diff options
Diffstat (limited to 'kernel/cgroup/cgroup.c')
| -rw-r--r-- | kernel/cgroup/cgroup.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index 9d809191a54f..f329f49529a2 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -2872,9 +2872,9 @@ int cgroup_migrate(struct task_struct *leader, bool threadgroup, struct task_struct *task; /* - * Prevent freeing of tasks while we take a snapshot. Tasks that are - * already PF_EXITING could be freed from underneath us unless we - * take an rcu_read_lock. + * The following thread iteration should be inside an RCU critical + * section to prevent tasks from being freed while taking the snapshot. + * spin_lock_irq() implies RCU critical section here. */ spin_lock_irq(&css_set_lock); task = leader; |