The tree is going to be modified so it must be the exclusive lock. Signed-off-by: David Sterba <dsterba@xxxxxxxx> --- fs/btrfs/ctree.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c index 5df76c17775a..99a585ede79d 100644 --- a/fs/btrfs/ctree.c +++ b/fs/btrfs/ctree.c @@ -376,8 +376,6 @@ void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, * The 'start address' is the logical address of the *new* root node * for root replace operations, or the logical address of the affected * block for all other operations. - * - * Note: must be called with write lock for fs_info::tree_mod_log_lock. */ static noinline int __tree_mod_log_insert(struct btrfs_fs_info *fs_info, struct tree_mod_elem *tm) @@ -387,6 +385,8 @@ __tree_mod_log_insert(struct btrfs_fs_info *fs_info, struct tree_mod_elem *tm) struct rb_node *parent = NULL; struct tree_mod_elem *cur; + lockdep_assert_held_exclusive(&fs_info->tree_mod_log_lock); + tm->seq = btrfs_inc_tree_mod_seq(fs_info); tm_root = &fs_info->tree_mod_log; -- 2.21.0
