diff options
| -rw-r--r-- | fs/btrfs/locking.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/fs/btrfs/locking.c b/fs/btrfs/locking.c index 82b84e4daad1..13ef1decdea6 100644 --- a/fs/btrfs/locking.c +++ b/fs/btrfs/locking.c @@ -14,6 +14,30 @@ static void btrfs_assert_tree_read_locked(struct extent_buffer *eb); +#ifdef CONFIG_BTRFS_DEBUG +static void btrfs_assert_spinning_writers_get(struct extent_buffer *eb) +{ + WARN_ON(atomic_read(&eb->spinning_writers)); + atomic_inc(&eb->spinning_writers); +} + +static void btrfs_assert_spinning_writers_put(struct extent_buffer *eb) +{ + WARN_ON(atomic_read(&eb->spinning_writers) != 1); + atomic_dec(&eb->spinning_writers); +} + +static void btrfs_assert_no_spinning_writers(struct extent_buffer *eb) +{ + WARN_ON(atomic_read(&eb->spinning_writers)); +} + +#else +static void btrfs_assert_spinning_writers_get(struct extent_buffer *eb) { } +static void btrfs_assert_spinning_writers_put(struct extent_buffer *eb) { } +static void btrfs_assert_no_spinning_writers(struct extent_buffer *eb) { } +#endif + void btrfs_set_lock_blocking_read(struct extent_buffer *eb) { /* |