diff options
Diffstat (limited to 'fs/btrfs/locking.c')
-rw-r--r-- | fs/btrfs/locking.c | 22 |
1 files changed, 0 insertions, 22 deletions
diff --git a/fs/btrfs/locking.c b/fs/btrfs/locking.c index 68fd9ccf1805..9ebe9385129b 100644 --- a/fs/btrfs/locking.c +++ b/fs/btrfs/locking.c | |||
@@ -236,25 +236,3 @@ int btrfs_tree_locked(struct extent_buffer *eb) | |||
236 | return test_bit(EXTENT_BUFFER_BLOCKING, &eb->bflags) || | 236 | return test_bit(EXTENT_BUFFER_BLOCKING, &eb->bflags) || |
237 | spin_is_locked(&eb->lock); | 237 | spin_is_locked(&eb->lock); |
238 | } | 238 | } |
239 | |||
240 | /* | ||
241 | * btrfs_search_slot uses this to decide if it should drop its locks | ||
242 | * before doing something expensive like allocating free blocks for cow. | ||
243 | */ | ||
244 | int btrfs_path_lock_waiting(struct btrfs_path *path, int level) | ||
245 | { | ||
246 | int i; | ||
247 | struct extent_buffer *eb; | ||
248 | |||
249 | for (i = level; i <= level + 1 && i < BTRFS_MAX_LEVEL; i++) { | ||
250 | eb = path->nodes[i]; | ||
251 | if (!eb) | ||
252 | break; | ||
253 | smp_mb(); | ||
254 | if (spin_is_contended(&eb->lock) || | ||
255 | waitqueue_active(&eb->lock_wq)) | ||
256 | return 1; | ||
257 | } | ||
258 | return 0; | ||
259 | } | ||
260 | |||