[PATCH net-next v5 2/4] net: vhost: replace magic number of lock annotation

xiangxia.m.yue at gmail.com
2018-07-04T04:31:36Z

Use the VHOST_NET_VQ_XXX as a subclass for mutex_lock_nested.

Signed-off-by: Tonghao Zhang <zhangtonghao at didichuxing.com>
Acked-by: Jason Wang <jasowang at redhat.com>
---
 drivers/vhost/net.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index e7cf7d2..62bb8e8 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -484,7 +484,7 @@ static void handle_tx(struct vhost_net *net)
 	bool zcopy, zcopy_used;
 	int sent_pkts = 0;

-	mutex_lock(&vq->mutex);
+	mutex_lock_nested(&vq->mutex, VHOST_NET_VQ_TX);
 	sock = vq->private_data;
 	if (!sock)
 		goto out;
@@ -655,7 +655,7 @@ static int vhost_net_rx_peek_head_len(struct vhost_net *net,
struct sock *sk)
 		/* Flush batched heads first */
 		vhost_rx_signal_used(rvq);
 		/* Both tx vq and rx socket were polled here */
-		mutex_lock_nested(&vq->mutex, 1);
+		mutex_lock_nested(&vq->mutex, VHOST_NET_VQ_TX);
 		vhost_disable_notify(&net->dev, vq);

 		preempt_disable();
@@ -789,7 +789,7 @@ static void handle_rx(struct vhost_net *net)
 	__virtio16 num_buffers;
 	int recv_pkts = 0;

-	mutex_lock_nested(&vq->mutex, 0);
+	mutex_lock_nested(&vq->mutex, VHOST_NET_VQ_RX);
 	sock = vq->private_data;
 	if (!sock)
 		goto out;
--
1.8.3.1