diff options
| author | Chen Ridong <chenridong@huawei.com> | 2025-12-18 09:31:36 +0000 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2025-12-18 08:35:57 -1000 |
| commit | 14c11e1b2ac47fbc51503c7d0f35fad9ea5ea46e (patch) | |
| tree | 1259a7bb20a1f63344c63c6452a6dedb144f06cb | |
| parent | 6ee43047e8ada63c4dfee01e2ea7e7eadfcda2ab (diff) | |
cpuset: add lockdep_assert_cpuset_lock_held helper
Add lockdep_assert_cpuset_lock_held() to allow other subsystems to verify
that cpuset_mutex is held.
Suggested-by: Waiman Long <longman@redhat.com>
Signed-off-by: Chen Ridong <chenridong@huawei.com>
Reviewed-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
| -rw-r--r-- | include/linux/cpuset.h | 2 | ||||
| -rw-r--r-- | kernel/cgroup/cpuset.c | 5 |
2 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/cpuset.h b/include/linux/cpuset.h index a98d3330385c..a634489c9f12 100644 --- a/include/linux/cpuset.h +++ b/include/linux/cpuset.h @@ -74,6 +74,7 @@ extern void inc_dl_tasks_cs(struct task_struct *task); extern void dec_dl_tasks_cs(struct task_struct *task); extern void cpuset_lock(void); extern void cpuset_unlock(void); +extern void lockdep_assert_cpuset_lock_held(void); extern void cpuset_cpus_allowed_locked(struct task_struct *p, struct cpumask *mask); extern void cpuset_cpus_allowed(struct task_struct *p, struct cpumask *mask); extern bool cpuset_cpus_allowed_fallback(struct task_struct *p); @@ -195,6 +196,7 @@ static inline void inc_dl_tasks_cs(struct task_struct *task) { } static inline void dec_dl_tasks_cs(struct task_struct *task) { } static inline void cpuset_lock(void) { } static inline void cpuset_unlock(void) { } +static inline void lockdep_assert_cpuset_lock_held(void) { } static inline void cpuset_cpus_allowed_locked(struct task_struct *p, struct cpumask *mask) diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c index fea577b4016a..4fa3080da3be 100644 --- a/kernel/cgroup/cpuset.c +++ b/kernel/cgroup/cpuset.c @@ -271,6 +271,11 @@ void cpuset_unlock(void) mutex_unlock(&cpuset_mutex); } +void lockdep_assert_cpuset_lock_held(void) +{ + lockdep_assert_held(&cpuset_mutex); +} + /** * cpuset_full_lock - Acquire full protection for cpuset modification * |