[3/5] btrfs: assert tree mod log lock in __tree_mod_log_insert
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Message ID b5d0e50544f219a444aafc3284fa899f875fab84.1559321947.git.dsterba@suse.com
State New
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Series
  • More lockdep annotations
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Commit Message

David Sterba May 31, 2019, 5:01 p.m. UTC
The tree is going to be modified so it must be the exclusive lock.

Signed-off-by: David Sterba <dsterba@suse.com>
---
 fs/btrfs/ctree.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Patch
diff mbox series

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;