使用 GIT 获得Linux Kernel的代码并查看，追踪历史记录

Linux kernel  的官方 GIT地址是：

http://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git

可以从这个地址拿到 kernel 的 代码仓库。

1. 拿代码仓库

git clone git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git  

2. 查看状态：

$ git status  
# On branch master  
nothing to commit (working directory clean)  

3. 更新本地的代码：

$ git pull  
Already up-to-date.  

 

4. 切换到分支：

$ git checkout linux-3.10.y   
Checking out files: 100% (25952/25952), done.  
Switched to branch 'linux-3.10.y'  

 

5. 查看分支信息：

$ git branch    
* linux-3.10.y  
  master 

 

$ git branch  -a  
* linux-3.10.y  
  master  
  remotes/origin/HEAD -> origin/master  
  remotes/origin/linux-2.6.11.y  
  remotes/origin/linux-2.6.12.y  
  remotes/origin/linux-2.6.13.y  
  remotes/origin/linux-2.6.14.y  
  remotes/origin/linux-2.6.15.y  
  remotes/origin/linux-2.6.16.y  
  remotes/origin/linux-2.6.17.y  
  remotes/origin/linux-2.6.18.y  
  remotes/origin/linux-2.6.19.y  
  remotes/origin/linux-2.6.20.y  
  remotes/origin/linux-2.6.21.y  
  remotes/origin/linux-2.6.22.y  
  remotes/origin/linux-2.6.23.y  
  remotes/origin/linux-2.6.24.y  
  remotes/origin/linux-2.6.25.y  
  remotes/origin/linux-2.6.26.y  
  remotes/origin/linux-2.6.27.y  
  remotes/origin/linux-2.6.28.y  
  remotes/origin/linux-2.6.29.y  
  remotes/origin/linux-2.6.30.y  
  remotes/origin/linux-2.6.31.y  
  remotes/origin/linux-2.6.32.y  
  remotes/origin/linux-2.6.33.y  
  remotes/origin/linux-2.6.34.y  
  remotes/origin/linux-2.6.35.y  
  remotes/origin/linux-2.6.36.y  
  remotes/origin/linux-2.6.37.y  
  remotes/origin/linux-2.6.38.y  
  remotes/origin/linux-2.6.39.y  
  remotes/origin/linux-3.0.y  
  remotes/origin/linux-3.1.y  
  remotes/origin/linux-3.10.y  
  remotes/origin/linux-3.11.y  
  remotes/origin/linux-3.12.y  
  remotes/origin/linux-3.13.y  
  remotes/origin/linux-3.14.y  
  remotes/origin/linux-3.2.y  
  remotes/origin/linux-3.3.y  
  remotes/origin/linux-3.4.y  
  remotes/origin/linux-3.5.y  
  remotes/origin/linux-3.6.y  
  remotes/origin/linux-3.7.y  
  remotes/origin/linux-3.8.y  
  remotes/origin/linux-3.9.y  
  remotes/origin/master  

 

 

6. 创建一个新分支：

$ git checkout -b linux-3.10-charles   
Switched to a new branch 'linux-3.10-charles'  

 

$ git branch   
* linux-3.10-charles  
  linux-3.10.y  
  master 

 

7. 修改文件 init/main.c, 加入一行注释，然后 执行

git add .  

 

 

$ git status  
# On branch linux-3.10-charles  
# Changes to be committed:  
#   (use "git reset HEAD <file>..." to unstage)  
#  
#   modified:   init/main.c  
#  

 

 

e$ git add -i  
           staged     unstaged path  
  1:        +2/-0      nothing init/main.c  
  
*** Commands ***  
  1: [s]tatus     2: [u]pdate     3: [r]evert     4: [a]dd untracked  
  5: [p]atch      6: [d]iff   7: [q]uit   8: [h]elp  
What now>   

 

如果选择  revert 命令，相当于 undo  "git add .":

 

What now> r  
           staged     unstaged path  
  1:        +2/-0      nothing [i]nit/main.c  
Revert>>   
reverted one path  
  
*** Commands ***  
  1: [s]tatus     2: [u]pdate     3: [r]evert     4: [a]dd untracked  
  5: [p]atch      6: [d]iff   7: [q]uit   8: [h]elp  
What now> q  

 

这个时候再执行 git status:

$ git status  
# On branch linux-3.10-charles  
# Changes not staged for commit:  
#   (use "git add <file>..." to update what will be committed)  
#   (use "git checkout -- <file>..." to discard changes in working directory)  
#  
#   modified:   init/main.c  
#  
no changes added to commit (use "git add" and/or "git commit -a")  

 

8. 提交修改：

$ git commit -a -m "This is just for testing git"  
[linux-3.10-charles 9eabb78] This is just for testing git  
 1 file changed, 1 insertion(+), 1 deletion(-)  

 

 9. 查看修改记录(git log)：

commit 9eabb788b5c33efed589b1263aedd69b97e592ac  
Author: Taotao Ding <htdkd@hotmail.com>  
Date:   Wed May 7 03:36:55 2014 +0900  
  
    This is just for testing git  
  
commit 5d897eedc505bb8af1f4865ae381eadbfd3bc8c1  
Author: Greg Kroah-Hartman <gregkh@linuxfoundation.org>  
Date:   Tue May 6 07:56:24 2014 -0700  
  
    Linux 3.10.39  
  
commit 6b32172a1d3cffa74067ced96612bd13658d4fcf  
Author: Felipe Balbi <balbi@ti.com>  
Date:   Tue Feb 25 10:58:43 2014 -0600  
  
    usb: musb: avoid NULL pointer dereference  
     

可以看到，修改已经被记录起来了。

 

 

git log  -p  
commit 9eabb788b5c33efed589b1263aedd69b97e592ac  
Author: Taotao Ding <htdkd@hotmail.com>  
Date:   Wed May 7 03:36:55 2014 +0900  
  
    This is just for testing git  
  
diff --git a/init/main.c b/init/main.c  
index e83ac04..febc1e9 100644  
--- a/init/main.c  
+++ b/init/main.c  
@@ -10,7 +10,7 @@  
  */  
   
 #define DEBUG          /* Enable initcall_debug */  
-  
+/* This is a test line for git */  
 #include <linux/types.h>  
 #include <linux/module.h>  
 #include <linux/proc_fs.h>  

 

10： 查看一个文件最近的修改记录：

 

 

$ git log master..HEAD init/main.c  
commit 9eabb788b5c33efed589b1263aedd69b97e592ac  
Author: Taotao Ding <htdkd@hotmail.com>  
Date:   Wed May 7 03:36:55 2014 +0900  
  
    This is just for testing git  
  
commit b7a52f5111bc53ffbfff96330621cbde80df6ba4  
Author: Theodore Ts'o <tytso@mit.edu>  
Date:   Tue Sep 10 10:52:35 2013 -0400  
  
    random: run random_int_secret_init() run after all late_initcalls  
      
    commit 47d06e532e95b71c0db3839ebdef3fe8812fca2c upstream.  
      
    The some platforms (e.g., ARM) initializes their clocks as  
    late_initcalls for some unknown reason.  So make sure  
    random_int_secret_init() is run after all of the late_initcalls are  
    run.  
      
    Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>  
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>  

 

11： 比较两个分支的差异：

 

 

$ git log linux-3.10.y..linux-3.10-charles   
commit 9eabb788b5c33efed589b1263aedd69b97e592ac  
Author: Taotao Ding <htdkd@hotmail.com>  
Date:   Wed May 7 03:36:55 2014 +0900  
  
    This is just for testing git  

当前分支也可写成  HEAD，所以：

 

 

$ git log linux-3.10.y..HEAD  
commit 9eabb788b5c33efed589b1263aedd69b97e592ac  
Author: Taotao Ding <htdkd@hotmail.com>  
Date:   Wed May 7 03:36:55 2014 +0900  
  
    This is just for testing git  

 

reference:

http://www.opensourceforu.com/2011/05/linux-kernel-development-using-git/

 

P.S.

配置 username  和 user.email 的方法：

 git config    user.email "username"

git config   user.email "email@server"

这两个命令改变 .git/config 配置文件 （local)

 

 git config  --global   user.email "username"

git config   --global user.email "email@server"

git config --global core.editor "vim"
则改变全局的 git 配置文件  （～/.gitconfig)