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-rw-r--r--fs/btrfs/extent_map.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c
index 6b7eee92d981..f1616aa8d0f5 100644
--- a/fs/btrfs/extent_map.c
+++ b/fs/btrfs/extent_map.c
@@ -334,6 +334,8 @@ out:
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);