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Linux 3.14 compat: rq_for_each_segment in dmu_req_copy

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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
This commit is contained in:
Chunwei Chen
2014-03-29 20:26:17 +08:00
committed by Brian Behlendorf
parent 22760eebef
commit b761912b34
3 changed files with 56 additions and 8 deletions
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config/kernel-rq-for-each_segment.m4
+25 -1
View File
@@ -1,10 +1,13 @@
dnl #
dnl # 2.6.x API change
dnl #
dnl # 3.14 API change
dnl #
AC_DEFUN([ZFS_AC_KERNEL_RQ_FOR_EACH_SEGMENT], [
AC_MSG_CHECKING([whether rq_for_each_segment() is available])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="${NO_UNUSED_BUT_SET_VARIABLE}"
AC_MSG_CHECKING([whether rq_for_each_segment() wants bio_vec *])
ZFS_LINUX_TRY_COMPILE([
#include <linux/blkdev.h>
],[
@@ -16,8 +19,29 @@ AC_DEFUN([ZFS_AC_KERNEL_RQ_FOR_EACH_SEGMENT], [
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"
])