[GIT,PULL,05/10] KVM: s390: drop out early in kvm_s390_has_irq()
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Message ID 1444745168-21479-6-git-send-email-borntraeger@de.ibm.com
State New
Headers show

Commit Message

Christian Borntraeger Oct. 13, 2015, 2:06 p.m. UTC
From: David Hildenbrand <dahi@linux.vnet.ibm.com>

Let's get rid of the local variable and exit directly if we found
any pending interrupt. This is not only faster, but also better
readable.

Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
---
 arch/s390/kvm/interrupt.c | 20 +++++++++-----------
 1 file changed, 9 insertions(+), 11 deletions(-)

Patch
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diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index 1260f8c..10a0e8b 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -808,23 +808,21 @@  int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu)
 
 int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop)
 {
-	int rc;
+	if (deliverable_irqs(vcpu))
+		return 1;
 
-	rc = !!deliverable_irqs(vcpu);
-
-	if (!rc && kvm_cpu_has_pending_timer(vcpu))
-		rc = 1;
+	if (kvm_cpu_has_pending_timer(vcpu))
+		return 1;
 
 	/* external call pending and deliverable */
-	if (!rc && kvm_s390_ext_call_pending(vcpu) &&
+	if (kvm_s390_ext_call_pending(vcpu) &&
 	    !psw_extint_disabled(vcpu) &&
 	    (vcpu->arch.sie_block->gcr[0] & 0x2000ul))
-		rc = 1;
+		return 1;
 
-	if (!rc && !exclude_stop && kvm_s390_is_stop_irq_pending(vcpu))
-		rc = 1;
-
-	return rc;
+	if (!exclude_stop && kvm_s390_is_stop_irq_pending(vcpu))
+		return 1;
+	return 0;
 }
 
 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)