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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-06-07 10:48:57 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-06-07 10:48:57 +0200 |
| commit | a964d23c94e8177c501fc9a37dcf1f0dd2750527 (patch) | |
| tree | 0ed074be3f49c598167e3e134a0cc4f0f49b2ea6 /arch/x86/power/cpu.c | |
| parent | a61373476127edac8bcc5ee9d68a74dc1b864f53 (diff) | |
| parent | ec527c318036a65a083ef68d8ba95789d2212246 (diff) | |
Merge branch 'pm-x86'
* pm-x86:
x86/power: Fix 'nosmt' vs hibernation triple fault during resume
x86: intel_epb: Do not build when CONFIG_PM is unset
Diffstat (limited to 'arch/x86/power/cpu.c')
| -rw-r--r-- | arch/x86/power/cpu.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/power/cpu.c b/arch/x86/power/cpu.c index a7d966964c6f..513ce09e9950 100644 --- a/arch/x86/power/cpu.c +++ b/arch/x86/power/cpu.c @@ -299,7 +299,17 @@ int hibernate_resume_nonboot_cpu_disable(void) * address in its instruction pointer may not be possible to resolve * any more at that point (the page tables used by it previously may * have been overwritten by hibernate image data). + * + * First, make sure that we wake up all the potentially disabled SMT + * threads which have been initially brought up and then put into + * mwait/cpuidle sleep. + * Those will be put to proper (not interfering with hibernation + * resume) sleep afterwards, and the resumed kernel will decide itself + * what to do with them. */ + ret = cpuhp_smt_enable(); + if (ret) + return ret; smp_ops.play_dead = resume_play_dead; ret = disable_nonboot_cpus(); smp_ops.play_dead = play_dead; |