diff options
Diffstat (limited to 'fs/btrfs/locking.h')
| -rw-r--r-- | fs/btrfs/locking.h | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/fs/btrfs/locking.h b/fs/btrfs/locking.h index 29135def468e..0453a4797693 100644 --- a/fs/btrfs/locking.h +++ b/fs/btrfs/locking.h @@ -17,7 +17,8 @@ void btrfs_tree_unlock(struct extent_buffer *eb); void btrfs_tree_read_lock(struct extent_buffer *eb); void btrfs_tree_read_unlock(struct extent_buffer *eb); void btrfs_tree_read_unlock_blocking(struct extent_buffer *eb); -void btrfs_set_lock_blocking_rw(struct extent_buffer *eb, int rw); +void btrfs_set_lock_blocking_read(struct extent_buffer *eb); +void btrfs_set_lock_blocking_write(struct extent_buffer *eb); void btrfs_clear_lock_blocking_rw(struct extent_buffer *eb, int rw); void btrfs_assert_tree_locked(struct extent_buffer *eb); int btrfs_try_tree_read_lock(struct extent_buffer *eb); @@ -37,6 +38,18 @@ static inline void btrfs_tree_unlock_rw(struct extent_buffer *eb, int rw) BUG(); } +/* + * If we currently have a spinning reader or writer lock (indicated by the rw + * flag) this will bump the count of blocking holders and drop the spinlock. + */ +static inline void btrfs_set_lock_blocking_rw(struct extent_buffer *eb, int rw) +{ + if (rw == BTRFS_WRITE_LOCK) + btrfs_set_lock_blocking_write(eb); + else if (rw == BTRFS_READ_LOCK) + btrfs_set_lock_blocking_read(eb); +} + static inline void btrfs_set_lock_blocking(struct extent_buffer *eb) { btrfs_set_lock_blocking_rw(eb, BTRFS_WRITE_LOCK); |