From: Eric Auger <eric.auger@linaro.org>
Date: Mon, 7 Mar 2016 16:50:36 +0000 (+0700)
Subject: KVM: arm/arm64: disable preemption when calling smp_call_function_many
X-Git-Tag: v4.6-rc1~46^2~24^2~2
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=898f949fb7bc1210b79f06a04d1956d106a32633;p=linux-block.git

KVM: arm/arm64: disable preemption when calling smp_call_function_many

Preemption must be disabled when calling smp_call_function_many

Reported-by: bartosz.wawrzyniak@tieto.com
Signed-off-by: Eric Auger <eric.auger@linaro.org>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
---

diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index 3e0fb66d8e05..6accd66d26f0 100644
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -373,7 +373,9 @@ static void exit_vm_noop(void *info)
 
 void force_vm_exit(const cpumask_t *mask)
 {
+	preempt_disable();
 	smp_call_function_many(mask, exit_vm_noop, NULL, true);
+	preempt_enable();
 }
 
 /**