From 4d627628d7584f3d3add1d53342d0f01aa878e04 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Thu, 26 Jan 2023 16:08:38 +0100 Subject: cpuidle: Fix poll_idle() noinstr annotation The instrumentation_begin()/end() annotations in poll_idle() were complete nonsense. Specifically they caused tracing to happen in the middle of noinstr code, resulting in RCU splats. Now that local_clock() is noinstr, mark up the rest and let it rip. Fixes: 00717eb8c955 ("cpuidle: Annotate poll_idle()") Reported-by: kernel test robot Signed-off-by: Peter Zijlstra (Intel) Signed-off-by: Ingo Molnar Acked-by: Rafael J. Wysocki Link: https://lore.kernel.org/oe-lkp/202301192148.58ece903-oliver.sang@intel.com Link: https://lore.kernel.org/r/20230126151323.819534689@infradead.org --- drivers/cpuidle/cpuidle.c | 2 +- drivers/cpuidle/poll_state.c | 2 -- 2 files changed, 1 insertion(+), 3 deletions(-) (limited to 'drivers/cpuidle') diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c index 500d1720421e..0b00f21cefe3 100644 --- a/drivers/cpuidle/cpuidle.c +++ b/drivers/cpuidle/cpuidle.c @@ -426,7 +426,7 @@ void cpuidle_reflect(struct cpuidle_device *dev, int index) * @dev: the cpuidle device * */ -u64 cpuidle_poll_time(struct cpuidle_driver *drv, +__cpuidle u64 cpuidle_poll_time(struct cpuidle_driver *drv, struct cpuidle_device *dev) { int i; diff --git a/drivers/cpuidle/poll_state.c b/drivers/cpuidle/poll_state.c index d25ec52846e6..bdcfeaecd228 100644 --- a/drivers/cpuidle/poll_state.c +++ b/drivers/cpuidle/poll_state.c @@ -15,7 +15,6 @@ static int __cpuidle poll_idle(struct cpuidle_device *dev, { u64 time_start; - instrumentation_begin(); time_start = local_clock(); dev->poll_time_limit = false; @@ -42,7 +41,6 @@ static int __cpuidle poll_idle(struct cpuidle_device *dev, raw_local_irq_disable(); current_clr_polling(); - instrumentation_end(); return index; } -- cgit v1.2.3