[PATCH vhost v8 07/12] virtio_ring: remove unused code

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]


Now, vring_map_one_sg() is only called by virtqueue_map_sgs().
And !use_dma_api is check before vring_map_one_sg(), so we not need to
check !use_dma_api inside vring_map_one_sg().

Signed-off-by: Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx>
 drivers/virtio/virtio_ring.c | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index c185354fcac6..eb207da13735 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -364,16 +364,6 @@ static dma_addr_t vring_map_one_sg(const struct vring_virtqueue *vq,
 				   struct scatterlist *sg,
 				   enum dma_data_direction direction)
-	if (!vq->use_dma_api) {
-		/*
-		 * If DMA is not used, KMSAN doesn't know that the scatterlist
-		 * is initialized by the hardware. Explicitly check/unpoison it
-		 * depending on the direction.
-		 */
-		kmsan_handle_dma(sg_page(sg), sg->offset, sg->length, direction);
-		return (dma_addr_t)sg_phys(sg);
-	}
 	 * We can't use dma_map_sg, because we don't use scatterlists in
 	 * the way it expects (we don't guarantee that the scatterlist

Virtualization mailing list

[Index of Archives]     [KVM Development]     [Libvirt Development]     [Libvirt Users]     [CentOS Virtualization]     [Netdev]     [Ethernet Bridging]     [Linux Wireless]     [Kernel Newbies]     [Security]     [Linux for Hams]     [Netfilter]     [Bugtraq]     [Yosemite Forum]     [MIPS Linux]     [ARM Linux]     [Linux RAID]     [Linux Admin]     [Samba]

  Powered by Linux