service: explicitly add comment about donated reference on parameter

Follow-up for: d6a911e906e3fe0fdd357f2120209372574a8406

See my comment: https://github.com/systemd/systemd/pull/31916/commits/d6a911e906e3fe0fdd357f2120209372574a8406#r1557384101

diff --git a/src/core/service.c b/src/core/service.c
index 21f8b47a0c7736fe26db03011073ee0ab8d46b2c..6d0281fcd703cf4f5a8374f5c0e7eba095ba0d6c 100644 (file)
--- a/src/core/service.c
+++ b/src/core/service.c
@@ -4705,7 +4705,7 @@ int service_set_socket_fd(
                 Service *s,
                 int fd,
                 Socket *sock,
-                SocketPeer *peer,
+                SocketPeer *peer, /* reference to object is donated to us on success */
                 bool selinux_context_net) {
 
         _cleanup_free_ char *peer_text = NULL;