If you use yaffs >= 2009-09-18 then this patch is no longer required.
--- kernel/2.6.29.1/series.default (revision 1190)
+++ kernel/2.6.29.1/series.default (working copy)
@@ -10,4 +10,3 @@
balloon3-minipug.patch
balloon3-minipugfb.patch
yaffsconfig.patch -p0
-yaffsrootmode.patch