Re: [PATCH v5 08/14] KVM: ARM: Emulation framework and CP15 emulation

Russell King - ARM Linux
2013-01-14T16:36:42Z

On Tue, Jan 08, 2013 at 01:39:31PM -0500, Christoffer Dall wrote:
> + /*
> + * Check whether this vcpu requires the cache to be flushed on
> + * this physical CPU. This is a consequence of doing dcache
> + * operations by set/way on this vcpu. We do it here to be in
> + * a non-preemptible section.
> + */
> + if (cpumask_test_cpu(cpu, &vcpu->arch.require_dcache_flush)) {
> + cpumask_clear_cpu(cpu, &vcpu->arch.require_dcache_flush);

There is cpumask_test_and_clear_cpu() which may be better for this.