freebsd-nq/config/kernel-rq-for-each_segment.m4
Chunwei Chen b761912b34 Linux 3.14 compat: rq_for_each_segment in dmu_req_copy
rq_for_each_segment changed from taking bio_vec * to taking bio_vec.
We provide rq_for_each_segment4 which takes both.

Signed-off-by: Chunwei Chen <tuxoko@gmail.com>
Signed-off-by: Richard Yao <ryao@gentoo.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #2124
2014-04-10 14:28:51 -07:00

48 lines
1.2 KiB
Plaintext

dnl #
dnl # 2.6.x API change
dnl #
dnl # 3.14 API change
dnl #
AC_DEFUN([ZFS_AC_KERNEL_RQ_FOR_EACH_SEGMENT], [
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="${NO_UNUSED_BUT_SET_VARIABLE}"
AC_MSG_CHECKING([whether rq_for_each_segment() wants bio_vec *])
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_DEFINE(HAVE_RQ_FOR_EACH_SEGMENT_BVP, 1,
[rq_for_each_segment() wants bio_vec *])
],[
AC_MSG_RESULT(no)
])
AC_MSG_CHECKING([whether rq_for_each_segment() wants bio_vec])
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_DEFINE(HAVE_RQ_FOR_EACH_SEGMENT_BV, 1,
[rq_for_each_segment() wants bio_vec])
],[
AC_MSG_RESULT(no)
])
EXTRA_KCFLAGS="$tmp_flags"
])