Subject: linux-next: manual merge of the vhost tree with the net-next tree

From: Stephen Rothwell <[email-masked]>
Date: Fri, 23 Jun 2023 13:04:43 +1000

Hi all,

Today's linux-next merge of the vhost tree got a conflict in:

  drivers/net/virtio_net.c

between commit:

  80f50f918c6e ("virtio_net: separate the logic of freeing the rest mergeable buf")

from the net-next tree and commit:

  21081476b808 ("virtio_net: support dma premapped")

from the vhost tree.

I fixed it up (see below) and can carry the fix as necessary. This
is now fixed as far as linux-next is concerned, but any non trivial
conflicts should be mentioned to your upstream maintainer when your tree
is submitted for merging.  You may also want to consider cooperating
with the maintainer of the conflicting tree to minimise any particularly
complex conflicts.

-- 
Cheers,
Stephen Rothwell

diff --cc drivers/net/virtio_net.c
index 0db14f6b87d3,d67b36fdba0d..000000000000
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@@ -1128,28 -1136,6 +1233,28 @@@ err
  	return NULL;
  }
  
 +static void mergeable_buf_free(struct receive_queue *rq, int num_buf,
 +			       struct net_device *dev,
 +			       struct virtnet_rq_stats *stats)
 +{
 +	struct page *page;
 +	void *buf;
 +	int len;
 +
 +	while (num_buf-- > 1) {
- 		buf = virtqueue_get_buf(rq->vq, &len);
++		buf = virtnet_rq_get_buf(rq, &len, NULL);
 +		if (unlikely(!buf)) {
 +			pr_debug("%s: rx error: %d buffers missing\n",
 +				 dev->name, num_buf);
 +			dev->stats.rx_length_errors++;
 +			break;
 +		}
 +		stats->bytes += len;
 +		page = virt_to_head_page(buf);
 +		put_page(page);
 +	}
 +}
 +
  /* Why not use xdp_build_skb_from_frame() ?
   * XDP core assumes that xdp frags are PAGE_SIZE in length, while in
   * virtio-net there are 2 points that do not match its requirements: