+ #include <linux/fs.h>
+
+int
+main (void)
+{
+
+ struct super_block sb __attribute__ ((unused));
+ sb.s_bdi = 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_BDI 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:$LINENO: checking whether bdi_setup_and_register() is available" >&5
+$as_echo_n "checking whether bdi_setup_and_register() 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/backing-dev.h>
+
+int
+main (void)
+{
+
+ bdi_setup_and_register(NULL, 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
+
+ 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; }
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_BDI_SETUP_AND_REGISTER 1
+_ACEOF
+
+
+ fi
+ fi
+
+
+
+ { $as_echo "$as_me:$LINENO: checking whether set_nlink() is available" >&5
+$as_echo_n "checking whether set_nlink() 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)
+{
+
+ struct inode node;
+ unsigned int link = 0;
+ (void) set_nlink(&node, link);
+
+ ;
+ 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_SET_NLINK 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
+
+
+
+
+ if test "$LINUX_OBJ" != "$LINUX"; then
+
+ KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
+
+fi
+
+
+
+
+ KERNELCPPFLAGS="$KERNELCPPFLAGS $NO_UNUSED_BUT_SET_VARIABLE"
+ KERNELCPPFLAGS="$KERNELCPPFLAGS -DHAVE_SPL -D_KERNEL"
+ KERNELCPPFLAGS="$KERNELCPPFLAGS -DTEXT_DOMAIN=\\\"zfs-linux-kernel\\\""
+
+
+ ;;
+ user)
+
+
+# Check whether --with-udevdir was given.
+if test "${with_udevdir+set}" = set; then
+ withval=$with_udevdir; udevdir=$withval
+else
+ udevdir='${exec_prefix}/lib/udev'
+fi
+
+
+
+# Check whether --with-udevruledir was given.
+if test "${with_udevruledir+set}" = set; then
+ withval=$with_udevruledir; udevruledir=$withval
+else
+ udevruledir='${udevdir}/rules.d'
+fi
+
+
+
+
+
+
+ { $as_echo "$as_me:$LINENO: checking for target asm dir" >&5
+$as_echo_n "checking for target asm dir... " >&6; }
+ TARGET_ARCH=`echo ${target_cpu} | sed -e s/i.86/i386/`
+
+ case $TARGET_ARCH in
+ i386|x86_64)
+ TARGET_ASM_DIR=asm-${TARGET_ARCH}
+ ;;
+ *)
+ TARGET_ASM_DIR=asm-generic
+ ;;
+ esac
+
+
+ { $as_echo "$as_me:$LINENO: result: $TARGET_ASM_DIR" >&5
+$as_echo "$TARGET_ASM_DIR" >&6; }
+
+
+ { $as_echo "$as_me:$LINENO: checking for ioctl()" >&5
+$as_echo_n "checking for ioctl()... " >&6; }
+ cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h. */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h. */
+#include <unistd.h>
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+ $EGREP "ioctl" >/dev/null 2>&1; then
+ is_unistd=yes
+else
+ is_unistd=no
+fi
+rm -f conftest*
+
+ cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h. */
+_ACEOF