Patch "x86: PM: Make APM idle driver initialize polling state" has been added to the 4.15-stable tree

From f859422075165e32c00c8d75d63f300015cc07ae Mon Sep 17 00:00:00 2001

This is a note to let you know that I've just added the patch titled

x86: PM: Make APM idle driver initialize polling state

to the 4.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
x86-pm-make-apm-idle-driver-initialize-polling-state.patch
and it can be found in the queue-4.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From f859422075165e32c00c8d75d63f300015cc07ae Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <[email protected]>
Date: Tue, 6 Feb 2018 18:55:12 +0100
Subject: x86: PM: Make APM idle driver initialize polling state
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From: Rafael J. Wysocki <[email protected]>

commit f859422075165e32c00c8d75d63f300015cc07ae upstream.

Update the APM driver overlooked by commit 1b39e3f813b4 (cpuidle: Make drivers initialize polling state) to initialize the polling state like the other cpuidle drivers modified by that commit to prevent cpuidle from crashing.

Fixes 1b39e3f813b4 (cpuidle: Make drivers initialize polling state)

Reported-by Ville Syrjälä <[email protected]>

Tested-by Ville Syrjälä <[email protected]>

Cc 4.14+ <[email protected]> # 4.14+

Signed-off-by Rafael J. Wysocki <[email protected]>

Signed-off-by Greg Kroah-Hartman <[email protected]>

---
  arch/x86/kernel/apm_32.c |    1 +
  1 file changed, 1 insertion(+)

arch/x86/kernel/apm_32.c +1 -0

@@ -2389,6 +2389,7 @@ static int __init apm_init(void)
  	if (HZ != 100)
  		idle_period = (idle_period * HZ) / 100;
  	if (idle_threshold < 100) {
+		cpuidle_poll_state_init(&apm_idle_driver);
  		if (!cpuidle_register_driver(&apm_idle_driver))
  			if (cpuidle_register_device(&apm_cpuidle_device))
  				cpuidle_unregister_driver(&apm_idle_driver);

Patches currently in stable-queue which might be from [email protected] are

queue-4.15/x86-pm-make-apm-idle-driver-initialize-polling-state.patch queue-4.15/cpufreq-powernv-dont-assume-distinct-pstate-values-for-nominal-and-pmin.patch

Quoted 6 lines · On 2/19/2018 5:43 PM, [email protected] wrote:

This is a note to let you know that I've just added the patch titled

x86: PM: Make APM idle driver initialize polling state

to the 4.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

Mainline commit

commit��� d7212cfb05ba802bea4dd6c90d61cfe6366ea224 tree��� 92b37c0446514a1304d5222337f93189c1c67650 parent��� b6d8ef86cb7b8b6920b6815ebf1352757d3adb87

PM: cpuidle: Fix cpuidle_poll_state_init() prototype

is necessary on top of this to fix a build issue on 32-bit x86 when CONFIG_CPU_IDLE is not set.