[mirror_zfs-debian.git] / config / kernel-blk-fetch-request.m4

dnl #
dnl # 2.6.31 API change
dnl # Request queue peek/retrieval interface cleanup, the blk_fetch_request()
dnl # function replaces the elv_next_request() and blk_fetch_request()
dnl # functions.  The updated blk_fetch_request() function returns the
dnl # next available request and removed it from the request queue.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_BLK_FETCH_REQUEST], [
	AC_MSG_CHECKING([whether blk_fetch_request() is available])
	ZFS_LINUX_TRY_COMPILE([
		#include <linux/blkdev.h>
	],[
		struct request_queue *q = NULL;
		(void) blk_fetch_request(q);
	],[
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_BLK_FETCH_REQUEST, 1,
		          [blk_fetch_request() is available])
	],[
		AC_MSG_RESULT(no)
	])
])
Commit	Line	Data
c9c0d073 BB	1	dnl #
	2	dnl # 2.6.31 API change
	3	dnl # Request queue peek/retrieval interface cleanup, the blk_fetch_request()
	4	dnl # function replaces the elv_next_request() and blk_fetch_request()
	5	dnl # functions. The updated blk_fetch_request() function returns the
	6	dnl # next available request and removed it from the request queue.
	7	dnl #
	8	AC_DEFUN([ZFS_AC_KERNEL_BLK_FETCH_REQUEST], [
	9	AC_MSG_CHECKING([whether blk_fetch_request() is available])
	10	ZFS_LINUX_TRY_COMPILE([
	11	#include <linux/blkdev.h>
	12	],[
	13	struct request_queue *q = NULL;
	14	(void) blk_fetch_request(q);
	15	],[
	16	AC_MSG_RESULT(yes)
	17	AC_DEFINE(HAVE_BLK_FETCH_REQUEST, 1,
	18	[blk_fetch_request() is available])
	19	],[
	20	AC_MSG_RESULT(no)
	21	])
	22	])