netdev - [PATCH net-next] net: virtio: unify code to init stats

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Message-ID: <fb91a4ec2224c36adda854314940304d708d59ef.1718869408.git.mst@redhat.com>
Date: Thu, 20 Jun 2024 03:44:53 -0400
From: "Michael S. Tsirkin" <mst@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: Jason Wang <jasowang@...hat.com>,
	Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
	Eugenio Pérez <eperezma@...hat.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	virtualization@...ts.linux.dev, netdev@...r.kernel.org,
	Jiri Pirko <jiri@...nulli.us>
Subject: [PATCH net-next] net: virtio: unify code to init stats

Moving initialization of stats structure into
__free_old_xmit reduces the code size slightly.
It also makes it clearer that this function shouldn't
be called multiple times on the same stats struct.

Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
---

Especially important now that Jiri's patch for BQL has been merged.
Lightly tested.

 drivers/net/virtio_net.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 283b34d50296..c2ce8de340f7 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -383,6 +383,8 @@ static void __free_old_xmit(struct send_queue *sq, bool in_napi,
 	unsigned int len;
 	void *ptr;
 
+	stats->bytes = stats->packets = 0;
+
 	while ((ptr = virtqueue_get_buf(sq->vq, &len)) != NULL) {
 		++stats->packets;
 
@@ -828,7 +830,7 @@ static void virtnet_rq_unmap_free_buf(struct virtqueue *vq, void *buf)
 
 static void free_old_xmit(struct send_queue *sq, bool in_napi)
 {
-	struct virtnet_sq_free_stats stats = {0};
+	struct virtnet_sq_free_stats stats;
 
 	__free_old_xmit(sq, in_napi, &stats);
 
@@ -979,7 +981,7 @@ static int virtnet_xdp_xmit(struct net_device *dev,
 			    int n, struct xdp_frame **frames, u32 flags)
 {
 	struct virtnet_info *vi = netdev_priv(dev);
-	struct virtnet_sq_free_stats stats = {0};
+	struct virtnet_sq_free_stats stats;
 	struct receive_queue *rq = vi->rq;
 	struct bpf_prog *xdp_prog;
 	struct send_queue *sq;
-- 
MST