To modify cpuset, both cpuset_mutex and callback_lock are needed. Add helpers for cpuset-v1 to get callback_lock. Signed-off-by: Chen Ridong <chenridong@xxxxxxxxxx> --- kernel/cgroup/cpuset-internal.h | 2 ++ kernel/cgroup/cpuset.c | 10 ++++++++++ 2 files changed, 12 insertions(+) diff --git a/kernel/cgroup/cpuset-internal.h b/kernel/cgroup/cpuset-internal.h index 02c4b0c74fa9..9a60dd6681e4 100644 --- a/kernel/cgroup/cpuset-internal.h +++ b/kernel/cgroup/cpuset-internal.h @@ -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 diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c index 0a3347e4dddc..2b2dc963299b 100644 --- a/kernel/cgroup/cpuset.c +++ b/kernel/cgroup/cpuset.c @@ -269,6 +269,16 @@ 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); -- 2.34.1