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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>
This commit is contained in:
Jens Freimann 2014-08-11 15:39:43 +02:00 committed by Christian Borntraeger
parent 7939503147
commit 331cbc277e
1 changed files with 0 additions and 2 deletions
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2
arch/s390/kvm/interrupt.c
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@ -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, trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, s390int->type, s390int->parm,
s390int->parm64, 2); s390int->parm64, 2);
mutex_lock(&vcpu->kvm->lock);
li = &vcpu->arch.local_int; li = &vcpu->arch.local_int;
spin_lock(&li->lock); spin_lock(&li->lock);
if (inti->type == KVM_S390_PROGRAM_INT) 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; li->action_bits |= ACTION_STOP_ON_STOP;
atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
spin_unlock(&li->lock); spin_unlock(&li->lock);
mutex_unlock(&vcpu->kvm->lock);
kvm_s390_vcpu_wakeup(vcpu); kvm_s390_vcpu_wakeup(vcpu);
return 0; return 0;
} }