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| author | Ingo Molnar <mingo@elte.hu> | 2012-02-07 08:59:29 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2012-02-07 08:59:29 (GMT) |
| commit | 290436c9c61ac983b1bd425da67242a4357c7701 (patch) | |
| tree | 35e1f189b62eb50515600ad607d7fb57fc547870 /drivers/virtio/virtio_ring.c | |
| parent | 623ec991ce0e8cd5791bad656c162fa837635907 (diff) | |
| parent | 62aa2b537c6f5957afd98e29f96897419ed5ebab (diff) | |
| download | linux-fsl-qoriq-290436c9c61ac983b1bd425da67242a4357c7701.tar.xz | |
Merge tag 'v3.3-rc2' into perf/core
Linux 3.3-rc2
Pick up the latest fixes.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/virtio/virtio_ring.c')
| -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; |