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| author |   Michael S. Tsirkin <mst@redhat.com> | 2015-12-17 12:20:39 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2016-01-12 20:47:02 +0200 |
| commit | 788e5b3a5da24cc8d93ce2f7c6508181cd7d7fb6 (patch) | |
| tree | 7e54e74c3f7373a04780ad14cb157089c76abeb2 /drivers/xen/xenbus/xenbus_comms.c | |
| parent | sh: move xchg_cmpxchg to a header by itself (diff) | |
| download | linux-dev-788e5b3a5da24cc8d93ce2f7c6508181cd7d7fb6.tar.xz linux-dev-788e5b3a5da24cc8d93ce2f7c6508181cd7d7fb6.zip | |
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>
Diffstat (limited to 'drivers/xen/xenbus/xenbus_comms.c')
0 files changed, 0 insertions, 0 deletions