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Diffstat (limited to 'config/kernel-discard-granularity.m4')
| -rw-r--r-- | config/kernel-discard-granularity.m4 | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/config/kernel-discard-granularity.m4 b/config/kernel-discard-granularity.m4 new file mode 100644 index 000000000..2c677c909 --- /dev/null +++ b/config/kernel-discard-granularity.m4 @@ -0,0 +1,20 @@ +dnl # +dnl # 2.6.33 API change +dnl # Discard granularity and alignment restrictions may now be set. +dnl # +AC_DEFUN([ZFS_AC_KERNEL_DISCARD_GRANULARITY], [ + AC_MSG_CHECKING([whether ql->discard_granularity is available]) + ZFS_LINUX_TRY_COMPILE([ + #include <linux/blkdev.h> + ],[ + struct queue_limits ql __attribute__ ((unused)); + + ql.discard_granularity = 0; + ],[ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_DISCARD_GRANULARITY, 1, + [ql->discard_granularity is available]) + ],[ + AC_MSG_RESULT(no) + ]) +]) |