[mirror_zfs.git] / config / kernel-discard-granularity.m4

dnl #
dnl # 2.6.33 API change
dnl # Discard granularity and alignment restrictions may now be set.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_DISCARD_GRANULARITY], [
	AC_MSG_CHECKING([whether ql->discard_granularity is available])
	ZFS_LINUX_TRY_COMPILE([
		#include <linux/blkdev.h>
	],[
		struct queue_limits ql __attribute__ ((unused));

		ql.discard_granularity = 0;
	],[
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_DISCARD_GRANULARITY, 1,
		          [ql->discard_granularity is available])
	],[
		AC_MSG_RESULT(no)
	])
])
Commit	Line	Data
ee5fd0bb ED	1	dnl #
	2	dnl # 2.6.33 API change
	3	dnl # Discard granularity and alignment restrictions may now be set.
	4	dnl #
	5	AC_DEFUN([ZFS_AC_KERNEL_DISCARD_GRANULARITY], [
	6	AC_MSG_CHECKING([whether ql->discard_granularity is available])
	7	ZFS_LINUX_TRY_COMPILE([
	8	#include <linux/blkdev.h>
	9	],[
	10	struct queue_limits ql __attribute__ ((unused));
	11
	12	ql.discard_granularity = 0;
	13	],[
	14	AC_MSG_RESULT(yes)
	15	AC_DEFINE(HAVE_DISCARD_GRANULARITY, 1,
	16	[ql->discard_granularity is available])
	17	],[
	18	AC_MSG_RESULT(no)
	19	])
	20	])