cld_msg_v2
struct cld_msg_v2 *cmsg;
.msglen = sizeof(struct cld_msg_v2),
struct cld_msg_v2 cu_msg_v2;
__cld_pipe_inprogress_downcall(const struct cld_msg_v2 __user *cmsg,
struct cld_msg_v2 __user *cmsg = (struct cld_msg_v2 __user *)src;