The install_sources function tries to pick up all the patch documentation and put it into patches.txt. It looks in the wrong place: ${WORKDIR}/${KV}/docs. Instead it should look either in ${WORKDIR}/patches/${KV}/docs or in all of ${WORKDIR}/patches/*/docs. I'll attach a patch for the former.
Created attachment 25224 [details, diff] Patch to do ${KV} -> patches/${KV}
Thanks for pointing this out. This was left in fromt he older eclass, so rather than changing this I would be more inclined to extend it. any dissagreements with somethng like: for file in $(find ${WORKDIR}/patches/*/docs/ -type f)
this has now been changed in 1.26 of kernel-2.eclass Hopefully this would be just fine, but please let me know your comments.