btrfs: make wait_on_extent_buffer_writeback() static inline

The simple helper can be inlined, no need for the separate function.

Reviewed-by: Johannes Thumshirn <[email protected]>
Reviewed-by: Anand Jain <[email protected]>
Signed-off-by: David Sterba <[email protected]>

Author: kdave

fs/btrfs/extent_io.c

@@ -1519,12 +1519,6 @@ static int extent_writepage(struct folio *folio, struct btrfs_bio_ctrl *bio_ctrl
 	return ret;
 }
 
-void wait_on_extent_buffer_writeback(struct extent_buffer *eb)
-{
-	wait_on_bit_io(&eb->bflags, EXTENT_BUFFER_WRITEBACK,
-		       TASK_UNINTERRUPTIBLE);
-}
-
 /*
  * Lock extent buffer status and pages for writeback.
  *

fs/btrfs/extent_io.h

@@ -266,7 +266,12 @@ void free_extent_buffer_stale(struct extent_buffer *eb);
 #define WAIT_PAGE_LOCK	2
 int read_extent_buffer_pages(struct extent_buffer *eb, int wait, int mirror_num,
 			     const struct btrfs_tree_parent_check *parent_check);
-void wait_on_extent_buffer_writeback(struct extent_buffer *eb);
+static inline void wait_on_extent_buffer_writeback(struct extent_buffer *eb)
+{
+	wait_on_bit_io(&eb->bflags, EXTENT_BUFFER_WRITEBACK,
+		       TASK_UNINTERRUPTIBLE);
+}
+
 void btrfs_readahead_tree_block(struct btrfs_fs_info *fs_info,
 				u64 bytenr, u64 owner_root, u64 gen, int level);
 void btrfs_readahead_node_child(struct extent_buffer *node, int slot);