From: Peter Zijlstra peterz@infradead.org
commit 5e26aa93391195a64871db5d96d7163f0062ca4f upstream.
Make cpuidle_state::enter() methods IRQ state invariant on exit.
Additionally make sure to use raw_local_irq_*() methods since this cpuidle callback will be called with RCU already disabled.
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: Rafael J. Wysocki rafael.j.wysocki@intel.com Reviewed-by: Frederic Weisbecker frederic@kernel.org Link: https://lore.kernel.org/r/20230112195539.515253662@infradead.org Signed-off-by: Suren Baghdasaryan surenb@google.com Signed-off-by: Cheng-Jui Wang cheng-jui.wang@mediatek.com --- drivers/cpuidle/poll_state.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/cpuidle/poll_state.c b/drivers/cpuidle/poll_state.c index f7e83613ae94..1f578ed09c73 100644 --- a/drivers/cpuidle/poll_state.c +++ b/drivers/cpuidle/poll_state.c @@ -17,7 +17,7 @@ static int __cpuidle poll_idle(struct cpuidle_device *dev,
dev->poll_time_limit = false;
- local_irq_enable(); + raw_local_irq_enable(); if (!current_set_polling_and_test()) { unsigned int loop_count = 0; u64 limit; @@ -36,6 +36,8 @@ static int __cpuidle poll_idle(struct cpuidle_device *dev, } } } + raw_local_irq_disable(); + current_clr_polling();
return index;