freebsd-dev/config/kernel-rq-for-each_segment.m4

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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])
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)
])
])