diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2023-01-12 20:43:28 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2023-01-13 11:48:15 +0100 |
| commit | 924aed1646bf2859726f7e5dd9265ba14358fbb8 (patch) | |
| tree | 32f5fb3ef63095554c8ad93d88733bcbebcb3d41 /kernel/cpu_pm.c | |
| parent | a01353cf1896ea5b8a7bbc5e2b2d38feed8b7aaa (diff) | |
| download | lwn-924aed1646bf2859726f7e5dd9265ba14358fbb8.tar.gz lwn-924aed1646bf2859726f7e5dd9265ba14358fbb8.zip | |
cpuidle, cpu_pm: Remove RCU fiddling from cpu_pm_{enter,exit}()
All callers should still have RCU enabled.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Tony Lindgren <tony@atomide.com>
Tested-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Frederic Weisbecker <frederic@kernel.org>
Link: https://lore.kernel.org/r/20230112195540.190860672@infradead.org
Diffstat (limited to 'kernel/cpu_pm.c')
| -rw-r--r-- | kernel/cpu_pm.c | 9 |
1 files changed, 0 insertions, 9 deletions
diff --git a/kernel/cpu_pm.c b/kernel/cpu_pm.c index ba4ba71facf9..b0f0d15085db 100644 --- a/kernel/cpu_pm.c +++ b/kernel/cpu_pm.c @@ -30,16 +30,9 @@ static int cpu_pm_notify(enum cpu_pm_event event) { int ret; - /* - * This introduces a RCU read critical section, which could be - * disfunctional in cpu idle. Copy RCU_NONIDLE code to let RCU know - * this. - */ - ct_irq_enter_irqson(); rcu_read_lock(); ret = raw_notifier_call_chain(&cpu_pm_notifier.chain, event, NULL); rcu_read_unlock(); - ct_irq_exit_irqson(); return notifier_to_errno(ret); } @@ -49,11 +42,9 @@ static int cpu_pm_notify_robust(enum cpu_pm_event event_up, enum cpu_pm_event ev unsigned long flags; int ret; - ct_irq_enter_irqson(); raw_spin_lock_irqsave(&cpu_pm_notifier.lock, flags); ret = raw_notifier_call_chain_robust(&cpu_pm_notifier.chain, event_up, event_down, NULL); raw_spin_unlock_irqrestore(&cpu_pm_notifier.lock, flags); - ct_irq_exit_irqson(); return notifier_to_errno(ret); } |