KVM: PPC: Book3S HV: Fix preempted vcore list locking
When a vcore gets preempted, we put it on the preempted vcore list for the current CPU. The runner task then calls schedule() and comes back some time later and takes itself off the list. We need to be careful to lock the list that it was put onto, which may not be the list for the current CPU since the runner task may have moved to another CPU. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
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@ -1962,10 +1962,11 @@ static void kvmppc_vcore_preempt(struct kvmppc_vcore *vc)
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static void kvmppc_vcore_end_preempt(struct kvmppc_vcore *vc)
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{
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struct preempted_vcore_list *lp = this_cpu_ptr(&preempted_vcores);
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struct preempted_vcore_list *lp;
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kvmppc_core_end_stolen(vc);
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if (!list_empty(&vc->preempt_list)) {
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lp = &per_cpu(preempted_vcores, vc->pcpu);
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spin_lock(&lp->lock);
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list_del_init(&vc->preempt_list);
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spin_unlock(&lp->lock);
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