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-rw-r--r--arch/s390/kvm/gaccess.c18
1 files changed, 6 insertions, 12 deletions
diff --git a/arch/s390/kvm/gaccess.c b/arch/s390/kvm/gaccess.c
index 6dc0ad9c7050..8f195fa904a1 100644
--- a/arch/s390/kvm/gaccess.c
+++ b/arch/s390/kvm/gaccess.c
@@ -229,12 +229,10 @@ static void ipte_lock_simple(struct kvm_vcpu *vcpu)
goto out;
ic = &vcpu->kvm->arch.sca->ipte_control;
do {
- old = *ic;
- barrier();
+ old = READ_ONCE(*ic);
while (old.k) {
cond_resched();
- old = *ic;
- barrier();
+ old = READ_ONCE(*ic);
}
new = old;
new.k = 1;
@@ -253,8 +251,7 @@ static void ipte_unlock_simple(struct kvm_vcpu *vcpu)
goto out;
ic = &vcpu->kvm->arch.sca->ipte_control;
do {
- old = *ic;
- barrier();
+ old = READ_ONCE(*ic);
new = old;
new.k = 0;
} while (cmpxchg(&ic->val, old.val, new.val) != old.val);
@@ -269,12 +266,10 @@ static void ipte_lock_siif(struct kvm_vcpu *vcpu)
ic = &vcpu->kvm->arch.sca->ipte_control;
do {
- old = *ic;
- barrier();
+ old = READ_ONCE(*ic);
while (old.kg) {
cond_resched();
- old = *ic;
- barrier();
+ old = READ_ONCE(*ic);
}
new = old;
new.k = 1;
@@ -288,8 +283,7 @@ static void ipte_unlock_siif(struct kvm_vcpu *vcpu)
ic = &vcpu->kvm->arch.sca->ipte_control;
do {
- old = *ic;
- barrier();
+ old = READ_ONCE(*ic);
new = old;
new.kh--;
if (!new.kh)