setup_and_register() is available" >&5
+$as_echo_n "checking whether bdi_setup_and_register() is available... " >&6; }
 
-       { $as_echo "$as_me:$LINENO: checking whether super_block has s_bdi" >&5
-$as_echo_n "checking whether super_block has s_bdi... " >&6; }
 
 
 cat confdefs.h - <<_ACEOF >conftest.c
@@ -17221,14 +17926,13 @@ cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
 
 
-               #include <linux/fs.h>
+               #include <linux/backing-dev.h>
 
 int
 main (void)
 {
 
-               struct super_block sb __attribute__ ((unused));
-               sb.s_bdi = NULL;
+               bdi_setup_and_register(NULL, NULL, 0);
 
   ;
   return 0;
@@ -17252,22 +17956,11 @@ _ACEOF
   ac_status=$?
   $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
   (exit $ac_status); }; }; then
-
-               { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
-
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_BDI 1
-_ACEOF
-
-
+  rc=0
 else
   $as_echo "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
-
-               { $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
-
+ rc=1
 
 
 fi
@@ -17275,47 +17968,44 @@ fi
        rm -Rf build
 
 
+       if test $rc -ne 0; then :
 
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+       else
+               if test "x$enable_linux_builtin" != xyes; then
 
-       { $as_echo "$as_me:$LINENO: checking whether symbol bdi_setup_and_register is exported" >&5
-$as_echo_n "checking whether symbol bdi_setup_and_register is exported... " >&6; }
        grep -q -E '[[:space:]]bdi_setup_and_register[[:space:]]' \
                $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
        rc=$?
        if test $rc -ne 0; then
-
                export=0
                for file in mm/backing-dev.c; do
-                       grep -q -E "EXPORT_SYMBOL.*(bdi_setup_and_register)" "$LINUX/$file" 2>/dev/null
+                       grep -q -E "EXPORT_SYMBOL.*(bdi_setup_and_register)" \
+                               "$LINUX/$file" 2>/dev/null
                        rc=$?
                        if test $rc -eq 0; then
-
                                export=1
                                break;
-
-fi
-
+                       fi
                done
-               if test $export -eq 0; then
-
-                       { $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
-
-
-else
-
-                       { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
-
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_BDI_SETUP_AND_REGISTER 1
-_ACEOF
-
+               if test $export -eq 0; then :
+                       rc=1
+               else :
+                       rc=0
+               fi
+       else :
+               rc=0
+       fi
 
-fi
+               fi
+               if test $rc -ne 0; then :
 
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+               else :
 
                { $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
@@ -17325,8 +18015,8 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
-
+               fi
+       fi
 
 
 
@@ -19054,7 +19744,7 @@ elif test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}; then
 
 elif test -d ${kernelsrc}-obj/${target_cpu}/default; then
 
-                       kernelbuild=${kernelsrc}-obj/${target_cpu}/default
+                       kernelbuild=${kernelsrc}-obj/${target_cpu}/default
 
 elif test -d `dirname ${kernelsrc}`/build-${target_cpu}; then
 
@@ -19207,17 +19897,25 @@ fi
 $as_echo_n "checking spl source directory... " >&6; }
        if test -z "$splsrc"; then
 
-               sourcelink=`ls -1d /usr/src/spl-*/${LINUX_VERSION} \
+                                                               sourcelink=`ls -1d /usr/src/spl-*/${LINUX_VERSION} \
                            2>/dev/null | tail -1`
 
-               if test -z "$sourcelink" || test ! -e $sourcelink; then
+                                                               if test -z "$sourcelink" || test ! -e $sourcelink/spl_config.h; then
+
+                       sourcelink=`ls -1d /var/lib/dkms/spl/*/build \
+                                   2>/dev/null | tail -1`
+
+fi
+
+
+                                                               if test -z "$sourcelink" || test ! -e $sourcelink/spl_config.h; then
 
                        sourcelink=../spl
 
 fi
 
 
-               if test -e $sourcelink; then
+               if test -e $sourcelink/spl_config.h; then
 
                        splsrc=`readlink -f ${sourcelink}`
 
@@ -19305,26 +20003,54 @@ $as_echo "$splsrcver" >&6; }
 
 
 
+
+# Check whether --with-spl-timeout was given.
+if test "${with_spl_timeout+set}" = set; then
+  withval=$with_spl_timeout; timeout="$withval"
+else
+  timeout=0
+fi
+
+
        { $as_echo "$as_me:$LINENO: checking spl file name for module symbols" >&5
 $as_echo_n "checking spl file name for module symbols... " >&6; }
-       if test -r $SPL_OBJ/Module.symvers; then
+       SPL_SYMBOLS=NONE
+
+       while true; do
+               if test -r $SPL_OBJ/Module.symvers; then
 
-               SPL_SYMBOLS=Module.symvers
+                       SPL_SYMBOLS=Module.symvers
 
 elif test -r $SPL_OBJ/Modules.symvers; then
 
-               SPL_SYMBOLS=Modules.symvers
+                       SPL_SYMBOLS=Modules.symvers
 
 elif test -r $SPL_OBJ/module/Module.symvers; then
 
-               SPL_SYMBOLS=Module.symvers
+                       SPL_SYMBOLS=Module.symvers
 
 elif test -r $SPL_OBJ/module/Modules.symvers; then
 
-               SPL_SYMBOLS=Modules.symvers
+                       SPL_SYMBOLS=Modules.symvers
+
+fi
+
+
+               if test $SPL_SYMBOLS != NONE -o $timeout -le 0; then
+
+                       break;
 
 else
 
+                       sleep 1
+                       timeout=$((timeout-1))
+
+fi
+
+       done
+
+       if test "$SPL_SYMBOLS" = NONE; then
+
                SPL_SYMBOLS=$LINUX_SYMBOLS
 
 fi
@@ -19856,15 +20582,189 @@ $as_echo "no" >&6; }
 
 
 
-fi
+fi
+
+       rm -Rf build
+
+
+
+
+       { $as_echo "$as_me:$LINENO: checking whether blkdev_get() wants 3 args" >&5
+$as_echo_n "checking whether blkdev_get() wants 3 args... " >&6; }
+
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+               #include <linux/fs.h>
+
+int
+main (void)
+{
+
+               struct block_device *bdev = NULL;
+               (void) blkdev_get(bdev, 0, NULL);
+
+  ;
+  return 0;
+}
+
+_ACEOF
+
+
+       rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+       echo "obj-m := conftest.o" >build/Makefile
+       modpost_flag=''
+       test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+       if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+
+               { $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_3ARG_BLKDEV_GET 1
+_ACEOF
+
+
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+
+
+fi
+
+       rm -Rf build
+
+
+
+       { $as_echo "$as_me:$LINENO: checking whether blkdev_get_by_path() is available" >&5
+$as_echo_n "checking whether blkdev_get_by_path() is available... " >&6; }
+
+
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+               #include <linux/fs.h>
+
+int
+main (void)
+{
+
+               blkdev_get_by_path(NULL, 0, NULL);
+
+  ;
+  return 0;
+}
+
+_ACEOF
+
+
+       rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+       echo "obj-m := conftest.o" >build/Makefile
+       modpost_flag=''
+       test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+       if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
+fi
+
+       rm -Rf build
+
+
+       if test $rc -ne 0; then :
+
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+       else
+               if test "x$enable_linux_builtin" != xyes; then
+
+       grep -q -E '[[:space:]]blkdev_get_by_path[[:space:]]' \
+               $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
+       rc=$?
+       if test $rc -ne 0; then
+               export=0
+               for file in fs/block_dev.c; do
+                       grep -q -E "EXPORT_SYMBOL.*(blkdev_get_by_path)" \
+                               "$LINUX/$file" 2>/dev/null
+                       rc=$?
+                       if test $rc -eq 0; then
+                               export=1
+                               break;
+                       fi
+               done
+               if test $export -eq 0; then :
+                       rc=1
+               else :
+                       rc=0
+               fi
+       else :
+               rc=0
+       fi
+
+               fi
+               if test $rc -ne 0; then :
+
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+               else :
+
+               { $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_BLKDEV_GET_BY_PATH 1
+_ACEOF
 
-       rm -Rf build
 
+               fi
+       fi
 
 
+       { $as_echo "$as_me:$LINENO: checking whether open_bdev_exclusive() is available" >&5
+$as_echo_n "checking whether open_bdev_exclusive() is available... " >&6; }
 
-       { $as_echo "$as_me:$LINENO: checking whether blkdev_get() wants 3 args" >&5
-$as_echo_n "checking whether blkdev_get() wants 3 args... " >&6; }
 
 
 cat confdefs.h - <<_ACEOF >conftest.c
@@ -19881,8 +20781,7 @@ int
 main (void)
 {
 
-               struct block_device *bdev = NULL;
-               (void) blkdev_get(bdev, 0, NULL);
+               open_bdev_exclusive(NULL, 0, NULL);
 
   ;
   return 0;
@@ -19906,22 +20805,11 @@ _ACEOF
   ac_status=$?
   $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
   (exit $ac_status); }; }; then
-
-               { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
-
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_3ARG_BLKDEV_GET 1
-_ACEOF
-
-
+  rc=0
 else
   $as_echo "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
-
-               { $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
-
+ rc=1
 
 
 fi
@@ -19929,100 +20817,44 @@ fi
        rm -Rf build
 
 
+       if test $rc -ne 0; then :
 
-
-       { $as_echo "$as_me:$LINENO: checking whether symbol blkdev_get_by_path is exported" >&5
-$as_echo_n "checking whether symbol blkdev_get_by_path is exported... " >&6; }
-       grep -q -E '[[:space:]]blkdev_get_by_path[[:space:]]' \
-               $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
-       rc=$?
-       if test $rc -ne 0; then
-
-               export=0
-               for file in fs/block_dev.c; do
-                       grep -q -E "EXPORT_SYMBOL.*(blkdev_get_by_path)" "$LINUX/$file" 2>/dev/null
-                       rc=$?
-                       if test $rc -eq 0; then
-
-                               export=1
-                               break;
-
-fi
-
-               done
-               if test $export -eq 0; then
-
-                       { $as_echo "$as_me:$LINENO: result: no" >&5
+               { $as_echo "$as_me:$LINENO: result: no" >&5
 $as_echo "no" >&6; }
 
+       else
+               if test "x$enable_linux_builtin" != xyes; then
 
-else
-
-                       { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
-
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_BLKDEV_GET_BY_PATH 1
-_ACEOF
-
-
-fi
-
-
-else
-
-               { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
-
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_BLKDEV_GET_BY_PATH 1
-_ACEOF
-
-
-fi
-
-
-
-
-       { $as_echo "$as_me:$LINENO: checking whether symbol open_bdev_exclusive is exported" >&5
-$as_echo_n "checking whether symbol open_bdev_exclusive is exported... " >&6; }
        grep -q -E '[[:space:]]open_bdev_exclusive[[:space:]]' \
                $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
        rc=$?
        if test $rc -ne 0; then
-
                export=0
                for file in fs/block_dev.c; do
-                       grep -q -E "EXPORT_SYMBOL.*(open_bdev_exclusive)" "$LINUX/$file" 2>/dev/null
+                       grep -q -E "EXPORT_SYMBOL.*(open_bdev_exclusive)" \
+                               "$LINUX/$file" 2>/dev/null
                        rc=$?
                        if test $rc -eq 0; then
-
                                export=1
                                break;
-
-fi
-
+                       fi
                done
-               if test $export -eq 0; then
-
-                       { $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
-
-
-else
-
-                       { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
-
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_OPEN_BDEV_EXCLUSIVE 1
-_ACEOF
-
+               if test $export -eq 0; then :
+                       rc=1
+               else :
+                       rc=0
+               fi
+       else :
+               rc=0
+       fi
 
-fi
+               fi
+               if test $rc -ne 0; then :
 
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+               else :
 
                { $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
@@ -20032,8 +20864,8 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
-
+               fi
+       fi
 
 
 
@@ -21934,35 +22766,101 @@ fi
 
        EXTRA_KCFLAGS="$tmp_flags"
 
+       { $as_echo "$as_me:$LINENO: checking whether get_gendisk() is available" >&5
+$as_echo_n "checking whether get_gendisk() is available... " >&6; }
+
+
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+               #include <linux/genhd.h>
+
+int
+main (void)
+{
+
+               get_gendisk(0, NULL);
+
+  ;
+  return 0;
+}
+
+_ACEOF
+
+
+       rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+       echo "obj-m := conftest.o" >build/Makefile
+       modpost_flag=''
+       test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+       if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
+fi
+
+       rm -Rf build
+
+
+       if test $rc -ne 0; then :
+
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+       else
+               if test "x$enable_linux_builtin" != xyes; then
 
-       { $as_echo "$as_me:$LINENO: checking whether symbol get_gendisk is exported" >&5
-$as_echo_n "checking whether symbol get_gendisk is exported... " >&6; }
        grep -q -E '[[:space:]]get_gendisk[[:space:]]' \
                $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
        rc=$?
        if test $rc -ne 0; then
-
                export=0
                for file in block/genhd.c; do
-                       grep -q -E "EXPORT_SYMBOL.*(get_gendisk)" "$LINUX/$file" 2>/dev/null
+                       grep -q -E "EXPORT_SYMBOL.*(get_gendisk)" \
+                               "$LINUX/$file" 2>/dev/null
                        rc=$?
                        if test $rc -eq 0; then
-
                                export=1
                                break;
-
-fi
-
+                       fi
                done
-               if test $export -eq 0; then
+               if test $export -eq 0; then :
+                       rc=1
+               else :
+                       rc=0
+               fi
+       else :
+               rc=0
+       fi
 
-                       { $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
+               fi
+               if test $rc -ne 0; then :
 
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+               else :
 
-                       { $as_echo "$as_me:$LINENO: result: yes" >&5
+               { $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
 
 cat >>confdefs.h <<\_ACEOF
@@ -21970,26 +22868,84 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
+               fi
+       fi
 
 
-else
+
+       { $as_echo "$as_me:$LINENO: checking whether rq_is_sync() is available" >&5
+$as_echo_n "checking whether rq_is_sync() is available... " >&6; }
+       tmp_flags="$EXTRA_KCFLAGS"
+       EXTRA_KCFLAGS="-Wno-unused-but-set-variable"
+
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+               #include <linux/blkdev.h>
+
+int
+main (void)
+{
+
+               struct request *req = NULL;
+               (void) rq_is_sync(req);
+
+  ;
+  return 0;
+}
+
+_ACEOF
+
+
+       rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+       echo "obj-m := conftest.o" >build/Makefile
+       modpost_flag=''
+       test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+       if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
 
                { $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
 
 cat >>confdefs.h <<\_ACEOF
-#define HAVE_GET_GENDISK 1
+#define HAVE_RQ_IS_SYNC 1
 _ACEOF
 
 
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+
+
 fi
 
+       rm -Rf build
+
 
+       EXTRA_KCFLAGS="$tmp_flags"
 
 
-       { $as_echo "$as_me:$LINENO: checking whether rq_is_sync() is available" >&5
-$as_echo_n "checking whether rq_is_sync() is available... " >&6; }
+       { $as_echo "$as_me:$LINENO: checking whether rq_for_each_segment() is available" >&5
+$as_echo_n "checking whether rq_for_each_segment() is available... " >&6; }
        tmp_flags="$EXTRA_KCFLAGS"
        EXTRA_KCFLAGS="-Wno-unused-but-set-variable"
 
@@ -22008,8 +22964,10 @@ int
 main (void)
 {
 
+               struct bio_vec *bv;
+               struct req_iterator iter;
                struct request *req = NULL;
-               (void) rq_is_sync(req);
+               rq_for_each_segment(bv, req, iter) { }
 
   ;
   return 0;
@@ -22038,7 +22996,7 @@ _ACEOF
 $as_echo "yes" >&6; }
 
 cat >>confdefs.h <<\_ACEOF
-#define HAVE_RQ_IS_SYNC 1
+#define HAVE_RQ_FOR_EACH_SEGMENT 1
 _ACEOF
 
 
@@ -22059,11 +23017,9 @@ fi
        EXTRA_KCFLAGS="$tmp_flags"
 
 
-       { $as_echo "$as_me:$LINENO: checking whether rq_for_each_segment() is available" >&5
-$as_echo_n "checking whether rq_for_each_segment() is available... " >&6; }
-       tmp_flags="$EXTRA_KCFLAGS"
-       EXTRA_KCFLAGS="-Wno-unused-but-set-variable"
-
+       { $as_echo "$as_me:$LINENO: checking whether ql->discard_granularity is available" >&5
+$as_echo_n "checking whether ql->discard_granularity is available... " >&6; }
+
 
 cat confdefs.h - <<_ACEOF >conftest.c
 /* confdefs.h.  */
@@ -22079,10 +23035,9 @@ int
 main (void)
 {
 
-               struct bio_vec *bv;
-               struct req_iterator iter;
-               struct request *req = NULL;
-               rq_for_each_segment(bv, req, iter) { }
+               struct queue_limits ql __attribute__ ((unused));
+
+               ql.discard_granularity = 0;
 
   ;
   return 0;
@@ -22111,7 +23066,7 @@ _ACEOF
 $as_echo "yes" >&6; }
 
 cat >>confdefs.h <<\_ACEOF
-#define HAVE_RQ_FOR_EACH_SEGMENT 1
+#define HAVE_DISCARD_GRANULARITY 1
 _ACEOF
 
 
@@ -22129,7 +23084,6 @@ fi
        rm -Rf build
 
 
-       EXTRA_KCFLAGS="$tmp_flags"
 
        { $as_echo "$as_me:$LINENO: checking whether super_block uses const struct xattr_hander" >&5
 $as_echo_n "checking whether super_block uses const struct xattr_hander... " >&6; }
@@ -23405,15 +24359,15 @@ cat >>conftest.$ac_ext <<_ACEOF
 
 
                #include <linux/dcache.h>
+               struct vfsmount *d_automount(struct path *p) { return NULL; }
+               struct dentry_operations dops __attribute__ ((unused)) = {
+                       .d_automount = d_automount,
+               };
 
 int
 main (void)
 {
 
-               struct vfsmount *(*d_automount) (struct path *) = NULL;
-               struct dentry_operations dops __attribute__ ((unused)) = {
-                       .d_automount = d_automount,
-               };
 
   ;
   return 0;
@@ -23455,15 +24409,298 @@ $as_echo "no" >&6; }
 
 
 
-fi
+fi
+
+       rm -Rf build
+
+
+
+
+       { $as_echo "$as_me:$LINENO: checking whether eops->encode_fh() wants inode" >&5
+$as_echo_n "checking whether eops->encode_fh() wants inode... " >&6; }
+
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+               #include <linux/exportfs.h>
+               int encode_fh(struct inode *inode, __u32 *fh, int *max_len,
+                             struct inode *parent) { return 0; }
+               static struct export_operations eops __attribute__ ((unused))={
+                       .encode_fh = encode_fh,
+               };
+
+int
+main (void)
+{
+
+
+  ;
+  return 0;
+}
+
+_ACEOF
+
+
+       rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+       echo "obj-m := conftest.o" >build/Makefile
+       modpost_flag=''
+       test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+       if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+
+               { $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_ENCODE_FH_WITH_INODE 1
+_ACEOF
+
+
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+
+
+fi
+
+       rm -Rf build
+
+
+
+       { $as_echo "$as_me:$LINENO: checking whether clear_inode() is available" >&5
+$as_echo_n "checking whether clear_inode() is available... " >&6; }
+
+
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+               #include <linux/fs.h>
+
+int
+main (void)
+{
+
+               clear_inode(NULL);
+
+  ;
+  return 0;
+}
+
+_ACEOF
+
+
+       rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+       echo "obj-m := conftest.o" >build/Makefile
+       modpost_flag=''
+       test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+       if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
+fi
+
+       rm -Rf build
+
+
+       if test $rc -ne 0; then :
+
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+       else
+               if test "x$enable_linux_builtin" != xyes; then
+
+       grep -q -E '[[:space:]]clear_inode[[:space:]]' \
+               $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
+       rc=$?
+       if test $rc -ne 0; then
+               export=0
+               for file in fs/inode.c; do
+                       grep -q -E "EXPORT_SYMBOL.*(clear_inode)" \
+                               "$LINUX/$file" 2>/dev/null
+                       rc=$?
+                       if test $rc -eq 0; then
+                               export=1
+                               break;
+                       fi
+               done
+               if test $export -eq 0; then :
+                       rc=1
+               else :
+                       rc=0
+               fi
+       else :
+               rc=0
+       fi
+
+               fi
+               if test $rc -ne 0; then :
+
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+               else :
+
+               { $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_CLEAR_INODE 1
+_ACEOF
+
+
+               fi
+       fi
+
+
+       { $as_echo "$as_me:$LINENO: checking whether insert_inode_locked() is available" >&5
+$as_echo_n "checking whether insert_inode_locked() is available... " >&6; }
+
+
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+
+               #include <linux/fs.h>
+
+int
+main (void)
+{
+
+               insert_inode_locked(NULL);
+
+  ;
+  return 0;
+}
+
+_ACEOF
+
+
+       rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+       echo "obj-m := conftest.o" >build/Makefile
+       modpost_flag=''
+       test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+       if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
+fi
+
+       rm -Rf build
+
+
+       if test $rc -ne 0; then :
+
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+       else
+               if test "x$enable_linux_builtin" != xyes; then
+
+       grep -q -E '[[:space:]]insert_inode_locked[[:space:]]' \
+               $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
+       rc=$?
+       if test $rc -ne 0; then
+               export=0
+               for file in fs/inode.c; do
+                       grep -q -E "EXPORT_SYMBOL.*(insert_inode_locked)" \
+                               "$LINUX/$file" 2>/dev/null
+                       rc=$?
+                       if test $rc -eq 0; then
+                               export=1
+                               break;
+                       fi
+               done
+               if test $export -eq 0; then :
+                       rc=1
+               else :
+                       rc=0
+               fi
+       else :
+               rc=0
+       fi
+
+               fi
+               if test $rc -ne 0; then :
+
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+               else :
+
+               { $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_INSERT_INODE_LOCKED 1
+_ACEOF
 
-       rm -Rf build
 
+               fi
+       fi
 
 
+       { $as_echo "$as_me:$LINENO: checking whether d_make_root() is available" >&5
+$as_echo_n "checking whether d_make_root() is available... " >&6; }
 
-       { $as_echo "$as_me:$LINENO: checking whether eops->encode_fh() wants inode" >&5
-$as_echo_n "checking whether eops->encode_fh() wants inode... " >&6; }
 
 
 cat confdefs.h - <<_ACEOF >conftest.c
@@ -23474,17 +24711,13 @@ cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
 
 
-               #include <linux/exportfs.h>
-               int encode_fh(struct inode *inode, __u32 *fh, int *max_len,
-                             struct inode *parent) { return 0; }
-               static struct export_operations eops __attribute__ ((unused))={
-                       .encode_fh = encode_fh,
-               };
+               #include <linux/dcache.h>
 
 int
 main (void)
 {
 
+               d_make_root(NULL);
 
   ;
   return 0;
@@ -23508,22 +24741,11 @@ _ACEOF
   ac_status=$?
   $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
   (exit $ac_status); }; }; then
-
-               { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
-
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_ENCODE_FH_WITH_INODE 1
-_ACEOF
-
-
+  rc=0
 else
   $as_echo "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
-
-               { $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
-
+ rc=1
 
 
 fi
@@ -23531,312 +24753,362 @@ fi
        rm -Rf build
 
 
+       if test $rc -ne 0; then :
 
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-       { $as_echo "$as_me:$LINENO: checking whether symbol clear_inode is exported" >&5
-$as_echo_n "checking whether symbol clear_inode is exported... " >&6; }
-       grep -q -E '[[:space:]]clear_inode[[:space:]]' \
+       else
+               if test "x$enable_linux_builtin" != xyes; then
+
+       grep -q -E '[[:space:]]d_make_root[[:space:]]' \
                $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
        rc=$?
        if test $rc -ne 0; then
-
                export=0
-               for file in fs/inode.c; do
-                       grep -q -E "EXPORT_SYMBOL.*(clear_inode)" "$LINUX/$file" 2>/dev/null
+               for file in fs/dcache.c; do
+                       grep -q -E "EXPORT_SYMBOL.*(d_make_root)" \
+                               "$LINUX/$file" 2>/dev/null
                        rc=$?
                        if test $rc -eq 0; then
-
                                export=1
                                break;
-
-fi
-
+                       fi
                done
-               if test $export -eq 0; then
-
-                       { $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
-
-
-else
-
-                       { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
-
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_CLEAR_INODE 1
-_ACEOF
-
+               if test $export -eq 0; then :
+                       rc=1
+               else :
+                       rc=0
+               fi
+       else :
+               rc=0
+       fi
 
-fi
+               fi
+               if test $rc -ne 0; then :
 
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+               else :
 
                { $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
 
 cat >>confdefs.h <<\_ACEOF
-#define HAVE_CLEAR_INODE 1
+#define HAVE_D_MAKE_ROOT 1
 _ACEOF
 
 
-fi
-
-
+               fi
+       fi
 
 
-       { $as_echo "$as_me:$LINENO: checking whether symbol insert_inode_locked is exported" >&5
-$as_echo_n "checking whether symbol insert_inode_locked is exported... " >&6; }
-       grep -q -E '[[:space:]]insert_inode_locked[[:space:]]' \
-               $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
-       rc=$?
-       if test $rc -ne 0; then
+       { $as_echo "$as_me:$LINENO: checking whether d_obtain_alias() is available" >&5
+$as_echo_n "checking whether d_obtain_alias() is available... " >&6; }
 
-               export=0
-               for file in fs/inode.c; do
-                       grep -q -E "EXPORT_SYMBOL.*(insert_inode_locked)" "$LINUX/$file" 2>/dev/null
-                       rc=$?
-                       if test $rc -eq 0; then
 
-                               export=1
-                               break;
 
-fi
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
 
-               done
-               if test $export -eq 0; then
 
-                       { $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
+               #include <linux/dcache.h>
 
+int
+main (void)
+{
 
-else
+               d_obtain_alias(NULL);
 
-                       { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
+  ;
+  return 0;
+}
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_INSERT_INODE_LOCKED 1
 _ACEOF
 
 
-fi
-
-
+       rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+       echo "obj-m := conftest.o" >build/Makefile
+       modpost_flag=''
+       test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+       if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
 else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
 
-               { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_INSERT_INODE_LOCKED 1
-_ACEOF
+fi
 
+       rm -Rf build
 
-fi
 
+       if test $rc -ne 0; then :
 
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
+       else
+               if test "x$enable_linux_builtin" != xyes; then
 
-       { $as_echo "$as_me:$LINENO: checking whether symbol d_make_root is exported" >&5
-$as_echo_n "checking whether symbol d_make_root is exported... " >&6; }
-       grep -q -E '[[:space:]]d_make_root[[:space:]]' \
+       grep -q -E '[[:space:]]d_obtain_alias[[:space:]]' \
                $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
        rc=$?
        if test $rc -ne 0; then
-
                export=0
                for file in fs/dcache.c; do
-                       grep -q -E "EXPORT_SYMBOL.*(d_make_root)" "$LINUX/$file" 2>/dev/null
+                       grep -q -E "EXPORT_SYMBOL.*(d_obtain_alias)" \
+                               "$LINUX/$file" 2>/dev/null
                        rc=$?
                        if test $rc -eq 0; then
-
                                export=1
                                break;
-
-fi
-
+                       fi
                done
-               if test $export -eq 0; then
-
-                       { $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
-
-
-else
-
-                       { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
-
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_D_MAKE_ROOT 1
-_ACEOF
-
+               if test $export -eq 0; then :
+                       rc=1
+               else :
+                       rc=0
+               fi
+       else :
+               rc=0
+       fi
 
-fi
+               fi
+               if test $rc -ne 0; then :
 
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+               else :
 
                { $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
 
 cat >>confdefs.h <<\_ACEOF
-#define HAVE_D_MAKE_ROOT 1
+#define HAVE_D_OBTAIN_ALIAS 1
 _ACEOF
 
 
-fi
-
-
+               fi
+       fi
 
 
-       { $as_echo "$as_me:$LINENO: checking whether symbol d_obtain_alias is exported" >&5
-$as_echo_n "checking whether symbol d_obtain_alias is exported... " >&6; }
-       grep -q -E '[[:space:]]d_obtain_alias[[:space:]]' \
-               $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
-       rc=$?
-       if test $rc -ne 0; then
+       { $as_echo "$as_me:$LINENO: checking whether check_disk_size_change() is available" >&5
+$as_echo_n "checking whether check_disk_size_change() is available... " >&6; }
 
-               export=0
-               for file in fs/dcache.c; do
-                       grep -q -E "EXPORT_SYMBOL.*(d_obtain_alias)" "$LINUX/$file" 2>/dev/null
-                       rc=$?
-                       if test $rc -eq 0; then
 
-                               export=1
-                               break;
 
-fi
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
 
-               done
-               if test $export -eq 0; then
 
-                       { $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
+               #include <linux/fs.h>
 
+int
+main (void)
+{
 
-else
+               check_disk_size_change(NULL, NULL);
 
-                       { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
+  ;
+  return 0;
+}
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_D_OBTAIN_ALIAS 1
 _ACEOF
 
 
-fi
-
-
+       rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+       echo "obj-m := conftest.o" >build/Makefile
+       modpost_flag=''
+       test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+       if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
 else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
 
-               { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_D_OBTAIN_ALIAS 1
-_ACEOF
+fi
 
+       rm -Rf build
 
-fi
 
+       if test $rc -ne 0; then :
 
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
+       else
+               if test "x$enable_linux_builtin" != xyes; then
 
-       { $as_echo "$as_me:$LINENO: checking whether symbol check_disk_size_change is exported" >&5
-$as_echo_n "checking whether symbol check_disk_size_change is exported... " >&6; }
        grep -q -E '[[:space:]]check_disk_size_change[[:space:]]' \
                $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
        rc=$?
        if test $rc -ne 0; then
-
                export=0
                for file in fs/block_dev.c; do
-                       grep -q -E "EXPORT_SYMBOL.*(check_disk_size_change)" "$LINUX/$file" 2>/dev/null
+                       grep -q -E "EXPORT_SYMBOL.*(check_disk_size_change)" \
+                               "$LINUX/$file" 2>/dev/null
                        rc=$?
                        if test $rc -eq 0; then
-
                                export=1
                                break;
+                       fi
+               done
+               if test $export -eq 0; then :
+                       rc=1
+               else :
+                       rc=0
+               fi
+       else :
+               rc=0
+       fi
+
+               fi
+               if test $rc -ne 0; then :
+
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+               else :
+
+               { $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_CHECK_DISK_SIZE_CHANGE 1
+_ACEOF
 
-fi
 
-               done
-               if test $export -eq 0; then
+               fi
+       fi
 
-                       { $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
 
+       { $as_echo "$as_me:$LINENO: checking whether truncate_setsize() is available" >&5
+$as_echo_n "checking whether truncate_setsize() is available... " >&6; }
 
-else
 
-                       { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_CHECK_DISK_SIZE_CHANGE 1
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
 _ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
 
 
-fi
+               #include <linux/mm.h>
 
+int
+main (void)
+{
 
-else
+               truncate_setsize(NULL, 0);
 
-               { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
+  ;
+  return 0;
+}
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_CHECK_DISK_SIZE_CHANGE 1
 _ACEOF
 
 
+       rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+       echo "obj-m := conftest.o" >build/Makefile
+       modpost_flag=''
+       test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+       if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
 fi
 
+       rm -Rf build
+
 
+       if test $rc -ne 0; then :
+
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
+       else
+               if test "x$enable_linux_builtin" != xyes; then
 
-       { $as_echo "$as_me:$LINENO: checking whether symbol truncate_setsize is exported" >&5
-$as_echo_n "checking whether symbol truncate_setsize is exported... " >&6; }
        grep -q -E '[[:space:]]truncate_setsize[[:space:]]' \
                $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
        rc=$?
        if test $rc -ne 0; then
-
                export=0
                for file in mm/truncate.c; do
-                       grep -q -E "EXPORT_SYMBOL.*(truncate_setsize)" "$LINUX/$file" 2>/dev/null
+                       grep -q -E "EXPORT_SYMBOL.*(truncate_setsize)" \
+                               "$LINUX/$file" 2>/dev/null
                        rc=$?
                        if test $rc -eq 0; then
-
                                export=1
                                break;
-
-fi
-
+                       fi
                done
-               if test $export -eq 0; then
-
-                       { $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
-
-
-else
-
-                       { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
-
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_TRUNCATE_SETSIZE 1
-_ACEOF
-
+               if test $export -eq 0; then :
+                       rc=1
+               else :
+                       rc=0
+               fi
+       else :
+               rc=0
+       fi
 
-fi
+               fi
+               if test $rc -ne 0; then :
 
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
 
-else
+               else :
 
                { $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
@@ -23846,8 +25118,8 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
-
+               fi
+       fi
 
 
 
@@ -24002,46 +25274,99 @@ fi
 
        EXTRA_KCFLAGS="$tmp_flags"
 
+       { $as_echo "$as_me:$LINENO: checking whether mount_nodev() is available" >&5
+$as_echo_n "checking whether mount_nodev() is available... " >&6; }
 
-       { $as_echo "$as_me:$LINENO: checking whether symbol mount_nodev is exported" >&5
-$as_echo_n "checking whether symbol mount_nodev is exported... " >&6; }
-       grep -q -E '[[:space:]]mount_nodev[[:space:]]' \
-               $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
-       rc=$?
-       if test $rc -ne 0; then
-
-               export=0
-               for file in fs/super.c; do
-                       grep -q -E "EXPORT_SYMBOL.*(mount_nodev)" "$LINUX/$file" 2>/dev/null
-                       rc=$?
-                       if test $rc -eq 0; then
 
-                               export=1
-                               break;
 
-fi
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
 
-               done
-               if test $export -eq 0; then
 
-                       { $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
+               #include <linux/fs.h>
 
+int
+main (void)
+{
 
-else
+               mount_nodev(NULL, 0, NULL, NULL);
 
-                       { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
+  ;
+  return 0;
+}
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_MOUNT_NODEV 1
 _ACEOF
 
 
+       rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+       echo "obj-m := conftest.o" >build/Makefile
+       modpost_flag=''
+       test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+       if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
 fi
 
+       rm -Rf build
 
-else
+
+       if test $rc -ne 0; then :
+
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+       else
+               if test "x$enable_linux_builtin" != xyes; then
+
+       grep -q -E '[[:space:]]mount_nodev[[:space:]]' \
+               $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
+       rc=$?
+       if test $rc -ne 0; then
+               export=0
+               for file in fs/super.c; do
+                       grep -q -E "EXPORT_SYMBOL.*(mount_nodev)" \
+                               "$LINUX/$file" 2>/dev/null
+                       rc=$?
+                       if test $rc -eq 0; then
+                               export=1
+                               break;
+                       fi
+               done
+               if test $export -eq 0; then :
+                       rc=1
+               else :
+                       rc=0
+               fi
+       else :
+               rc=0
+       fi
+
+               fi
+               if test $rc -ne 0; then :
+
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+               else :
 
                { $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
@@ -24051,8 +25376,8 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
-
+               fi
+       fi
 
 
 
@@ -24197,46 +25522,99 @@ fi
 
 
 
+       { $as_echo "$as_me:$LINENO: checking whether bdi_setup_and_register() is available" >&5
+$as_echo_n "checking whether bdi_setup_and_register() is available... " >&6; }
 
-       { $as_echo "$as_me:$LINENO: checking whether symbol bdi_setup_and_register is exported" >&5
-$as_echo_n "checking whether symbol bdi_setup_and_register is exported... " >&6; }
-       grep -q -E '[[:space:]]bdi_setup_and_register[[:space:]]' \
-               $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
-       rc=$?
-       if test $rc -ne 0; then
-
-               export=0
-               for file in mm/backing-dev.c; do
-                       grep -q -E "EXPORT_SYMBOL.*(bdi_setup_and_register)" "$LINUX/$file" 2>/dev/null
-                       rc=$?
-                       if test $rc -eq 0; then
 
-                               export=1
-                               break;
 
-fi
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
 
-               done
-               if test $export -eq 0; then
 
-                       { $as_echo "$as_me:$LINENO: result: no" >&5
-$as_echo "no" >&6; }
+               #include <linux/backing-dev.h>
 
+int
+main (void)
+{
 
-else
+               bdi_setup_and_register(NULL, NULL, 0);
 
-                       { $as_echo "$as_me:$LINENO: result: yes" >&5
-$as_echo "yes" >&6; }
+  ;
+  return 0;
+}
 
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_BDI_SETUP_AND_REGISTER 1
 _ACEOF
 
 
+       rm -Rf build && mkdir -p build && touch build/conftest.mod.c
+       echo "obj-m := conftest.o" >build/Makefile
+       modpost_flag=''
+       test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
+       if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  rc=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+ rc=1
+
+
 fi
 
+       rm -Rf build
+
 
-else
+       if test $rc -ne 0; then :
+
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+       else
+               if test "x$enable_linux_builtin" != xyes; then
+
+       grep -q -E '[[:space:]]bdi_setup_and_register[[:space:]]' \
+               $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
+       rc=$?
+       if test $rc -ne 0; then
+               export=0
+               for file in mm/backing-dev.c; do
+                       grep -q -E "EXPORT_SYMBOL.*(bdi_setup_and_register)" \
+                               "$LINUX/$file" 2>/dev/null
+                       rc=$?
+                       if test $rc -eq 0; then
+                               export=1
+                               break;
+                       fi
+               done
+               if test $export -eq 0; then :
+                       rc=1
+               else :
+                       rc=0
+               fi
+       else :
+               rc=0
+       fi
+
+               fi
+               if test $rc -ne 0; then :
+
+               { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+               else :
 
                { $as_echo "$as_me:$LINENO: result: yes" >&5
 $as_echo "yes" >&6; }
@@ -24246,8 +25624,8 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
 
-fi
-
+               fi
+       fi
 
 
 
@@ -25990,7 +27368,7 @@ $as_echo_n "checking whether dmu tx validation is enabled... " >&6; }
 $as_echo "$enable_debug_dmu_tx" >&6; }
 
 
-ac_config_files="$ac_config_files Makefile dracut/Makefile dracut/90zfs/Makefile udev/Makefile udev/rules.d/Makefile etc/Makefile etc/init.d/Makefile etc/zfs/Makefile man/Makefile man/man5/Makefile man/man8/Makefile lib/Makefile lib/libspl/Makefile lib/libspl/asm-generic/Makefile lib/libspl/asm-i386/Makefile lib/libspl/asm-x86_64/Makefile lib/libspl/include/Makefile lib/libspl/include/ia32/Makefile lib/libspl/include/ia32/sys/Makefile lib/libspl/include/rpc/Makefile lib/libspl/include/sys/Makefile lib/libspl/include/sys/sysevent/Makefile lib/libspl/include/sys/dktp/Makefile lib/libspl/include/util/Makefile lib/libavl/Makefile lib/libefi/Makefile lib/libnvpair/Makefile lib/libunicode/Makefile lib/libuutil/Makefile lib/libzpool/Makefile lib/libzfs/Makefile lib/libshare/Makefile cmd/Makefile cmd/zdb/Makefile cmd/zfs/Makefile cmd/zinject/Makefile cmd/zpool/Makefile cmd/ztest/Makefile cmd/zpios/Makefile cmd/mount_zfs/Makefile cmd/zpool_layout/Makefile cmd/zvol_id/Makefile cmd/zpool_id/Makefile cmd/vdev_id/Makefile module/Makefile module/avl/Makefile module/nvpair/Makefile module/unicode/Makefile module/zcommon/Makefile module/zfs/Makefile module/zpios/Makefile include/Makefile include/linux/Makefile include/sys/Makefile include/sys/fs/Makefile include/sys/fm/Makefile include/sys/fm/fs/Makefile scripts/Makefile scripts/zpios-profile/Makefile scripts/zpios-test/Makefile scripts/zpool-config/Makefile scripts/zpool-layout/Makefile scripts/common.sh zfs.spec zfs-modules.spec PKGBUILD-zfs PKGBUILD-zfs-modules zfs-script-config.sh zfs.release"
+ac_config_files="$ac_config_files Makefile dracut/Makefile dracut/90zfs/Makefile udev/Makefile udev/rules.d/Makefile etc/Makefile etc/init.d/Makefile etc/zfs/Makefile man/Makefile man/man5/Makefile man/man8/Makefile lib/Makefile lib/libspl/Makefile lib/libspl/asm-generic/Makefile lib/libspl/asm-i386/Makefile lib/libspl/asm-x86_64/Makefile lib/libspl/include/Makefile lib/libspl/include/ia32/Makefile lib/libspl/include/ia32/sys/Makefile lib/libspl/include/rpc/Makefile lib/libspl/include/sys/Makefile lib/libspl/include/sys/sysevent/Makefile lib/libspl/include/sys/dktp/Makefile lib/libspl/include/util/Makefile lib/libavl/Makefile lib/libefi/Makefile lib/libnvpair/Makefile lib/libunicode/Makefile lib/libuutil/Makefile lib/libzpool/Makefile lib/libzfs/Makefile lib/libshare/Makefile cmd/Makefile cmd/zdb/Makefile cmd/zfs/Makefile cmd/zinject/Makefile cmd/zpool/Makefile cmd/ztest/Makefile cmd/zpios/Makefile cmd/mount_zfs/Makefile cmd/zpool_layout/Makefile cmd/zvol_id/Makefile cmd/zpool_id/Makefile cmd/vdev_id/Makefile module/Makefile module/avl/Makefile module/nvpair/Makefile module/unicode/Makefile module/zcommon/Makefile module/zfs/Makefile module/zpios/Makefile include/Makefile include/linux/Makefile include/sys/Makefile include/sys/fs/Makefile include/sys/fm/Makefile include/sys/fm/fs/Makefile scripts/Makefile scripts/zpios-profile/Makefile scripts/zpios-test/Makefile scripts/zpool-config/Makefile scripts/zpool-layout/Makefile scripts/common.sh zfs.spec zfs-modules.spec PKGBUILD-zfs PKGBUILD-zfs-modules zfs-script-config.sh zfs.release dkms.conf"
 
 
 cat >confcache <<\_ACEOF
@@ -26975,6 +28353,7 @@ do
     "PKGBUILD-zfs-modules") CONFIG_FILES="$CONFIG_FILES PKGBUILD-zfs-modules" ;;
     "zfs-script-config.sh") CONFIG_FILES="$CONFIG_FILES zfs-script-config.sh" ;;
     "zfs.release") CONFIG_FILES="$CONFIG_FILES zfs.release" ;;
+    "dkms.conf") CONFIG_FILES="$CONFIG_FILES dkms.conf" ;;
 
   *) { { $as_echo "$as_me:$LINENO: error: invalid argument: $ac_config_target" >&5
 $as_echo "$as_me: error: invalid argument: $ac_config_target" >&2;}