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| author | Ran Tian <tianran_trtr@163.com> | 2022-11-23 22:45:14 +0800 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2022-11-23 07:16:38 -1000 |
| commit | 674b745e22b3caae48ad20422795eefd3f832a7b (patch) | |
| tree | 9b751586d3ee68c0bb33f9adc9043a9c1cde2d13 /kernel/cgroup | |
| parent | 0a2cafe6c7c25597a026ab961c3182c8179c7959 (diff) | |
cgroup: remove rcu_read_lock()/rcu_read_unlock() in critical section of spin_lock_irq()
spin_lock_irq() already disable preempt, so remove rcu_read_lock().
Signed-off-by: Ran Tian <tianran_trtr@163.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'kernel/cgroup')
| -rw-r--r-- | kernel/cgroup/cgroup.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index f2743a476190..3028f6bc7d11 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -2866,14 +2866,12 @@ int cgroup_migrate(struct task_struct *leader, bool threadgroup, * take an rcu_read_lock. */ spin_lock_irq(&css_set_lock); - rcu_read_lock(); task = leader; do { cgroup_migrate_add_task(task, mgctx); if (!threadgroup) break; } while_each_thread(leader, task); - rcu_read_unlock(); spin_unlock_irq(&css_set_lock); return cgroup_migrate_execute(mgctx); |