diff --git a/sys/kern/vfs_lookup.c b/sys/kern/vfs_lookup.c
index cb0a9c2a216..1252f4c54d3 100644
--- a/sys/kern/vfs_lookup.c
+++ b/sys/kern/vfs_lookup.c
@@ -756,9 +756,7 @@ compute_cn_lkflags(struct mount *mp, int lkflags, int cnflags)
 {
 
 	if (mp == NULL || ((lkflags & LK_SHARED) &&
-	    (!(mp->mnt_kern_flag & MNTK_LOOKUP_SHARED) ||
-	    ((cnflags & ISDOTDOT) &&
-	    (mp->mnt_kern_flag & MNTK_LOOKUP_EXCL_DOTDOT))))) {
+	    !(mp->mnt_kern_flag & MNTK_LOOKUP_SHARED))) {
 		lkflags &= ~LK_SHARED;
 		lkflags |= LK_EXCLUSIVE;
 	}
diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c
index 7442153371a..18965d5cb51 100644
--- a/sys/kern/vfs_subr.c
+++ b/sys/kern/vfs_subr.c
@@ -4405,7 +4405,6 @@ DB_SHOW_COMMAND(mount, db_show_mount)
 	MNT_KERN_FLAG(MNTK_NO_IOPF);
 	MNT_KERN_FLAG(MNTK_RECURSE);
 	MNT_KERN_FLAG(MNTK_UPPER_WAITER);
-	MNT_KERN_FLAG(MNTK_LOOKUP_EXCL_DOTDOT);
 	MNT_KERN_FLAG(MNTK_UNLOCKED_INSMNTQUE);
 	MNT_KERN_FLAG(MNTK_USES_BCACHE);
 	MNT_KERN_FLAG(MNTK_FPLOOKUP);
diff --git a/sys/sys/mount.h b/sys/sys/mount.h
index 15aa7dff1e2..0434aeaa38c 100644
--- a/sys/sys/mount.h
+++ b/sys/sys/mount.h
@@ -486,7 +486,7 @@ struct mntoptnames {
 					   handle i/o state on EFAULT. */
 #define	MNTK_RECURSE		0x00000200 /* pending recursive unmount */
 #define	MNTK_UPPER_WAITER	0x00000400 /* waiting to drain MNTK_UPPER_PENDING */
-#define	MNTK_LOOKUP_EXCL_DOTDOT	0x00000800
+/* UNUSED 			0x00000800 */
 #define	MNTK_UNLOCKED_INSMNTQUE	0x00001000 /* fs does not lock the vnode for insmntque */
 #define	MNTK_UNMAPPED_BUFS	0x00002000
 #define	MNTK_USES_BCACHE	0x00004000 /* FS uses the buffer cache. */