提交 108b5669 编写于 作者: M Michael S. Tsirkin 提交者: Avi Kivity

KVM: switch pit creation to slots_lock

switch pit creation to slots_lock. slots_lock is already taken for read
everywhere, so we only need to take it for write when creating pit.
This is in preparation to removing in_range and kvm->lock around it.
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>
上级 d5c2dcc3
......@@ -2188,7 +2188,7 @@ long kvm_arch_vm_ioctl(struct file *filp,
sizeof(struct kvm_pit_config)))
goto out;
create_pit:
mutex_lock(&kvm->lock);
down_write(&kvm->slots_lock);
r = -EEXIST;
if (kvm->arch.vpit)
goto create_pit_unlock;
......@@ -2197,7 +2197,7 @@ long kvm_arch_vm_ioctl(struct file *filp,
if (kvm->arch.vpit)
r = 0;
create_pit_unlock:
mutex_unlock(&kvm->lock);
up_write(&kvm->slots_lock);
break;
case KVM_IRQ_LINE_STATUS:
case KVM_IRQ_LINE: {
......
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