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KVM: s390: optimize float int lock: spin_lock_bh --> spin_lock

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The floating interrupt lock is only taken in process context. We can
replace all spin_lock_bh with standard spin_lock calls.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Christian Ehrhardt <ehrhardt@de.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Christian Borntraeger
2009-05-12 17:21:50 +02:00
committed by Avi Kivity
parent ca8723023f
commit b037a4f34e
4 changed files with 22 additions and 22 deletions
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16
arch/s390/kvm/sigp.c
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@@ -52,7 +52,7 @@ static int __sigp_sense(struct kvm_vcpu *vcpu, u16 cpu_addr,
if (cpu_addr >= KVM_MAX_VCPUS)
return 3; /* not operational */
spin_lock_bh(&fi->lock);
spin_lock(&fi->lock);
if (fi->local_int[cpu_addr] == NULL)
rc = 3; /* not operational */
else if (atomic_read(fi->local_int[cpu_addr]->cpuflags)
@@ -64,7 +64,7 @@ static int __sigp_sense(struct kvm_vcpu *vcpu, u16 cpu_addr,
*reg |= SIGP_STAT_STOPPED;
rc = 1; /* status stored */
}
spin_unlock_bh(&fi->lock);
spin_unlock(&fi->lock);
VCPU_EVENT(vcpu, 4, "sensed status of cpu %x rc %x", cpu_addr, rc);
return rc;
@@ -86,7 +86,7 @@ static int __sigp_emergency(struct kvm_vcpu *vcpu, u16 cpu_addr)
inti->type = KVM_S390_INT_EMERGENCY;
spin_lock_bh(&fi->lock);
spin_lock(&fi->lock);
li = fi->local_int[cpu_addr];
if (li == NULL) {
rc = 3; /* not operational */
@@ -102,7 +102,7 @@ static int __sigp_emergency(struct kvm_vcpu *vcpu, u16 cpu_addr)
spin_unlock_bh(&li->lock);
rc = 0; /* order accepted */
unlock:
spin_unlock_bh(&fi->lock);
spin_unlock(&fi->lock);
VCPU_EVENT(vcpu, 4, "sent sigp emerg to cpu %x", cpu_addr);
return rc;
}
@@ -123,7 +123,7 @@ static int __sigp_stop(struct kvm_vcpu *vcpu, u16 cpu_addr, int store)
inti->type = KVM_S390_SIGP_STOP;
spin_lock_bh(&fi->lock);
spin_lock(&fi->lock);
li = fi->local_int[cpu_addr];
if (li == NULL) {
rc = 3; /* not operational */
@@ -142,7 +142,7 @@ static int __sigp_stop(struct kvm_vcpu *vcpu, u16 cpu_addr, int store)
spin_unlock_bh(&li->lock);
rc = 0; /* order accepted */
unlock:
spin_unlock_bh(&fi->lock);
spin_unlock(&fi->lock);
VCPU_EVENT(vcpu, 4, "sent sigp stop to cpu %x", cpu_addr);
return rc;
}
@@ -188,7 +188,7 @@ static int __sigp_set_prefix(struct kvm_vcpu *vcpu, u16 cpu_addr, u32 address,
if (!inti)
return 2; /* busy */
spin_lock_bh(&fi->lock);
spin_lock(&fi->lock);
li = fi->local_int[cpu_addr];
if ((cpu_addr >= KVM_MAX_VCPUS) || (li == NULL)) {
@@ -220,7 +220,7 @@ static int __sigp_set_prefix(struct kvm_vcpu *vcpu, u16 cpu_addr, u32 address,
out_li:
spin_unlock_bh(&li->lock);
out_fi:
spin_unlock_bh(&fi->lock);
spin_unlock(&fi->lock);
return rc;
}