From: Jan Kiszka <jan.kiszka@siemens.com>
Date: Mon, 1 Nov 2010 13:01:13 +0000 (+0100)
Subject: KVM: x86: Issue smp_call_function_many with preemption disabled
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=453d9c57e27b4401bc3e98906bcac31ae8be0165;p=sagit-ice-cold%2Fkernel_xiaomi_msm8998.git

KVM: x86: Issue smp_call_function_many with preemption disabled

smp_call_function_many is specified to be called only with preemption
disabled. Fulfill this requirement.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 463c65b8f93f..cdac9e592aa5 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3978,8 +3978,10 @@ int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu)
 		return X86EMUL_CONTINUE;
 
 	if (kvm_x86_ops->has_wbinvd_exit()) {
+		preempt_disable();
 		smp_call_function_many(vcpu->arch.wbinvd_dirty_mask,
 				wbinvd_ipi, NULL, 1);
+		preempt_enable();
 		cpumask_clear(vcpu->arch.wbinvd_dirty_mask);
 	}
 	wbinvd();