Merge commit 'refs/top-bases/linux-kernel-mem' into linux-kernel-mem

config/kernel-bio-args.m4

@@ -1,24 +0,0 @@
-dnl #
-dnl # 2.6.x API change
-dnl # bio_end_io_t uses 2 args (size was dropped from prototype)
-dnl #
-AC_DEFUN([ZFS_AC_CONFIG_KERNEL_BIO_ARGS],
-	[AC_MSG_CHECKING([whether bio_end_io_t wants 2 args])
-	tmp_flags="$EXTRA_KCFLAGS"
-	EXTRA_KCFLAGS="-Werror"
-	ZFS_LINUX_TRY_COMPILE([
-		#include <linux/bio.h>
-	],[
-		void (*wanted_end_io)(struct bio *, int) = NULL;
-		bio_end_io_t *local_end_io;
-
-		local_end_io = wanted_end_io;
-	],[
-		AC_MSG_RESULT(yes)
-		AC_DEFINE(HAVE_2ARGS_BIO_END_IO_T, 1,
-		          [bio_end_io_t wants 2 args])
-	],[
-		AC_MSG_RESULT(no)
-	])
-	EXTRA_KCFLAGS="$tmp_flags"
-])

config/kernel-bio-empty-barrier.m4

@@ -0,0 +1,20 @@
+dnl #
+dnl # 2.6.24 API change
+dnl # Empty write barriers are now supported and we should use them.
+dnl #
+AC_DEFUN([ZFS_AC_KERNEL_BIO_EMPTY_BARRIER], [
+	AC_MSG_CHECKING([whether bio_empty_barrier() is defined])
+	EXTRA_KCFLAGS="-Werror"
+	ZFS_LINUX_TRY_COMPILE([
+		#include <linux/bio.h>
+	],[
+		struct bio bio;
+		(void)bio_empty_barrier(&bio);
+	],[
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_BIO_EMPTY_BARRIER, 1,
+		          [bio_empy_barrier() is defined])
+	],[
+		AC_MSG_RESULT(no)
+	])
+])

config/kernel-bio-end-io-t-args.m4

@@ -0,0 +1,29 @@
+dnl #
+dnl # 2.6.24 API change
+dnl # Size argument dropped from bio_endio and bi_end_io, because the
+dnl # bi_end_io is only called once now when the request is complete.
+dnl # There is no longer any need for a size argument.  This also means
+dnl # that partial IO's are no longer possibe and the end_io callback
+dnl # should not check bi->bi_size.  Finally, the return type was updated
+dnl # to void.
+dnl #
+AC_DEFUN([ZFS_AC_KERNEL_BIO_END_IO_T_ARGS], [
+	AC_MSG_CHECKING([whether bio_end_io_t wants 2 args])
+	tmp_flags="$EXTRA_KCFLAGS"
+	EXTRA_KCFLAGS="-Werror"
+	ZFS_LINUX_TRY_COMPILE([
+		#include <linux/bio.h>
+	],[
+		void (*wanted_end_io)(struct bio *, int) = NULL;
+		bio_end_io_t *local_end_io;
+
+		local_end_io = wanted_end_io;
+	],[
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_2ARGS_BIO_END_IO_T, 1,
+		          [bio_end_io_t wants 2 args])
+	],[
+		AC_MSG_RESULT(no)
+	])
+	EXTRA_KCFLAGS="$tmp_flags"
+])

config/kernel-bio-rw-syncio.m4

@@ -0,0 +1,18 @@
+dnl #
+dnl # 2.6.29 API change
+dnl # BIO_RW_SYNC renamed to BIO_RW_SYNCIO
+dnl #
+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 = BIO_RW_SYNCIO;
+	],[
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_BIO_RW_SYNCIO, 1,
+		          [BIO_RW_SYNCIO is defined])
+	],[
+		AC_MSG_RESULT(no)
+	])
+])

config/kernel-invalidate-bdev-args.m4

@@ -0,0 +1,19 @@
+dnl #
+dnl # 2.6.22 API change
+dnl # Unused destroy_dirty_buffers arg removed from prototype.
+dnl #
+AC_DEFUN([ZFS_AC_KERNEL_INVALIDATE_BDEV_ARGS], [
+	AC_MSG_CHECKING([whether invalidate_bdev() wants 1 arg])
+	ZFS_LINUX_TRY_COMPILE([
+		#include <linux/buffer_head.h>
+	],[
+		struct block_device *bdev;
+		invalidate_bdev(bdev);
+	],[
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_1ARG_INVALIDATE_BDEV, 1,
+		          [invalidate_bdev() wants 1 arg])
+	],[
+		AC_MSG_RESULT(no)
+	])
+])

config/kernel-open-bdev-exclusive.m4

@@ -0,0 +1,12 @@
+dnl #
+dnl # 2.6.28 API change
+dnl # open/close_bdev_excl() renamed to open/close_bdev_exclusive()
+dnl #
+AC_DEFUN([ZFS_AC_KERNEL_OPEN_BDEV_EXCLUSIVE], [
+	ZFS_CHECK_SYMBOL_EXPORT(
+		[open_bdev_exclusive],
+		[fs/block_dev.c],
+		[AC_DEFINE(HAVE_OPEN_BDEV_EXCLUSIVE, 1,
+		[open_bdev_exclusive() is available])],
+		[])
+])

config/kernel.m4

@@ -4,7 +4,11 @@ dnl #
 AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
 	ZFS_AC_KERNEL
 	ZFS_AC_SPL
-	ZFS_AC_CONFIG_KERNEL_BIO_ARGS
+	ZFS_AC_KERNEL_OPEN_BDEV_EXCLUSIVE
+	ZFS_AC_KERNEL_INVALIDATE_BDEV_ARGS
+	ZFS_AC_KERNEL_BIO_END_IO_T_ARGS
+	ZFS_AC_KERNEL_BIO_RW_SYNCIO
+	ZFS_AC_KERNEL_BIO_EMPTY_BARRIER
 
 	dnl # Kernel build make options
 	dnl # KERNELMAKE_PARAMS="V=1"	# Enable verbose module build