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| author | Peter Zijlstra <peterz@infradead.org> | 2023-01-12 20:43:17 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2023-01-13 11:03:21 +0100 |
| commit | 5e26aa93391195a64871db5d96d7163f0062ca4f (patch) | |
| tree | 6d792c86d44ca8bdbafa06a806d36bab037079fd /drivers/cpuidle | |
| parent | aaa3896b969bdf946e0fd6aa6199da17b5da8d5c (diff) | |
| download | lwn-5e26aa93391195a64871db5d96d7163f0062ca4f.tar.gz lwn-5e26aa93391195a64871db5d96d7163f0062ca4f.zip | |
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
Diffstat (limited to 'drivers/cpuidle')
| -rw-r--r-- | drivers/cpuidle/poll_state.c | 4 |
1 files changed, 3 insertions, 1 deletions
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; |