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virtio: fix typos of memory barriers

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Note: this fixes a bug introduced recently in
7b21e34fd1.

Signed-off-by: Jason Wang <[email protected]>
Acked-by: Michael S. Tsirkin <[email protected]>
Signed-off-by: Rusty Russell <[email protected]>
This commit is contained in:
Jason Wang 2012-01-20 16:16:59 +08:00 • committed by Rusty Russell
commit 4dbc5d9f4f
1 changed files with 1 additions and 1 deletions
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2
drivers/virtio/virtio_ring.c
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@ -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