btrfs: pass the extent map tree's inode to clear_em_logging()

Extent maps are always associated to an inode's extent map tree, so
there's no need to pass the extent map tree explicitly to
clear_em_logging().

In order to facilitate an upcoming change that adds a shrinker for extent
maps, change clear_em_logging() to receive the inode instead of its extent
map tree.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/extent_map.c

@@ -331,8 +331,10 @@ int unpin_extent_cache(struct btrfs_inode *inode, u64 start, u64 len, u64 gen)
 
 }
 
-void clear_em_logging(struct extent_map_tree *tree, struct extent_map *em)
+void clear_em_logging(struct btrfs_inode *inode, struct extent_map *em)
 {
+	struct extent_map_tree *tree = &inode->extent_tree;
+
 	lockdep_assert_held_write(&tree->lock);
 
 	em->flags &= ~EXTENT_FLAG_LOGGING;

fs/btrfs/extent_map.h

@@ -129,7 +129,7 @@ void free_extent_map(struct extent_map *em);
 int __init extent_map_init(void);
 void __cold extent_map_exit(void);
 int unpin_extent_cache(struct btrfs_inode *inode, u64 start, u64 len, u64 gen);
-void clear_em_logging(struct extent_map_tree *tree, struct extent_map *em);
+void clear_em_logging(struct btrfs_inode *inode, struct extent_map *em);
 struct extent_map *search_extent_mapping(struct extent_map_tree *tree,
 					 u64 start, u64 len);
 int btrfs_add_extent_mapping(struct btrfs_inode *inode,

fs/btrfs/tree-log.c

@@ -4949,7 +4949,7 @@ static int btrfs_log_changed_extents(struct btrfs_trans_handle *trans,
 		 * private list.
 		 */
 		if (ret) {
-			clear_em_logging(tree, em);
+			clear_em_logging(inode, em);
 			free_extent_map(em);
 			continue;
 		}
@@ -4958,7 +4958,7 @@ static int btrfs_log_changed_extents(struct btrfs_trans_handle *trans,
 
 		ret = log_one_extent(trans, inode, em, path, ctx);
 		write_lock(&tree->lock);
-		clear_em_logging(tree, em);
+		clear_em_logging(inode, em);
 		free_extent_map(em);
 	}
 	WARN_ON(!list_empty(&extents));