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Paolo Bonzini authored
The race between creating the irqchip and the first VCPU is currently fixed by checking the presence of an irqchip before updating kvm->online_vcpus, and undoing the whole VCPU creation if someone created the irqchip in the meanwhile. Instead, introduce a new field in struct kvm that will count VCPUs under a mutex, without the atomic access and memory ordering that we need elsewhere to protect the vcpus array. This also plugs the race and is more easily applicable in all similar circumstances. Reviewed-by:
Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by:
Paolo Bonzini <pbonzini@redhat.com>
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