Symbol: lwp_upimutex_lock
usr/src/uts/common/syscall/lwp_sobj.c
1206
error = lwp_upimutex_lock(lp, type, UPIMUTEX_BLOCK, &lwpt);
usr/src/uts/common/syscall/lwp_sobj.c
3062
error = lwp_upimutex_lock(lp, type, UPIMUTEX_TRY, NULL);