[PATCH 03/36] cpuidle/poll: Ensure IRQ state is invariant

Peter Zijlstra
2022-06-08T14:47:37Z

cpuidle_state::enter() methods should be IRQ invariant

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
drivers/cpuidle/poll_state.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/cpuidle/poll_state.c
+++ b/drivers/cpuidle/poll_state.c
@@ -17,7 +17,7 @@ static int __cpuidle poll_idle(struct cp

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 cp
}
}
}
+ raw_local_irq_disable();
+
current_clr_polling();

return index;