[PATCH 2/3] cpuidle: powernv: Don't continually set thread priority in snooze_loop()

[Vaidyanathan Srinivasan]

* Anton Blanchard <anton at ozlabs.org> [2017-04-04 07:54:13]:

> From: Anton Blanchard <anton at samba.org>
> 
> The powerpc64 kernel exception handlers have preserved thread priorities
> for a long time now, so there is no need to continually set it.
> 
> Just set it once on entry and once exit.
> 
> Signed-off-by: Anton Blanchard <anton at samba.org>

Reviewed-by: Vaidyanathan Srinivasan <svaidy at linux.vnet.ibm.com>

> ---
>  drivers/cpuidle/cpuidle-powernv.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/cpuidle/cpuidle-powernv.c b/drivers/cpuidle/cpuidle-powernv.c
> index 9d9f164894eb..8c991c254b95 100644
> --- a/drivers/cpuidle/cpuidle-powernv.c
> +++ b/drivers/cpuidle/cpuidle-powernv.c
> @@ -56,8 +56,8 @@ static int snooze_loop(struct cpuidle_device *dev,
> 
>  	snooze_exit_time = get_tb() + snooze_timeout;
>  	ppc64_runlatch_off();
> +	HMT_very_low();
>  	while (!need_resched()) {
> -		HMT_very_low();
>  		if (snooze_timeout_en && get_tb() > snooze_exit_time)
>  			break;
>  	}
> -- 
> 2.11.0
>