[yocto] How do I patch the kernel before it is built?

[autif khan]

>>>>>>>>> R E C I P E
>>>>>>>>>
>>>>>>>>> autif at fpbm:~/data/yocto/poky-edison-6.0/meta-koko/recipes/linux$
>>>>>>>>> cat
>>>>>>>>> linux-yocto_3.0.bbappend
>>>>>>>>> FILESEXTRAPATHS_prepend := "${THISDIR}:"
>>>>>>>>> SRC_URI += " file://linux/drivers/hid/hid-core.c.diff \
>>>>>>>>> file://linux/drivers/hid/hid-ids.h.diff "
>>>>>>>>> PR = "r3"
>>>>>>>>> autif at fpbm:~/data/yocto/poky-edison-6.0/meta-koko/recipes/linux$

Fond the bug - it was a problem in the recipe

FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"

I was missing the ${PN} at the end.

Bruce - Thank you for all the help :-)