From: Anton Blanchard <anton@samba.org>
Date: Mon, 3 Apr 2017 21:54:13 +0000 (+1000)
Subject: cpuidle: powernv: Don't continually set thread priority in snooze_loop()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=26eb48a9faf241abd60aa546e6beb896011667c1;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

cpuidle: powernv: Don't continually set thread priority in snooze_loop()

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@samba.org>
Reviewed-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

diff --git a/drivers/cpuidle/cpuidle-powernv.c b/drivers/cpuidle/cpuidle-powernv.c
index 0ddf1a5bb0a9..f8901671fff4 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;
 	}