RP3 make kernelhttps://www.raspberrypi.com/documentation/computers/linux_kernel.html
Raspberry Pi 2/3 Default Build Configuration
cd linux
KERNEL=kernel7
make bcm2709_defconfig
Build and install the kernel, modules and Device Tree blobs; this step takes a long time...
make -j4 zImage modules dtbs
sudo make modules_install
sudo cp arch/arm/boot/dts/*.dtb /boot/
sudo cp arch/arm/boot/dts/overlays/*.dtb* /boot/overlays/
sudo cp arch/arm/boot/dts/overlays/README /boot/overlays/
sudo scripts/mkknlimg arch/arm/boot/zImage /boot/$KERNEL.img