config/kernel-discard-granularity.m4

   1 dnl #
   2 dnl # 2.6.33 API change
   3 dnl # Discard granularity and alignment restrictions may now be set.
   4 dnl #
   5 AC_DEFUN([ZFS_AC_KERNEL_SRC_DISCARD_GRANULARITY], [
   6         ZFS_LINUX_TEST_SRC([discard_granularity], [
   7                 #include <linux/blkdev.h>
   8         ],[
   9                 struct queue_limits ql __attribute__ ((unused));
  10                 ql.discard_granularity = 0;
  11         ])
  12 ])
  13
  14 AC_DEFUN([ZFS_AC_KERNEL_DISCARD_GRANULARITY], [
  15         AC_MSG_CHECKING([whether ql->discard_granularity is available])
  16         ZFS_LINUX_TEST_RESULT([discard_granularity], [
  17                 AC_MSG_RESULT(yes)
  18         ],[
  19                 ZFS_LINUX_TEST_ERROR([ql->discard_granularity])
  20         ])
  21 ])