[RFC PATCH v2 6/9] vhost: annotate need reply handling

[David Marchand <david.marchand@redhat.com>]

When a reply from the slave is required (VHOST_USER_NEED_REPLY flag),
a spinlock is taken before sending the message.
This spinlock is released if an error occurs when sending the message, and
once a reply is received.

A problem is that this lock is taken under a branch and annotating
conditionally held locks is not supported.
The code seems currently correct and, while we may rework the code,
it is easier to simply skip checks on slave_req_lock for those helpers.

Signed-off-by: David Marchand <david.marchand@redhat.com>
---
 lib/vhost/vhost_user.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/vhost/vhost_user.c b/lib/vhost/vhost_user.c
index 0cfa2d6f82..273cce5e41 100644
--- a/lib/vhost/vhost_user.c
+++ b/lib/vhost/vhost_user.c
@@ -2854,6 +2854,7 @@ send_vhost_reply(struct virtio_net *dev, int sockfd, struct vhu_msg_context *ctx
 static int
 send_vhost_slave_message(struct virtio_net *dev,
 		struct vhu_msg_context *ctx)
+	RTE_NO_ANNOTATED_LOCK_CHECK
 {
 	int ret;
 
@@ -3165,6 +3166,7 @@ vhost_user_msg_handler(int vid, int fd)
 
 static int process_slave_message_reply(struct virtio_net *dev,
 				       const struct vhu_msg_context *ctx)
+	RTE_NO_ANNOTATED_LOCK_CHECK
 {
 	struct vhu_msg_context msg_reply;
 	int ret;
-- 
2.23.0