Yocto apply kernel patch

We recommend changing the kernel outside of Yocto to reduce the integration and test cycle time. Please follow the instructions in this article: Build U-Boot and Linux Kernel from Source Code After several integration and test cycles you should come up with a devicetree file and kernel configuration that fits your custom application.The "virgin" -rt patch from kernel.org doesn't apply cleanly. First off there is a slight version mismatch and secondly this is the raspberrypi kernel, not a pure upstream kernel. Is there a way to patch a patch before it gets applied? If it could be fetched from kernel.org then patched before applying that would be ideal! The diff isn't that ...