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Commit 55e49dc4 authored by Michael S. Tsirkin's avatar Michael S. Tsirkin
Browse files

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: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 29dcea88

include/linux/virtio_ring.h

+2 −2
Original line number Diff line number Diff line
@@ -35,7 +35,7 @@ static inline void virtio_rmb(bool weak_barriers) 
	if (weak_barriers)

		virt_rmb();

	else

		rmb();

		dma_rmb();

}



static inline void virtio_wmb(bool weak_barriers)
@@ -43,7 +43,7 @@ static inline void virtio_wmb(bool weak_barriers) 
	if (weak_barriers)

		virt_wmb();

	else

		wmb();

		dma_wmb();

}



static inline void virtio_store_mb(bool weak_barriers,