mirror_zfs/config/kernel-blkdev-get-by-path.m4

dnl #
dnl # 2.6.38 API change
dnl # open_bdev_exclusive() changed to blkdev_get_by_path()
dnl # close_bdev_exclusive() changed to blkdev_put()
dnl #
AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_GET_BY_PATH],
	[AC_MSG_CHECKING([whether blkdev_get_by_path() is available])
	ZFS_LINUX_TRY_COMPILE_SYMBOL([
		#include <linux/fs.h>
	], [
		blkdev_get_by_path(NULL, 0, NULL);
	], [blkdev_get_by_path], [fs/block_dev.c], [
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_BLKDEV_GET_BY_PATH, 1,
		          [blkdev_get_by_path() is available])
	], [
		AC_MSG_RESULT(no)
	])
])
Linux 2.6.38 compat, blkdev_get_by_path() The open_bdev_exclusive() function has been replaced (again) by the more generic blkdev_get_by_path() function. Additionally, the counterpart function close_bdev_exclusive() has been replaced by blkdev_put(). Because these functions are more generic versions of the functions they replaced the compatibility macro must add the FMODE_EXCL mask to ensure they are exclusive. Closes #114 2011-02-23 01:55:35 +03:00			`dnl #`
			`dnl # 2.6.38 API change`
			`dnl # open_bdev_exclusive() changed to blkdev_get_by_path()`
			`dnl # close_bdev_exclusive() changed to blkdev_put()`
			`dnl #`
When checking for symbol exports, try compiling. This patch adds a new autoconf function: ZFS_LINUX_TRY_COMPILE_SYMBOL. This new function does the following: - Call LINUX_TRY_COMPILE with the specified parameters. - If unsuccessful, return false. - If successful and we're configuring with --enable-linux-builtin, return true. - Else, call CHECK_SYMBOL_EXPORT with the specified parameters and return the result. All calls to CHECK_SYMBOL_EXPORT are converted to LINUX_TRY_COMPILE_SYMBOL so that the tests work even when configuring for builtin on a kernel which doesn't have loadable module support, or hasn't been built yet. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Issue #851 2012-07-26 01:38:58 +04:00			`AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_GET_BY_PATH],`
			`[AC_MSG_CHECKING([whether blkdev_get_by_path() is available])`
			`ZFS_LINUX_TRY_COMPILE_SYMBOL([`
			`#include <linux/fs.h>`
			`], [`
			`blkdev_get_by_path(NULL, 0, NULL);`
			`], [blkdev_get_by_path], [fs/block_dev.c], [`
			`AC_MSG_RESULT(yes)`
			`AC_DEFINE(HAVE_BLKDEV_GET_BY_PATH, 1,`
			`[blkdev_get_by_path() is available])`
			`], [`
			`AC_MSG_RESULT(no)`
			`])`
Linux 2.6.38 compat, blkdev_get_by_path() The open_bdev_exclusive() function has been replaced (again) by the more generic blkdev_get_by_path() function. Additionally, the counterpart function close_bdev_exclusive() has been replaced by blkdev_put(). Because these functions are more generic versions of the functions they replaced the compatibility macro must add the FMODE_EXCL mask to ensure they are exclusive. Closes #114 2011-02-23 01:55:35 +03:00			`])`