btrfs: drop gfp mask tweaking in try_release_extent_state

try_release_extent_state reduces the gfp mask to GFP_NOFS if it is
compatible. This is true for GFP_KERNEL as well. There is no real
reason to do that though. There is no new lock taken down the
the only consumer of the gfp mask which is
try_release_extent_state
  clear_extent_bit
    __clear_extent_bit
      alloc_extent_state

So this seems just unnecessary and confusing.

Signed-off-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 28a5a15..1297b63 100644 (file)
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -4269,8 +4269,6 @@ static int try_release_extent_state(struct extent_map_tree *map,
                           EXTENT_IOBITS, 0, NULL))
                ret = 0;
        else {
-               if ((mask & GFP_NOFS) == GFP_NOFS)
-                       mask = GFP_NOFS;
                /*
                 * at this point we can safely clear everything except the
                 * locked bit and the nodatasum bit