btrfs: fix comment for btrfs ordered extent flag bits

There is small error in comment about BTRFS_ORDERED_* flags, added in
commit 3c198fe06449 ("btrfs: rework the order of
btrfs_ordered_extent::flags") but the fixup did not get merged in time.

The 4 types are for ordered extent itself, not for direct io.
Only 3 types support direct io, REGULAR/NOCOW/PREALLOC.

Fix the comment to reflect that.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h
index 99e0853..e60c07f 100644 (file)
--- a/fs/btrfs/ordered-data.h
+++ b/fs/btrfs/ordered-data.h
@@ -39,8 +39,8 @@ struct btrfs_ordered_sum {
  */
 enum {
        /*
-        * Different types for direct io, one and only one of the 4 type can
-        * be set when creating ordered extent.
+        * Different types for ordered extents, one and only one of the 4 types
+        * need to be set when creating ordered extent.
         *
         * REGULAR:     For regular non-compressed COW write
         * NOCOW:       For NOCOW write into existing non-hole extent