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author | David S. Miller <davem@davemloft.net> | 2012-02-04 16:39:32 -0500 |
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committer | David S. Miller <davem@davemloft.net> | 2012-02-04 16:39:32 -0500 |
commit | dd48dc34fe7639a8b2e22d8b609672f5f81aa7cb (patch) | |
tree | f16ace0ae09edab16bf6d0be9e8280dfbb7100da /drivers/virtio | |
parent | 8d9eb069eafce49307f839783e4a4673414b1fd5 (diff) | |
parent | 5962b35c1de3254a2f03b95efd3b7854b874d7b7 (diff) | |
download | op-kernel-dev-dd48dc34fe7639a8b2e22d8b609672f5f81aa7cb.zip op-kernel-dev-dd48dc34fe7639a8b2e22d8b609672f5f81aa7cb.tar.gz |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'drivers/virtio')
-rw-r--r-- | drivers/virtio/virtio_ring.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 79e1b29..5aa43c3 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -35,7 +35,7 @@ #define virtio_rmb(vq) \ do { if ((vq)->weak_barriers) smp_rmb(); else rmb(); } while(0) #define virtio_wmb(vq) \ - do { if ((vq)->weak_barriers) smp_rmb(); else rmb(); } while(0) + do { if ((vq)->weak_barriers) smp_wmb(); else wmb(); } while(0) #else /* We must force memory ordering even if guest is UP since host could be * running on another CPU, but SMP barriers are defined to barrier() in that @@ -308,9 +308,9 @@ bool virtqueue_kick_prepare(struct virtqueue *_vq) bool needs_kick; START_USE(vq); - /* Descriptors and available array need to be set before we expose the - * new available array entries. */ - virtio_wmb(vq); + /* We need to expose available array entries before checking avail + * event. */ + virtio_mb(vq); old = vq->vring.avail->idx - vq->num_added; new = vq->vring.avail->idx; |