X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=config%2Fkernel-bio-rw-syncio.m4;h=4bff80a8f863d057c1b31d8d633be91c2d84f1e9;hb=a36bf1149d7408fde273851350c0ef6c0e4fe989;hp=2c80f5c0ea614222a5d4728e09444e343b6380c3;hpb=c9c0d073da561bcbefbdf09c87fc75b227415619;p=zfs.git

diff --git a/config/kernel-bio-rw-syncio.m4 b/config/kernel-bio-rw-syncio.m4
index 2c80f5c..4bff80a 100644
--- a/config/kernel-bio-rw-syncio.m4
+++ b/config/kernel-bio-rw-syncio.m4
@@ -1,18 +1,49 @@
 dnl #
-dnl # 2.6.29 API change
-dnl # BIO_RW_SYNC renamed to BIO_RW_SYNCIO
+dnl # Preferred interface for flagging a synchronous bio:
+dnl # 2.6.12-2.6.29: BIO_RW_SYNC
+dnl # 2.6.30-2.6.35: BIO_RW_SYNCIO
+dnl # 2.6.36-2.6.xx: REQ_SYNC
 dnl #
+AC_DEFUN([ZFS_AC_KERNEL_BIO_RW_SYNC], [
+	AC_MSG_CHECKING([whether BIO_RW_SYNC is defined])
+	ZFS_LINUX_TRY_COMPILE([
+		#include <linux/bio.h>
+	],[
+		int flags __attribute__ ((unused));
+		flags = BIO_RW_SYNC;
+	],[
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_BIO_RW_SYNC, 1, [BIO_RW_SYNC is defined])
+	],[
+		AC_MSG_RESULT(no)
+	])
+])
+
 AC_DEFUN([ZFS_AC_KERNEL_BIO_RW_SYNCIO], [
 	AC_MSG_CHECKING([whether BIO_RW_SYNCIO is defined])
 	ZFS_LINUX_TRY_COMPILE([
 		#include <linux/bio.h>
 	],[
-		int flags;
+		int flags __attribute__ ((unused));
 		flags = BIO_RW_SYNCIO;
 	],[
 		AC_MSG_RESULT(yes)
-		AC_DEFINE(HAVE_BIO_RW_SYNCIO, 1,
-		          [BIO_RW_SYNCIO is defined])
+		AC_DEFINE(HAVE_BIO_RW_SYNCIO, 1, [BIO_RW_SYNCIO is defined])
+	],[
+		AC_MSG_RESULT(no)
+	])
+])
+
+AC_DEFUN([ZFS_AC_KERNEL_REQ_SYNC], [
+	AC_MSG_CHECKING([whether REQ_SYNC is defined])
+	ZFS_LINUX_TRY_COMPILE([
+		#include <linux/bio.h>
+	],[
+		int flags __attribute__ ((unused));
+		flags = REQ_SYNC;
+	],[
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_REQ_SYNC, 1, [REQ_SYNC is defined])
 	],[
 		AC_MSG_RESULT(no)
 	])