diff options
| author | Frederic Weisbecker <frederic@kernel.org> | 2025-05-27 15:35:14 +0200 |
|---|---|---|
| committer | Frederic Weisbecker <frederic@kernel.org> | 2026-02-03 15:23:33 +0100 |
| commit | a7e546354d9c534dc045ce0cf9ff05d81351a751 (patch) | |
| tree | a3e931e28f73924f309b55f2a6deebff1b56297c /kernel/cgroup | |
| parent | 622c508bcf4852ad56ae37bf6f08e9a4e6aa95b2 (diff) | |
cpuset: Provide lockdep check for cpuset lock held
cpuset modifies partitions, including isolated, while holding the cpuset
mutex.
This means that holding the cpuset mutex is safe to synchronize against
housekeeping cpumask changes.
Provide a lockdep check to validate that.
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: "Michal Koutný" <mkoutny@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Marco Crivellari <marco.crivellari@suse.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Waiman Long <longman@redhat.com>
Cc: cgroups@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Diffstat (limited to 'kernel/cgroup')
| -rw-r--r-- | kernel/cgroup/cpuset.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c index 3afa72f8d579..5e2e3514c22e 100644 --- a/kernel/cgroup/cpuset.c +++ b/kernel/cgroup/cpuset.c @@ -283,6 +283,13 @@ void cpuset_full_unlock(void) cpus_read_unlock(); } +#ifdef CONFIG_LOCKDEP +bool lockdep_is_cpuset_held(void) +{ + return lockdep_is_held(&cpuset_mutex); +} +#endif + static DEFINE_SPINLOCK(callback_lock); void cpuset_callback_lock_irq(void) |