lwp_setlock
lwp_setlock(l, tspc->spc_mutex);
lwp_setlock(l, spc->spc_lwplock);
lwp_setlock(l, spc->spc_lwplock);
lwp_setlock(l, spc->spc_mutex);
lwp_setlock(l, mp);
lwp_setlock(newl, spc->spc_lwplock);
lwp_setlock(l, spc->spc_mutex);
oldlock = lwp_setlock(l, l->l_cpu->ci_schedstate.spc_mutex);
kmutex_t *lwp_setlock(lwp_t *, kmutex_t *);