Rasp Linux 核心編譯

1. Get Kernel source
git clone https://github.com/raspberrypi/linux.git
cd linux
git checkout rpi-3.15.y

2. Prepare the build and get kernel config:
# zcat /proc/config.gz > .config
# make mrproer

3. Update Makefile

198 ARCH        = arm
199 CROSS_COMPILE   = arm-linux-gnueabihf-

4. Make the source

# make clean
# make

From: http://elinux.org/RPi_Kernel_Compilation