btrfs: drop gfp parameter from find_extent_buffer

pass GFP_NOFS directly to kmem_cache_alloc

Signed-off-by: David Sterba <dsterba@suse.cz>
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index e9cfe8d..ff220c3 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -263,8 +263,7 @@
 					  struct page *page0,
 					  gfp_t mask);
 struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree,
-					 u64 start, unsigned long len,
-					  gfp_t mask);
+					 u64 start, unsigned long len);
 void free_extent_buffer(struct extent_buffer *eb);
 int read_extent_buffer_pages(struct extent_io_tree *tree,
 			     struct extent_buffer *eb, u64 start, int wait,