summaryrefslogtreecommitdiffstats
path: root/arch/s390
diff options
context:
space:
mode:
authorRadim Krčmář <rkrcmar@redhat.com>2017-06-04 14:43:52 +0200
committerChristoffer Dall <cdall@linaro.org>2017-06-04 16:53:00 +0200
commit2fa6e1e12a024b48b2c7ea39f50205246e027da7 (patch)
treee2c163ec4641fa294e39e5198ede51a74c927797 /arch/s390
parent2387149eade25f32dcf1398811b3d0293181d005 (diff)
downloadop-kernel-dev-2fa6e1e12a024b48b2c7ea39f50205246e027da7.zip
op-kernel-dev-2fa6e1e12a024b48b2c7ea39f50205246e027da7.tar.gz
KVM: add kvm_request_pending
A first step in vcpu->requests encapsulation. Additionally, we now use READ_ONCE() when accessing vcpu->requests, which ensures we always load vcpu->requests when it's accessed. This is important as other threads can change it any time. Also, READ_ONCE() documents that vcpu->requests is used with other threads, likely requiring memory barriers, which it does. Signed-off-by: Radim Krčmář <rkrcmar@redhat.com> [ Documented the new use of READ_ONCE() and converted another check in arch/mips/kvm/vz.c ] Signed-off-by: Andrew Jones <drjones@redhat.com> Acked-by: Christoffer Dall <cdall@linaro.org> Signed-off-by: Christoffer Dall <cdall@linaro.org>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/kvm/kvm-s390.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 689ac48..ad41e0f 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -2440,7 +2440,7 @@ static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu)
{
retry:
kvm_s390_vcpu_request_handled(vcpu);
- if (!vcpu->requests)
+ if (!kvm_request_pending(vcpu))
return 0;
/*
* We use MMU_RELOAD just to re-arm the ipte notifier for the
OpenPOWER on IntegriCloud