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authorGleb Natapov <gleb@redhat.com>2009-08-24 11:54:26 +0300
committerAvi Kivity <avi@redhat.com>2009-12-03 09:32:08 +0200
commit680b3648ba89c44ac8d0316f78a0d6e147b88809 (patch)
treeb2b40034c4c33affef8b89822673cca835874651 /arch/ia64/kvm/kvm-ia64.c
parenteba0226bdfffe262e72b8360e4d0d12070e9a0f0 (diff)
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KVM: Drop kvm->irq_lock lock from irq injection path
The only thing it protects now is interrupt injection into lapic and this can work lockless. Even now with kvm->irq_lock in place access to lapic is not entirely serialized since vcpu access doesn't take kvm->irq_lock. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/ia64/kvm/kvm-ia64.c')
-rw-r--r--arch/ia64/kvm/kvm-ia64.c2
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
index 4a983147f6e..f534e0f6bb0 100644
--- a/arch/ia64/kvm/kvm-ia64.c
+++ b/arch/ia64/kvm/kvm-ia64.c
@@ -982,10 +982,8 @@ long kvm_arch_vm_ioctl(struct file *filp,
goto out;
if (irqchip_in_kernel(kvm)) {
__s32 status;
- mutex_lock(&kvm->irq_lock);
status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
irq_event.irq, irq_event.level);
- mutex_unlock(&kvm->irq_lock);
if (ioctl == KVM_IRQ_LINE_STATUS) {
irq_event.status = status;
if (copy_to_user(argp, &irq_event,