tree 7e54e74c3f7373a04780ad14cb157089c76abeb2
parent 9e3f84ce416663c84a191cb3ead300fc1a4adadc
author Michael S. Tsirkin <mst@redhat.com> 1450347639 +0200
committer Michael S. Tsirkin <mst@redhat.com> 1452624422 +0200

virtio_ring: use virt_store_mb

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>