On Mon, 13 Jun 2016 15:25:32 +0200
Paolo Bonzini <pbonzini@xxxxxxxxxx> wrote:
> The new created_vcpus field avoids possible races between enabling
> capabilities and creating VCPUs.
>
> Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
> ---
> arch/s390/kvm/kvm-s390.c | 10 +++++-----
> 1 file changed, 5 insertions(+), 5 deletions(-)
>
> @@ -426,7 +426,7 @@ static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *att
> ret = -EBUSY;
> VM_EVENT(kvm, 3, "%s", "ENABLE: CMMA support");
> mutex_lock(&kvm->lock);
> - if (atomic_read(&kvm->online_vcpus) == 0) {
> + if (kvm->created_vcpus) {
if (!kvm->created_vcpus) {
> kvm->arch.use_cmma = 1;
> ret = 0;
> }
> @@ -467,7 +467,7 @@ static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *att
>
> ret = -EBUSY;
> mutex_lock(&kvm->lock);
> - if (atomic_read(&kvm->online_vcpus) == 0) {
> + if (kvm->created_vcpus) {
dito
> /* gmap_alloc will round the limit up */
> struct gmap *new = gmap_alloc(current->mm, new_limit);
>
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