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| author | Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> | 2010-11-16 17:35:02 +0900 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-01-12 11:29:28 +0200 |
| commit | 97e91e28fa8fcbac30beab3de72060ada27d5671 (patch) | |
| tree | b6a1331007935961eb25157e7cceba13d9587090 /virt/kvm | |
| parent | e730b63cc083852551b092e1c93f0ef22c25f220 (diff) | |
| download | linux-stable-97e91e28fa8fcbac30beab3de72060ada27d5671.tar.gz linux-stable-97e91e28fa8fcbac30beab3de72060ada27d5671.tar.bz2 linux-stable-97e91e28fa8fcbac30beab3de72060ada27d5671.zip | |
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>
Diffstat (limited to 'virt/kvm')
| -rw-r--r-- | virt/kvm/kvm_main.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 4023264c4cd5..f69fca7a88b5 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -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", |