diff mbox series

[18/36] cpuidle: Annotate poll_idle()

Message ID 20220608144517.061583457@infradead.org (mailing list archive)
State Handled Elsewhere
Headers show
Series cpuidle,rcu: Cleanup the mess | expand

Commit Message

Peter Zijlstra June 8, 2022, 2:27 p.m. UTC
The __cpuidle functions will become a noinstr class, as such they need
explicit annotations.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
 drivers/cpuidle/poll_state.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

Comments

Rafael J. Wysocki July 6, 2022, 2 p.m. UTC | #1
On Wed, Jun 8, 2022 at 4:46 PM Peter Zijlstra <peterz@infradead.org> wrote:
>
> The __cpuidle functions will become a noinstr class, as such they need
> explicit annotations.
>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>

Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

> ---
>  drivers/cpuidle/poll_state.c |    6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
>
> --- a/drivers/cpuidle/poll_state.c
> +++ b/drivers/cpuidle/poll_state.c
> @@ -13,7 +13,10 @@
>  static int __cpuidle poll_idle(struct cpuidle_device *dev,
>                                struct cpuidle_driver *drv, int index)
>  {
> -       u64 time_start = local_clock();
> +       u64 time_start;
> +
> +       instrumentation_begin();
> +       time_start = local_clock();
>
>         dev->poll_time_limit = false;
>
> @@ -39,6 +42,7 @@ static int __cpuidle poll_idle(struct cp
>         raw_local_irq_disable();
>
>         current_clr_polling();
> +       instrumentation_end();
>
>         return index;
>  }
>
>
diff mbox series

Patch

--- a/drivers/cpuidle/poll_state.c
+++ b/drivers/cpuidle/poll_state.c
@@ -13,7 +13,10 @@ 
 static int __cpuidle poll_idle(struct cpuidle_device *dev,
 			       struct cpuidle_driver *drv, int index)
 {
-	u64 time_start = local_clock();
+	u64 time_start;
+
+	instrumentation_begin();
+	time_start = local_clock();
 
 	dev->poll_time_limit = false;
 
@@ -39,6 +42,7 @@  static int __cpuidle poll_idle(struct cp
 	raw_local_irq_disable();
 
 	current_clr_polling();
+	instrumentation_end();
 
 	return index;
 }