[mirror_zfs-debian.git] / config / kernel-bdev-logical-size.m4

dnl #
dnl # 2.6.30 API change
dnl # bdev_hardsect_size() replaced with bdev_logical_block_size().  While
dnl # it has been true for a while that there was no strict 1:1 mapping
dnl # between physical sector size and logical block size this change makes
dnl # it explicit.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_BDEV_LOGICAL_BLOCK_SIZE], [
	AC_MSG_CHECKING([whether bdev_logical_block_size() is available])
	ZFS_LINUX_TRY_COMPILE([
		#include <linux/blkdev.h>
	],[
		struct block_device *bdev = NULL;
		bdev_logical_block_size(bdev);
	],[
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_BDEV_LOGICAL_BLOCK_SIZE, 1,
		          [bdev_logical_block_size() is available])
	],[
		AC_MSG_RESULT(no)
	])
])
Commit	Line	Data
c9c0d073 BB	1	dnl #
	2	dnl # 2.6.30 API change
	3	dnl # bdev_hardsect_size() replaced with bdev_logical_block_size(). While
	4	dnl # it has been true for a while that there was no strict 1:1 mapping
	5	dnl # between physical sector size and logical block size this change makes
	6	dnl # it explicit.
	7	dnl #
	8	AC_DEFUN([ZFS_AC_KERNEL_BDEV_LOGICAL_BLOCK_SIZE], [
	9	AC_MSG_CHECKING([whether bdev_logical_block_size() is available])
	10	ZFS_LINUX_TRY_COMPILE([
	11	#include <linux/blkdev.h>
	12	],[
	13	struct block_device *bdev = NULL;
	14	bdev_logical_block_size(bdev);
	15	],[
	16	AC_MSG_RESULT(yes)
	17	AC_DEFINE(HAVE_BDEV_LOGICAL_BLOCK_SIZE, 1,
	18	[bdev_logical_block_size() is available])
	19	],[
	20	AC_MSG_RESULT(no)
	21	])
	22	])