config/kernel-blk-rq-pos.m4

   1 dnl #
   2 dnl # 2.6.31 API change
   3 dnl #
   4 AC_DEFUN([ZFS_AC_KERNEL_BLK_RQ_POS], [
   5         AC_MSG_CHECKING([whether blk_rq_pos() is available])
   6         tmp_flags="$EXTRA_KCFLAGS"
   7         EXTRA_KCFLAGS="-Wno-unused-but-set-variable"
   8         ZFS_LINUX_TRY_COMPILE([
   9                 #include <linux/blkdev.h>
  10         ],[
  11                 struct request *req = NULL;
  12                 (void) blk_rq_pos(req);
  13         ],[
  14                 AC_MSG_RESULT(yes)
  15                 AC_DEFINE(HAVE_BLK_RQ_POS, 1,
  16                           [blk_rq_pos() is available])
  17         ],[
  18                 AC_MSG_RESULT(no)
  19         ])
  20         EXTRA_KCFLAGS="$tmp_flags"
  21 ])