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authorJan Blunck <jblunck@suse.de>2009-04-07 19:58:56 -0400
committerAvi Kivity <avi@redhat.com>2009-06-10 04:48:49 -0400
commit9b62e5b10ff0f98346bcbe4a4fe3a0ca8fa7be30 (patch)
tree9170f5bce95041bc65630814d026db377beb2e25 /arch/x86/kvm
parent14d0bc1f7c8226d5088e7182c3b53e0c7e91d1af (diff)
KVM: Wake up waitqueue before calling get_cpu()
This moves the get_cpu() call down to be called after we wake up the waiters. Therefore the waitqueue locks can safely be rt mutex. Signed-off-by: Jan Blunck <jblunck@suse.de> Signed-off-by: Sven-Thorsten Dietrich <sven@thebigcorporation.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm')
-rw-r--r--arch/x86/kvm/x86.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 0f3e04b74a66..e2713716e732 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4569,7 +4569,7 @@ static void vcpu_kick_intr(void *info)
4569void kvm_vcpu_kick(struct kvm_vcpu *vcpu) 4569void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
4570{ 4570{
4571 int ipi_pcpu = vcpu->cpu; 4571 int ipi_pcpu = vcpu->cpu;
4572 int cpu = get_cpu(); 4572 int cpu;
4573 4573
4574 if (waitqueue_active(&vcpu->wq)) { 4574 if (waitqueue_active(&vcpu->wq)) {
4575 wake_up_interruptible(&vcpu->wq); 4575 wake_up_interruptible(&vcpu->wq);
@@ -4579,6 +4579,7 @@ void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
4579 * We may be called synchronously with irqs disabled in guest mode, 4579 * We may be called synchronously with irqs disabled in guest mode,
4580 * So need not to call smp_call_function_single() in that case. 4580 * So need not to call smp_call_function_single() in that case.
4581 */ 4581 */
4582 cpu = get_cpu();
4582 if (vcpu->guest_mode && vcpu->cpu != cpu) 4583 if (vcpu->guest_mode && vcpu->cpu != cpu)
4583 smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0); 4584 smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0);
4584 put_cpu(); 4585 put_cpu();