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KVM: s390: use atomic bitops to access pending_irqs bitmap 

Currently we use a mixture of atomic/non-atomic bitops
and the local_int spin lock to protect the pending_irqs bitmap
and interrupt payload data.

We need to use atomic bitops for the pending_irqs bitmap everywhere
and in addition acquire the local_int lock where interrupt data needs
to be protected.

Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Jens Freimann 2014-12-01 16:43:40 +01:00 committed by Christian Borntraeger
parent 467fc29892
commit 9185124e87
1 changed files with 2 additions and 2 deletions
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4
arch/s390/kvm/interrupt.c
View File

@ -929,7 +929,7 @@ static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
li->irq.pgm = irq->u.pgm;
__set_bit(IRQ_PEND_PROG, &li->pending_irqs);
set_bit(IRQ_PEND_PROG, &li->pending_irqs);
return 0;
}
@ -995,7 +995,7 @@ int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
irq->u.extcall.code, 0, 2);
*extcall = irq->u.extcall;
__set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
return 0;
}