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Power management fixes for 3.6-rc2

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* Fix for two recent regressions in the generic PM domains framework.
 * Revert of a commit that introduced a resume regression and is conceptually
   incorrect in my opinion.
 * Fix for a return value in pcc-cpufreq.c from Julia Lawall.
 * RTC wakeup signaling fix from Neil Brown.
 * Suppression of compiler warnings for CONFIG_PM_SLEEP unset in ACPI,
   platform/x86 and TPM drivers.
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Merge tag 'pm-for-3.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael J. Wysocki:

 - Fix for two recent regressions in the generic PM domains framework.

 - Revert of a commit that introduced a resume regression and is
   conceptually incorrect in my opinion.

 - Fix for a return value in pcc-cpufreq.c from Julia Lawall.

 - RTC wakeup signaling fix from Neil Brown.

 - Suppression of compiler warnings for CONFIG_PM_SLEEP unset in ACPI,
   platform/x86 and TPM drivers.

* tag 'pm-for-3.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  tpm_tis / PM: Fix unused function warning for CONFIG_PM_SLEEP
  platform / x86 / PM: Fix unused function warnings for CONFIG_PM_SLEEP
  ACPI / PM: Fix unused function warnings for CONFIG_PM_SLEEP
  Revert "NMI watchdog: fix for lockup detector breakage on resume"
  PM: Make dev_pm_get_subsys_data() always return 0 on success
  drivers/cpufreq/pcc-cpufreq.c: fix error return code
  RTC: Avoid races between RTC alarm wakeup and suspend.
This commit is contained in:
Linus Torvalds 2012-08-12 21:34:09 +03:00
commit e4e139bebd
27 changed files with 71 additions and 38 deletions
Download patch file Download diff file Expand all files Collapse all files

3
kernel/power/suspend.c
View file

@ -178,9 +178,6 @@ static int suspend_enter(suspend_state_t state, bool *wakeup)
arch_suspend_enable_irqs();
BUG_ON(irqs_disabled());
/* Kick the lockup detector */
lockup_detector_bootcpu_resume();
Enable_cpus:
enable_nonboot_cpus();

21
kernel/watchdog.c
View file

@ -575,7 +575,7 @@ out:
/*
* Create/destroy watchdog threads as CPUs come and go:
*/
static int
static int __cpuinit
cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
{
int hotcpu = (unsigned long)hcpu;
@ -610,27 +610,10 @@ cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
return NOTIFY_OK;
}
static struct notifier_block cpu_nfb = {
static struct notifier_block __cpuinitdata cpu_nfb = {
.notifier_call = cpu_callback
};
#ifdef CONFIG_SUSPEND
/*
* On exit from suspend we force an offline->online transition on the boot CPU
* so that the PMU state that was lost while in suspended state gets set up
* properly for the boot CPU. This information is required for restarting the
* NMI watchdog.
*/
void lockup_detector_bootcpu_resume(void)
{
void *cpu = (void *)(long)smp_processor_id();
cpu_callback(&cpu_nfb, CPU_DEAD_FROZEN, cpu);
cpu_callback(&cpu_nfb, CPU_UP_PREPARE_FROZEN, cpu);
cpu_callback(&cpu_nfb, CPU_ONLINE_FROZEN, cpu);
}
#endif
void __init lockup_detector_init(void)
{
void *cpu = (void *)(long)smp_processor_id();