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| author |  Peter Zijlstra <peterz@infradead.org>
| 2023-01-26 16:08:38 +0100 |
|---|---|---|
| committer |  Ingo Molnar <mingo@kernel.org>
| 2023-01-31 15:01:47 +0100 |
| commit | 4d627628d7584f3d3add1d53342d0f01aa878e04 (patch) | |
| tree | 9a5efa3170d02f87c19c061750a63b9f119cd345 /drivers/cpuidle/poll_state.c | |
| parent | sched/clock: Make local_clock() noinstr (diff) | |
| download | linux-4d627628d7584f3d3add1d53342d0f01aa878e04.tar.gz linux-4d627628d7584f3d3add1d53342d0f01aa878e04.tar.bz2 linux-4d627628d7584f3d3add1d53342d0f01aa878e04.zip | |
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 <oliver.sang@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/oe-lkp/202301192148.58ece903-oliver.sang@intel.com
Link: https://lore.kernel.org/r/20230126151323.819534689@infradead.org
Diffstat (limited to 'drivers/cpuidle/poll_state.c')
| -rw-r--r-- | drivers/cpuidle/poll_state.c | 2 |
1 files changed, 0 insertions, 2 deletions
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; } |