From: Marcelo Tosatti <mtosatti@redhat.com>
Date: Sun, 1 Apr 2012 16:53:36 +0000 (-0300)
Subject: x86, kvm: Call restore_sched_clock_state() only after %gs is initialized
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=dba69d1092e291e257fb5673a3ad0e4c87878ebc;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

x86, kvm: Call restore_sched_clock_state() only after %gs is initialized

s2ram broke due to this KVM commit:

  b74f05d61b73 x86: kvmclock: abstract save/restore sched_clock_state

restore_sched_clock_state() methods use percpu data, therefore
they must run after %gs is initialized, but before mtrr_bp_restore()
(due to lockstat using sched_clock).

Move it to the correct place.

Reported-and-tested-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Avi Kivity <avi@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---

diff --git a/arch/x86/power/cpu.c b/arch/x86/power/cpu.c
index 47936830968c..218cdb16163c 100644
--- a/arch/x86/power/cpu.c
+++ b/arch/x86/power/cpu.c
@@ -225,13 +225,13 @@ static void __restore_processor_state(struct saved_context *ctxt)
 	fix_processor_context();
 
 	do_fpu_end();
+	x86_platform.restore_sched_clock_state();
 	mtrr_bp_restore();
 }
 
 /* Needed by apm.c */
 void restore_processor_state(void)
 {
-	x86_platform.restore_sched_clock_state();
 	__restore_processor_state(&saved_context);
 }
 #ifdef CONFIG_X86_32