--- ntfs_subr.c.orig	2008-05-07 18:17:01.000000000 +0400
+++ ntfs_subr.c	2008-05-07 18:11:05.000000000 +0400
@@ -40,6 +40,7 @@
 #include <sys/file.h>
 #include <sys/malloc.h>
 #include <sys/lock.h>
+#include <sys/sx.h>
 #include <sys/iconv.h>
 
 /* #define NTFS_DEBUG 1 */
@@ -358,7 +359,8 @@ ntfs_ntget(ip)
 
 	mtx_lock(&ip->i_interlock);
 	ip->i_usecount++;
-	lockmgr(&ip->i_lock, LK_EXCLUSIVE | LK_INTERLOCK, &ip->i_interlock);
+	mtx_unlock(&ip->i_interlock);
+	sx_xlock(&ip->i_lock);
 
 	return 0;
 }
@@ -405,7 +407,7 @@ ntfs_ntlookup(
 	VREF(ip->i_devvp);
 
 	/* init lock and lock the newborn ntnode */
-	lockinit(&ip->i_lock, PINOD, "ntnode", 0, LK_EXCLUSIVE);
+	sx_init(&ip->i_lock, "ntnode");
 	mtx_init(&ip->i_interlock, "ntnode interlock", NULL, MTX_DEF);
 	ntfs_ntget(ip);
 
@@ -447,7 +449,8 @@ ntfs_ntput(ip)
 #endif
 
 	if (ip->i_usecount > 0) {
-		lockmgr(&ip->i_lock, LK_RELEASE|LK_INTERLOCK, &ip->i_interlock);
+		mtx_unlock(&ip->i_interlock);
+		sx_xunlock(&ip->i_lock);
 		return;
 	}
 
@@ -462,9 +465,10 @@ ntfs_ntput(ip)
 		LIST_REMOVE(vap,va_list);
 		ntfs_freentvattr(vap);
 	}
-	lockmgr(&ip->i_lock, LK_RELEASE | LK_INTERLOCK, &ip->i_interlock);
+	mtx_unlock(&ip->i_interlock);
+	sx_xunlock(&ip->i_lock);
 	mtx_destroy(&ip->i_interlock);
-	lockdestroy(&ip->i_lock);
+	sx_destroy(&ip->i_lock);
 	vrele(ip->i_devvp);
 	FREE(ip, M_NTFSNTNODE);
 }
--- ntfs_inode.h.orig	2008-05-07 18:14:59.000000000 +0400
+++ ntfs_inode.h	2008-05-07 15:10:59.000000000 +0400
@@ -41,6 +41,8 @@
 #define	IN_LOADED	0x8000	/* ntvattrs loaded */
 #define	IN_PRELOADED	0x4000	/* loaded from directory entry */
 
+#include <sys/_sx.h>
+
 struct ntnode {
 	struct vnode   *i_devvp;	/* vnode of blk dev we live on */
 	struct cdev *i_dev;		/* Device associated with the inode. */
@@ -53,7 +55,7 @@ struct ntnode {
 	u_int32_t       i_flag;
 
 	/* locking */
-	struct lock	i_lock;
+	struct sx	i_lock;
 	struct mtx	i_interlock;
 	int		i_usecount;