lockmgr_xlock_hard
error = lockmgr_xlock_hard(lk, flags, ilk, file, line, lwa);
return (lockmgr_xlock_hard(lk, flags, ilk, file, line,
return (lockmgr_xlock_hard(lk, flags | LK_ADAPTIVE, NULL, file, line, NULL));
return (lockmgr_xlock_hard(lk, flags, ilk, file, line, &lwa));