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(parent: 9e3f84c) | patch
virtio_ring: use virt_store_mb
authorMichael S. Tsirkin <mst@redhat.com>
Thu, 17 Dec 2015 10:20:39 +0000 (12:20 +0200)
committerMichael S. Tsirkin <mst@redhat.com>
Tue, 12 Jan 2016 18:47:02 +0000 (20:47 +0200)
commit788e5b3a5da24cc8d93ce2f7c6508181cd7d7fb6
tree7e54e74c3f7373a04780ad14cb157089c76abeb2tree | snapshot (tar.gz zip)
parent9e3f84ce416663c84a191cb3ead300fc1a4adadccommit | diff
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>
drivers/virtio/virtio_ring.c diff | blob | blame | history
include/linux/virtio_ring.h diff | blob | blame | history