LSFL_RECV_MSG_BLOCKED
if (test_bit(LSFL_RECV_MSG_BLOCKED, &ls->ls_flags)) {
if (!test_bit(LSFL_RECV_MSG_BLOCKED, &ls->ls_flags)) {
set_bit(LSFL_RECV_MSG_BLOCKED, &ls->ls_flags);
clear_bit(LSFL_RECV_MSG_BLOCKED, &ls->ls_flags);