Commit 74333c7d authored by Filipe Manana's avatar Filipe Manana Committed by David Sterba
Browse files

btrfs: assert tree is locked when clearing extent map from logging 



When calling clear_em_logging() we should have a write lock on the extent
map tree, as we will try to merge the extent map with the previous and
next ones in the tree. So assert that we have a write lock.

Signed-off-by: default avatarFilipe Manana <fdmanana@suse.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 2e0cdaa0

fs/btrfs/extent_map.c

+2 −0
Original line number Diff line number Diff line
@@ -334,6 +334,8 @@ int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len, 


void clear_em_logging(struct extent_map_tree *tree, struct extent_map *em)

{

	lockdep_assert_held_write(&tree->lock);



	clear_bit(EXTENT_FLAG_LOGGING, &em->flags);

	if (extent_map_in_tree(em))

		try_merge_map(tree, em);