virtio_ring: Update weak barriers to use dma_wmb/rmb

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This change makes it so that instead of using smp_wmb/rmb which varies
depending on the kernel configuration we can can use dma_wmb/rmb which for
most architectures should be equal to or slightly more strict than
smp_wmb/rmb.

The advantage to this is that these barriers are available to uniprocessor
builds as well so the performance should improve under such a
configuration.

Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

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Alexander Duyck 2015-04-13 21:03:49 +09:30 • committed by Rusty Russell

parent a8557d32fe

commit 9e1a27ea42

1 changed files with 4 additions and 19 deletions

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include/linux/virtio_ring.h

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