I want to apply rt-patch in raspberry-pi image by following (https://docs.yoctoproject.org/3.1.20...tch-the-kernel). So in order to achieve that I created my own meta-layer and put that patch in bblayer of build directory. In order to apply patching i did following steps.

I downloaded patch file from (https://cdn.kernel.org/pub/linux/ker...-rt40.patch.gz) unzip and rename with (patch-5.4.70-rt40.patch)

I put that patch file in yocto/meta-mylayer/recipes-kernel/linux/linux-yocto.

And given patch file's path in yocto/meta-mylayer/recipes-kernel/linux/linux-yocto_4.12.bbappend by following lines FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:" SRC_URI_append = "file://patch-5.4.70-rt40.patch"

when i am trying to bake my recipe : bitbake core-image-base then following error is showing

Loading cache: 100% |############################################| Time: 0:00:01
Loaded 3004 entries from dependency cache.
ERROR: No recipes available for:
/home/nikita/yocto/meta-mylayer/recipes-kernel/linux/linux-yocto_4.12.bbappend

Summary: There was 1 ERROR message shown, returning a non-zero exit code.
Can anyone please suggest me how can I apply rt-patch in my raspberry-image with above method by solving corresponding error.

Thanks in advance
Nikita Gupta