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| author | Tejun Heo <tj@kernel.org> | 2012-11-19 08:13:38 -0800 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2012-11-19 08:13:38 -0800 |
| commit | b1929db42f8a649d9a9e397119f628c27fd4021f (patch) | |
| tree | 04c0fa6f056395f8d17b5cd918403547be3f1425 /kernel/cgroup_freezer.c | |
| parent | 4b8b47eb0001a89f271d671d959b235faa8f03e2 (diff) | |
| download | lwn-b1929db42f8a649d9a9e397119f628c27fd4021f.tar.gz lwn-b1929db42f8a649d9a9e397119f628c27fd4021f.zip | |
cgroup: allow ->post_create() to fail
There could be cases where controllers want to do initialization
operations which may fail from ->post_create(). This patch makes
->post_create() return -errno to indicate failure and online_css()
relay such failures.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
Cc: Glauber Costa <glommer@parallels.com>
Diffstat (limited to 'kernel/cgroup_freezer.c')
| -rw-r--r-- | kernel/cgroup_freezer.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/cgroup_freezer.c b/kernel/cgroup_freezer.c index 670a4af7dc94..ee8bb671688c 100644 --- a/kernel/cgroup_freezer.c +++ b/kernel/cgroup_freezer.c @@ -112,7 +112,7 @@ static struct cgroup_subsys_state *freezer_create(struct cgroup *cgroup) * parent's freezing state while holding both parent's and our * freezer->lock. */ -static void freezer_post_create(struct cgroup *cgroup) +static int freezer_post_create(struct cgroup *cgroup) { struct freezer *freezer = cgroup_freezer(cgroup); struct freezer *parent = parent_freezer(freezer); @@ -136,6 +136,8 @@ static void freezer_post_create(struct cgroup *cgroup) spin_unlock(&freezer->lock); if (parent) spin_unlock_irq(&parent->lock); + + return 0; } /** |