cpuidle/poll: Ensure IRQs stay disabled after cpuidle_state::enter() calls
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
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@ -17,7 +17,7 @@ static int __cpuidle poll_idle(struct cpuidle_device *dev,
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dev->poll_time_limit = false;
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local_irq_enable();
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raw_local_irq_enable();
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if (!current_set_polling_and_test()) {
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unsigned int loop_count = 0;
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u64 limit;
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@ -36,6 +36,8 @@ static int __cpuidle poll_idle(struct cpuidle_device *dev,
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}
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}
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}
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raw_local_irq_disable();
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current_clr_polling();
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return index;
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