T_TOMASK
t->t_flag &= ~T_TOMASK; \
t->t_flag |= T_TOMASK;
t->t_flag &= ~T_TOMASK;
if (t->t_flag & T_TOMASK) { /* sigsuspend or pollsys */
t->t_flag &= ~T_TOMASK;
if (t->t_flag & T_TOMASK) { /* sigsuspend or pollsys */
t->t_flag &= ~T_TOMASK;
if (t->t_flag & T_TOMASK)
t->t_flag &= ~T_TOMASK;
if (t->t_flag & T_TOMASK)
t->t_flag &= ~T_TOMASK;
t->t_flag |= T_TOMASK;
t->t_flag &= ~T_TOMASK;
curthread->t_flag |= T_TOMASK;