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KVM: take kvm_lock for hardware_disable() during cpu hotplug 

In kvm_cpu_hotplug(), only CPU_STARTING case is protected by kvm_lock.
This patch adds missing protection for CPU_DYING case.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Takuya Yoshikawa 2010-11-16 17:35:02 +09:00 committed by Avi Kivity
parent e730b63cc0
commit 97e91e28fa
1 changed files with 2 additions and 0 deletions
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2
virt/kvm/kvm_main.c
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@ -2140,7 +2140,9 @@ static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val,
case CPU_DYING:
printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
cpu);
spin_lock(&kvm_lock);
hardware_disable(NULL);
spin_unlock(&kvm_lock);
break;
case CPU_STARTING:
printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n",