virtio_ring: switch to dma_XX barriers for rpmsg
virtio is using barriers to order memory accesses, thus
dma_wmb/rmb is a good match.
Before
[mst@tuck linux]$ size drivers/virtio/virtio_ring.o
text data bss dec hex filename
11392 820 0 12212 2fb4 drivers/virtio/virtio_ring.o
After
mst@tuck linux]$ size drivers/virtio/virtio_ring.o
text data bss dec hex filename
11284 820 0 12104 2f48 drivers/virtio/virtio_ring.o
Cc: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: linux-remoteproc@vger.kernel.org
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
diff --git a/include/linux/virtio_ring.h b/include/linux/virtio_ring.h
index bbf3252..fab0213 100644
--- a/include/linux/virtio_ring.h
+++ b/include/linux/virtio_ring.h
@@ -35,7 +35,7 @@
if (weak_barriers)
virt_rmb();
else
- rmb();
+ dma_rmb();
}
static inline void virtio_wmb(bool weak_barriers)
@@ -43,7 +43,7 @@
if (weak_barriers)
virt_wmb();
else
- wmb();
+ dma_wmb();
}
static inline void virtio_store_mb(bool weak_barriers,