LSFL_RUNNING
return !test_bit(LSFL_RUNNING, &ls->ls_flags);
clear_bit(LSFL_RUNNING, &ls->ls_flags);
if (!test_bit(LSFL_RUNNING, &ls->ls_flags)) {
new = test_and_clear_bit(LSFL_RUNNING, &ls->ls_flags);
set_bit(LSFL_RUNNING, &ls->ls_flags);