virtio_ring: use virt_store_mb

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We need a full barrier after writing out event index, using
virt_store_mb there seems better than open-coding.  As usual, we need a
wrapper to account for strong barriers.

It's tempting to use this in vhost as well, for that, we'll
need a variant of smp_store_mb that works on __user pointers.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>

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Michael S. Tsirkin 2015-12-17 12:20:39 +02:00

parent 9e3f84ce41

commit 788e5b3a5d

2 changed files with 20 additions and 6 deletions

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include/linux/virtio_ring.h

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