diff options
| author | Tejun Heo <tj@kernel.org> | 2012-04-01 12:30:01 -0700 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2012-04-01 12:55:00 -0700 |
| commit | 959d851caa48829eb85cb85aa949fd6b4c5d5bc6 (patch) | |
| tree | 3ba9c94ec346275fb44c4f0d1cd2537cdff8d811 /fs/btrfs/locking.c | |
| parent | a5567932fc926739e29e98487128080f40c61710 (diff) | |
| parent | 48ddbe194623ae089cc0576e60363f2d2e85662a (diff) | |
Merge branch 'for-3.5' of ../cgroup into block/for-3.5/core-merged
cgroup/for-3.5 contains the following changes which blk-cgroup needs
to proceed with the on-going cleanup.
* Dynamic addition and removal of cftypes to make config/stat file
handling modular for policies.
* cgroup removal update to not wait for css references to drain to fix
blkcg removal hang caused by cfq caching cfqgs.
Pull in cgroup/for-3.5 into block/for-3.5/core. This causes the
following conflicts in block/blk-cgroup.c.
* 761b3ef50e "cgroup: remove cgroup_subsys argument from callbacks"
conflicts with blkiocg_pre_destroy() addition and blkiocg_attach()
removal. Resolved by removing @subsys from all subsys methods.
* 676f7c8f84 "cgroup: relocate cftype and cgroup_subsys definitions in
controllers" conflicts with ->pre_destroy() and ->attach() updates
and removal of modular config. Resolved by dropping forward
declarations of the methods and applying updates to the relocated
blkio_subsys.
* 4baf6e3325 "cgroup: convert all non-memcg controllers to the new
cftype interface" builds upon the previous item. Resolved by adding
->base_cftypes to the relocated blkio_subsys.
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'fs/btrfs/locking.c')
| -rw-r--r-- | fs/btrfs/locking.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/fs/btrfs/locking.c b/fs/btrfs/locking.c index 5e178d8f716..272f911203f 100644 --- a/fs/btrfs/locking.c +++ b/fs/btrfs/locking.c @@ -208,7 +208,7 @@ void btrfs_tree_read_unlock_blocking(struct extent_buffer *eb) * take a spinning write lock. This will wait for both * blocking readers or writers */ -int btrfs_tree_lock(struct extent_buffer *eb) +void btrfs_tree_lock(struct extent_buffer *eb) { again: wait_event(eb->read_lock_wq, atomic_read(&eb->blocking_readers) == 0); @@ -230,13 +230,12 @@ again: atomic_inc(&eb->spinning_writers); atomic_inc(&eb->write_locks); eb->lock_owner = current->pid; - return 0; } /* * drop a spinning or a blocking write lock. */ -int btrfs_tree_unlock(struct extent_buffer *eb) +void btrfs_tree_unlock(struct extent_buffer *eb) { int blockers = atomic_read(&eb->blocking_writers); @@ -255,7 +254,6 @@ int btrfs_tree_unlock(struct extent_buffer *eb) atomic_dec(&eb->spinning_writers); write_unlock(&eb->lock); } - return 0; } void btrfs_assert_tree_locked(struct extent_buffer *eb) |