--- sys/kern/vfs_mountroot.c    (working copy)	
+++ sys/kern/vfs_mountroot.c    (working copy)	
@@ -179,7 +179,7 @@ 
    mtx_unlock(&root_holds_mtx);
 }
-static void
+void
 set_rootvnode(void)
 {
    struct proc *p;
--- sys/sys/mount.h (working copy)	
+++ sys/sys/mount.h (working copy)	
@@ -836,6 +836,7 @@ 
 struct mntarg *mount_argb(struct mntarg *ma, int flag, const char *name);
 struct mntarg *mount_argf(struct mntarg *ma, const char *name, const char *fmt, ...);
 struct mntarg *mount_argsu(struct mntarg *ma, const char *name, const void *val, int len);
+void    set_rootvnode(void);
 void   statfs_scale_blocks(struct statfs *sf, long max_size);
 struct vfsconf *vfs_byname(const char *);
 struct vfsconf *vfs_byname_kld(const char *, struct thread *td, int *);