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Michael S. Tsirkin authored
drivers/xen/events/events_fifo.c uses rmb() to communicate with the other side. For guests compiled with CONFIG_SMP, smp_rmb would be sufficient, so rmb() here is only needed if a non-SMP guest runs on an SMP host. Switch to the virt_rmb barrier which serves this exact purpose. Pull in asm/barrier.h here to make sure the file is self-contained. Suggested-by:
David Vrabel <david.vrabel@citrix.com> Signed-off-by:
Michael S. Tsirkin <mst@redhat.com> Acked-by:
David Vrabel <david.vrabel@citrix.com> Acked-by:
Peter Zijlstra (Intel) <peterz@infradead.org>
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