disp_lock_exit_nopreempt
disp_lock_exit_nopreempt(&dp->disp_lock);
disp_lock_exit_nopreempt(&dp->disp_lock);
extern void disp_lock_exit_nopreempt(disp_lock_t *);
#define thread_unlock_nopreempt(t) disp_lock_exit_nopreempt((t)->t_lockp)