4 AC_DEFUN([ZFS_AC_KERNEL_RQ_FOR_EACH_SEGMENT], [
5 AC_MSG_CHECKING([whether rq_for_each_segment() is available])
6 ZFS_LINUX_TRY_COMPILE([
7 #include <linux/blkdev.h>
10 struct req_iterator iter;
11 struct request *req = NULL;
12 rq_for_each_segment(bv, req, iter) { }
15 AC_DEFINE(HAVE_RQ_FOR_EACH_SEGMENT, 1,
16 [rq_for_each_segment() is available])