Commit 530020f2 authored by Chen Ridong's avatar Chen Ridong Committed by Tejun Heo
Browse files

cgroup/cpuset: add callback_lock helper 



To modify cpuset, both cpuset_mutex and callback_lock are needed. Add
helpers for cpuset-v1 to get callback_lock.

Signed-off-by: default avatarChen Ridong <chenridong@huawei.com>
Acked-by: default avatarWaiman Long <longman@redhat.com>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 90eec954

kernel/cgroup/cpuset-internal.h

+2 −0
Original line number Diff line number Diff line
@@ -239,6 +239,8 @@ static inline int is_spread_slab(const struct cpuset *cs) 
}



void rebuild_sched_domains_locked(void);

void callback_lock_irq(void);

void callback_unlock_irq(void);



/*

 * cpuset-v1.c

kernel/cgroup/cpuset.c

+10 −0
Original line number Diff line number Diff line
@@ -275,6 +275,16 @@ void cpuset_unlock(void) 


static DEFINE_SPINLOCK(callback_lock);



void callback_lock_irq(void)

{

	spin_lock_irq(&callback_lock);

}



void callback_unlock_irq(void)

{

	spin_unlock_irq(&callback_lock);

}



static struct workqueue_struct *cpuset_migrate_mm_wq;



static DECLARE_WAIT_QUEUE_HEAD(cpuset_attach_wq);