btrfs: sink gfp parameter to set_extent_defrag

Single caller passes GFP_NOFS.

Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/extent_io.h

@@ -299,11 +299,11 @@ static inline int set_extent_delalloc(struct extent_io_tree *tree, u64 start,
 }
 
 static inline int set_extent_defrag(struct extent_io_tree *tree, u64 start,
-		u64 end, struct extent_state **cached_state, gfp_t mask)
+		u64 end, struct extent_state **cached_state)
 {
 	return set_extent_bit(tree, start, end,
 			      EXTENT_DELALLOC | EXTENT_UPTODATE | EXTENT_DEFRAG,
-			      NULL, cached_state, mask);
+			      NULL, cached_state, GFP_NOFS);
 }
 
 static inline int set_extent_new(struct extent_io_tree *tree, u64 start,