KVM: s390: don't use kvm lock in interrupt injection code

The kvm lock protects us against vcpus going away, but they only go
away when the virtual machine is shut down. We don't need this
mutex here, so let's get rid of it.

Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index e2f6240584574e7a668d8ac97ae16f21e3758afd..ba89bbbd2ed58f972d4b0df67453a0431d73a2ae 100644 (file)
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -991,7 +991,6 @@ int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
        trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, s390int->type, s390int->parm,
                                   s390int->parm64, 2);
 
-       mutex_lock(&vcpu->kvm->lock);
        li = &vcpu->arch.local_int;
        spin_lock(&li->lock);
        if (inti->type == KVM_S390_PROGRAM_INT)
@@ -1003,7 +1002,6 @@ int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
                li->action_bits |= ACTION_STOP_ON_STOP;
        atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
        spin_unlock(&li->lock);
-       mutex_unlock(&vcpu->kvm->lock);
        kvm_s390_vcpu_wakeup(vcpu);
        return 0;
 }