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	void *			void *
	rangelock_trywlock(struct rangelock *lock, off_t start, off_t end,			rangelock_trywlock(struct rangelock *lock, off_t start, off_t end,
	struct mtx *ilk)			struct mtx *ilk)
	{			{

	return (rangelock_enqueue(lock, start, end, RL_LOCK_WRITE, ilk, true));			return (rangelock_enqueue(lock, start, end, RL_LOCK_WRITE, ilk, true));
	}			}

				#ifdef INVARIANT_SUPPORT
				void
				_rangelock_cookie_assert(void cookie, int what, const char file, int line)
				{
				struct rl_q_entry *entry;
				int flags;

				MPASS(cookie != NULL);
				entry = cookie;
				flags = entry->rl_q_flags;
				switch (what) {
				case RCA_LOCKED:
				if ((flags & RL_LOCK_GRANTED) == 0)
				panic("rangelock not held @ %s:%d\n", file, line);
				break;
				case RCA_RLOCKED:
				if ((flags & (RL_LOCK_GRANTED \| RL_LOCK_READ)) !=
				(RL_LOCK_GRANTED \| RL_LOCK_READ))
				panic("rangelock not rlocked @ %s:%d\n", file, line);
				break;
				case RCA_WLOCKED:
				if ((flags & (RL_LOCK_GRANTED \| RL_LOCK_WRITE)) !=
				(RL_LOCK_GRANTED \| RL_LOCK_WRITE))
				panic("rangelock not wlocked @ %s:%d\n", file, line);
				break;
				default:
				panic("Unknown rangelock assertion: %d @ %s:%d", what, file,
				line);
				}
				}
				#endif /* INVARIANT_SUPPORT */