KVM: Replace smp_mb() with smp_load_acquire() in the kvm_flush_remote_tlbs()
smp_load_acquire() is enough here and it's cheaper than smp_mb(). Adding a comment about reusing memory barrier of kvm_make_all_cpus_request() here to keep order between modifications to the page tables and reading mode. Signed-off-by:Lan Tianyu <tianyu.lan@intel.com> Signed-off-by:
Paolo Bonzini <pbonzini@redhat.com>
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