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authorChristian Borntraeger <borntraeger@de.ibm.com>2013-06-12 15:54:55 +0400
committerPaolo Bonzini <pbonzini@redhat.com>2013-06-17 19:09:17 +0400
commitd0321a24bf10e2299a997c4747b924f79f70a232 (patch)
treee10307eb964122b951ea0ca56d756092143605bd /arch/s390/kvm/sigp.c
parentb110feaf4d0bbc31802589ea6b956389afdabcee (diff)
downloadlinux-d0321a24bf10e2299a997c4747b924f79f70a232.tar.xz
KVM: s390: Use common waitqueue
Lets use the common waitqueue for kvm cpus on s390. By itself it is just a cleanup, but it should also improve the accuracy of diag 0x44 which is implemented via kvm_vcpu_on_spin. kvm_vcpu_on_spin has an explicit check for waiting on the waitqueue to optimize the yielding. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/s390/kvm/sigp.c')
-rw-r--r--arch/s390/kvm/sigp.c16
1 files changed, 8 insertions, 8 deletions
diff --git a/arch/s390/kvm/sigp.c b/arch/s390/kvm/sigp.c
index 1c48ab2845e0..033c864f1ae8 100644
--- a/arch/s390/kvm/sigp.c
+++ b/arch/s390/kvm/sigp.c
@@ -79,8 +79,8 @@ static int __sigp_emergency(struct kvm_vcpu *vcpu, u16 cpu_addr)
list_add_tail(&inti->list, &li->list);
atomic_set(&li->active, 1);
atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
- if (waitqueue_active(&li->wq))
- wake_up_interruptible(&li->wq);
+ if (waitqueue_active(li->wq))
+ wake_up_interruptible(li->wq);
spin_unlock_bh(&li->lock);
rc = SIGP_CC_ORDER_CODE_ACCEPTED;
VCPU_EVENT(vcpu, 4, "sent sigp emerg to cpu %x", cpu_addr);
@@ -117,8 +117,8 @@ static int __sigp_external_call(struct kvm_vcpu *vcpu, u16 cpu_addr)
list_add_tail(&inti->list, &li->list);
atomic_set(&li->active, 1);
atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
- if (waitqueue_active(&li->wq))
- wake_up_interruptible(&li->wq);
+ if (waitqueue_active(li->wq))
+ wake_up_interruptible(li->wq);
spin_unlock_bh(&li->lock);
rc = SIGP_CC_ORDER_CODE_ACCEPTED;
VCPU_EVENT(vcpu, 4, "sent sigp ext call to cpu %x", cpu_addr);
@@ -145,8 +145,8 @@ static int __inject_sigp_stop(struct kvm_s390_local_interrupt *li, int action)
atomic_set(&li->active, 1);
atomic_set_mask(CPUSTAT_STOP_INT, li->cpuflags);
li->action_bits |= action;
- if (waitqueue_active(&li->wq))
- wake_up_interruptible(&li->wq);
+ if (waitqueue_active(li->wq))
+ wake_up_interruptible(li->wq);
out:
spin_unlock_bh(&li->lock);
@@ -250,8 +250,8 @@ static int __sigp_set_prefix(struct kvm_vcpu *vcpu, u16 cpu_addr, u32 address,
list_add_tail(&inti->list, &li->list);
atomic_set(&li->active, 1);
- if (waitqueue_active(&li->wq))
- wake_up_interruptible(&li->wq);
+ if (waitqueue_active(li->wq))
+ wake_up_interruptible(li->wq);
rc = SIGP_CC_ORDER_CODE_ACCEPTED;
VCPU_EVENT(vcpu, 4, "set prefix of cpu %02x to %x", cpu_addr, address);