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diff --git a/sys/fs/ntfs/ntfs_ihash.c b/sys/fs/ntfs/ntfs_ihash.c
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+/* $NetBSD: ntfs_ihash.c,v 1.5 1999/09/30 16:56:40 jdolecek Exp $ */
+
+/*
+ * Copyright (c) 1982, 1986, 1989, 1991, 1993, 1995
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * @(#)ufs_ihash.c 8.7 (Berkeley) 5/17/95
+ * $FreeBSD$
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/lock.h>
+#include <sys/vnode.h>
+#include <sys/malloc.h>
+#include <sys/proc.h>
+#include <sys/mount.h>
+
+#include <ntfs/ntfs.h>
+#include <ntfs/ntfs_inode.h>
+#include <ntfs/ntfs_ihash.h>
+
+MALLOC_DEFINE(M_NTFSNTHASH, "NTFS nthash", "NTFS ntnode hash tables");
+
+/*
+ * Structures associated with inode cacheing.
+ */
+static LIST_HEAD(nthashhead, ntnode) *ntfs_nthashtbl;
+static u_long ntfs_nthash; /* size of hash table - 1 */
+#define NTNOHASH(device, inum) (&ntfs_nthashtbl[(minor(device) + (inum)) & ntfs_nthash])
+#ifndef NULL_SIMPLELOCKS
+static struct simplelock ntfs_nthash_slock;
+#endif
+struct lock ntfs_hashlock;
+
+/*
+ * Initialize inode hash table.
+ */
+void
+ntfs_nthashinit()
+{
+ lockinit(&ntfs_hashlock, PINOD, "ntfs_nthashlock", 0, 0);
+ ntfs_nthashtbl = HASHINIT(desiredvnodes, M_NTFSNTHASH, M_WAITOK,
+ &ntfs_nthash);
+ simple_lock_init(&ntfs_nthash_slock);
+}
+
+/*
+ * Use the device/inum pair to find the incore inode, and return a pointer
+ * to it. If it is in core, return it, even if it is locked.
+ */
+struct ntnode *
+ntfs_nthashlookup(dev, inum)
+ dev_t dev;
+ ino_t inum;
+{
+ struct ntnode *ip;
+
+ simple_lock(&ntfs_nthash_slock);
+ for (ip = NTNOHASH(dev, inum)->lh_first; ip; ip = ip->i_hash.le_next)
+ if (inum == ip->i_number && dev == ip->i_dev)
+ break;
+ simple_unlock(&ntfs_nthash_slock);
+
+ return (ip);
+}
+
+/*
+ * Insert the ntnode into the hash table.
+ */
+void
+ntfs_nthashins(ip)
+ struct ntnode *ip;
+{
+ struct nthashhead *ipp;
+
+ simple_lock(&ntfs_nthash_slock);
+ ipp = NTNOHASH(ip->i_dev, ip->i_number);
+ LIST_INSERT_HEAD(ipp, ip, i_hash);
+ ip->i_flag |= IN_HASHED;
+ simple_unlock(&ntfs_nthash_slock);
+}
+
+/*
+ * Remove the inode from the hash table.
+ */
+void
+ntfs_nthashrem(ip)
+ struct ntnode *ip;
+{
+ simple_lock(&ntfs_nthash_slock);
+ if (ip->i_flag & IN_HASHED) {
+ ip->i_flag &= ~IN_HASHED;
+ LIST_REMOVE(ip, i_hash);
+#ifdef DIAGNOSTIC
+ ip->i_hash.le_next = NULL;
+ ip->i_hash.le_prev = NULL;
+#endif
+ }
+ simple_unlock(&ntfs_nthash_slock);
+}
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