cifs_negotiate_protocol
int cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses,
rc = cifs_negotiate_protocol(0, ses, server);
rc = cifs_negotiate_protocol(xid, ses, server);
rc = cifs_negotiate_protocol(xid, ses, server);
rc = cifs_negotiate_protocol(xid, ses, chan->server);
rc = cifs_negotiate_protocol(0, ses, server);