补丁和内核编译

. patch
=======
1. 制作补丁:
    diff -Nur linux-2.6.30 linux-2.6.30.1 > linux-2.6.30.3.patch

2. 打补丁:
    old -> new
    cd old
     patch -p1 < ../linux-2.6.30.3.patch

3. 恢复:
    patch -R < ../linux-2.6.30.3.patch

编译内核
========
. Documentation/kbuild/makefiles.txt

. arch/$(SRCARCH)/kernel/vmlinux.lds

. Makefile
    obj-y += test.o

. Kconfig
    Documentation/kbuild/kconfig-language.txt

    arch/arm/Kconfig

. make = make bzImage + make modules
. -y
    make bzImage
. -m
    make modules
    make modules clean

. 单独编译模块
    make M=drivers/test/ modules
    make M=drivers/test/ modules clean

. 指定内核Makefile并单独编译
    make -C /nfs_rootfs/nfsroot-29/linux-2.6.29/ M=`pwd` modules
    make -C /nfs_rootfs/nfsroot-29/linux-2.6.29/ M=`pwd` modules clean

. 内核模块编程的Makefile

. kerneltrap.org
. kernel.org
. Linux Kernel Mail List
. chinaunix
. linuxforum
. ubuntu

app(posix, libc, qt, )->系统开发->内核->操作系统->数字电路