确认当前内核版本号, 下载对应的SRPM包

#确认当前版本号

uname -r

# 到valut.centos.org找到SRPM并下载

# 注意事项

# (1) 确认是否用了plus版本的内核, 是的话SRPM在/centosplus/Source/SPackages/

# (2) 非plus版在以下两个目录: /updates/Source/SPackages, /os/Source/SPackages

wget http://vault.centos.org/6.4/updates/Source/SPackages/kernel-2.6.32-358.14.1.el6.src.rpm

安装SRPM以及相关RPM工具

# 安装SRPM

rpm -ivh kernel-2.6.32-358.14.1.el6.src.rpm

# 安装相关RPM工具

yum install rpm-build redhat-rpm-config patchutils xmlto asciidoc elfutils-libelf-devel zlib-devel binutils-devel newt-devel python-devel perl-ExtUtils-Embed hmaccalc rng-tools kernel-firmware

# 启动rngd服务, 提供足够的熵值

cat /dev/null >/etc/sysconfig/rngd

echo ‘EXTRAOPTIONS=”–rng-device /dev/urandom”’ >/etc/sysconfig/rngd

service rngd start

生成内核源码, 使用diff生成patch文件

# 生成内核源码

cd ~/rpmbuild/SPECS

rpmbuild -bp kernel.spec

# 修改并生成diff文件

cd ~/rpmbuild/BUILD

cp -r kernel-2.6.32-358.14.1.el6 kernel-2.6.32-358.14.1.el6.mine

diff -urpN kernel-2.6.32-358.14.1.el6 kernel-2.6.32-358.14.1.el6.mine > this-patch-to-fix-that-bug.patch

# 将patch拷贝到SOURCES下

cp this-patch-to-fix-that-bug.patch ~/rpmbuild/SOURCES

# 清理

rm -rf ~/rpmbuild/BUILD/kernel-2.6.32-358.14.1.el6*

修改SPEC文件, 生成新的内核RPM包

# 找到以下几行, 再后面添加一行

# Source84: config-s390x-generic-rhel

# Source85: config-powerpc64-debug-rhel

# Source86: config-s390x-debug-rhel

# 新添加行

Source87: this-patch-to-fix-that-bug.patch

Patch001: this-patch-to-fix-that-bug.patch

# (可选) 修改changelog, 找到%changelog这行, 再后插入行:

* Tue Aug 03 2013 Your Name [2.6.32-358.14.1.el6.centos]

- [XXX] path to fix that bug

打包生成新的内核RPM包

# 执行SPEC, 生成过程很长请耐心等待.

# 执行前, 请仔细review上述步骤, 避免出错重来

rpmbuila -ba kernel.spec

# 会生成若干个RPM包, 其中最关键的如下, 使用rpm -ivh安装即可

# kernel-2.6.32-358.14.1.el6.x86_64.rpm

# kernel-devel-2.6.32-358.14.1.el6.x86_64.rpm

# kernel-headers-2.6.32-358.14.1.el6.x86_64.rpm