gentoo-overlay/sys-freebsd/freebsd-sources/files/freebsd-sources-7.0-tmpfs_whiteout_stub.patch

diff -ur sys/fs/tmpfs.orig/tmpfs_vnops.c sys/fs/tmpfs/tmpfs_vnops.c
--- sys/fs/tmpfs.orig/tmpfs_vnops.c	2008-06-22 12:17:48 -0300
+++ sys/fs/tmpfs/tmpfs_vnops.c	2008-06-28 12:05:10 -0300
@@ -1459,6 +1459,30 @@
 	return (0);
 }
 
+
+/* --------------------------------------------------------------------- */
+/* This does absolutely nothing */
+#ifdef GENTOO_LIVECD
+static int
+tmpfs_whiteout(struct vop_whiteout_args *ap)
+{
+	switch (ap->a_flags) {
+	case LOOKUP:
+		return (0);
+		break;
+	case CREATE:
+		return(EOPNOTSUPP);
+		break;
+	case DELETE:
+		return (0);
+		break;
+	default:
+		return(EOPNOTSUPP);
+	}
+	return(0);
+}
+#endif
+
 /* --------------------------------------------------------------------- */
 
 /*
@@ -1484,6 +1508,9 @@
 	.vop_mkdir =			tmpfs_mkdir,
 	.vop_rmdir =			tmpfs_rmdir,
 	.vop_symlink =			tmpfs_symlink,
+#ifdef GENTOO_LIVECD
+	.vop_whiteout =			tmpfs_whiteout,
+#endif
 	.vop_readdir =			tmpfs_readdir,
 	.vop_readlink =			tmpfs_readlink,
 	.vop_inactive =			tmpfs_inactive,