[mirror_zfs-debian.git] / config / kernel-rq-for-each_segment.m4

dnl #
dnl # 2.6.x API change
dnl #
AC_DEFUN([ZFS_AC_KERNEL_RQ_FOR_EACH_SEGMENT], [
	AC_MSG_CHECKING([whether rq_for_each_segment() is available])
	tmp_flags="$EXTRA_KCFLAGS"
	EXTRA_KCFLAGS="-Wno-unused-but-set-variable"
	ZFS_LINUX_TRY_COMPILE([
		#include <linux/blkdev.h>
	],[
		struct bio_vec *bv;
		struct req_iterator iter;
		struct request *req = NULL;
		rq_for_each_segment(bv, req, iter) { }
	],[
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_RQ_FOR_EACH_SEGMENT, 1,
		          [rq_for_each_segment() is available])
	],[
		AC_MSG_RESULT(no)
	])
	EXTRA_KCFLAGS="$tmp_flags"
])
Commit	Line	Data
c9c0d073 BB	1	dnl #
	2	dnl # 2.6.x API change
	3	dnl #
	4	AC_DEFUN([ZFS_AC_KERNEL_RQ_FOR_EACH_SEGMENT], [
	5	AC_MSG_CHECKING([whether rq_for_each_segment() is available])
b9c59ec8 PS	6	tmp_flags="$EXTRA_KCFLAGS"
b9c59ec8 PS	7	EXTRA_KCFLAGS="-Wno-unused-but-set-variable"
c9c0d073 BB	8	ZFS_LINUX_TRY_COMPILE([
	9	#include <linux/blkdev.h>
	10	],[
	11	struct bio_vec *bv;
	12	struct req_iterator iter;
	13	struct request *req = NULL;
	14	rq_for_each_segment(bv, req, iter) { }
	15	],[
	16	AC_MSG_RESULT(yes)
	17	AC_DEFINE(HAVE_RQ_FOR_EACH_SEGMENT, 1,
	18	[rq_for_each_segment() is available])
	19	],[
	20	AC_MSG_RESULT(no)
	21	])
b9c59ec8	22	EXTRA_KCFLAGS="$tmp_flags"
c9c0d073	23	])