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-rw-r--r--kernel/cgroup_freezer.c16
1 files changed, 7 insertions, 9 deletions
diff --git a/kernel/cgroup_freezer.c b/kernel/cgroup_freezer.c
index 7f54d1c4295..e9c856a265c 100644
--- a/kernel/cgroup_freezer.c
+++ b/kernel/cgroup_freezer.c
@@ -162,9 +162,13 @@ static int freezer_can_attach(struct cgroup_subsys *ss,
struct task_struct *task)
{
struct freezer *freezer;
- int retval;
- /* Anything frozen can't move or be moved to/from */
+ /*
+ * Anything frozen can't move or be moved to/from.
+ *
+ * Since orig_freezer->state == FROZEN means that @task has been
+ * frozen, so it's sufficient to check the latter condition.
+ */
if (is_task_frozen_enough(task))
return -EBUSY;
@@ -173,13 +177,7 @@ static int freezer_can_attach(struct cgroup_subsys *ss,
if (freezer->state == CGROUP_FROZEN)
return -EBUSY;
- retval = 0;
- task_lock(task);
- freezer = task_freezer(task);
- if (freezer->state == CGROUP_FROZEN)
- retval = -EBUSY;
- task_unlock(task);
- return retval;
+ return 0;
}
static void freezer_fork(struct cgroup_subsys *ss, struct task_struct *task)