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Linux内核社区贡献指南

  • 2026-02-28 14:31:47
Linux内核社区贡献指南
概述

向Linux内核贡献代码是一个严格但有价值的过程。本指南详细介绍从准备补丁到提交邮件的完整流程,帮助你成功向内核社区贡献代码。

一、准备工作

1.1 获取内核源码

克隆Linus的主线树

git clone https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

cd linux

添加linux-next树(包含下一版本的特性)

git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git

git fetch linux-next

添加稳定版树

git remote add stable https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

git fetch stable

1.2 配置Git

设置用户信息

git config --global user.name "Your Name"

git config --global user.email "your.email@example.com"

设置编辑器

git config --global core.editor vim

配置发送邮件

git config --global sendemail.smtpserver smtp.gmail.com

git config --global sendemail.smtpserverport 587

git config --global sendemail.smtpencryption tls

git config --global sendemail.smtpuser your.email@example.com

设置补丁格式

git config --global format.numbered auto

git config --global format.signoff true

1.3 安装必要工具

代码检查工具

sudo apt install sparse coccinelle

邮件工具

sudo apt install git-email mutt

文档工具

sudo apt install python3-sphinx python3-sphinx-rtd-theme

二、代码规范

2.1 编码风格

// 内核编码风格示例

include <linux/kernel.h>

include <linux/module.h>

/*

  • 函数注释使用kernel-doc格式

  • @param: 参数说明

  • @return: 返回值说明

*/

// 缩进使用8个字符的Tab,不是空格

void example_function(int param)

{

// 大括号位置:函数的开括号另起一行

if (param > 0) {

// 其他语句的开括号在同一行

do_something();

} else {

do_something_else();

}

// 每行最多80个字符(推荐)

// 绝对不超过100个字符

// switch语句

switch (param) {

case 0: // case与switch对齐

break;

case 1:

handle_case_1();

break;

default:

break;

}

}

// 结构体定义

struct example_struct {

int member1;

char member2;

unsigned long member3;

};  // 注意分号位置

// 宏定义

define EXAMPLE_MACRO(x) \

do { \

statement1; \

statement2; \

} while (0)

// 指针声明

char *ptr; // 星号靠近变量名,不是类型

int *a, *b, *c; // 多个指针声明

2.2 使用checkpatch检查

检查单个补丁

./scripts/checkpatch.pl patch-file.patch

检查一系列提交

git format-patch -3 --stdout | ./scripts/checkpatch.pl

检查单个文件

./scripts/checkpatch.pl -f drivers/example/file.c

忽略某些警告

./scripts/checkpatch.pl --ignore LONG_LINE,CAMELCASE patch.patch

自动修复简单问题

./scripts/checkpatch.pl --fix-inplace file.c

2.3 Sparse静态检查

安装sparse

sudo apt install sparse

编译时启用sparse检查

make C=1 drivers/example/ 检查新编译的文件

make C=2 drivers/example/ 检查所有文件

常见sparse警告

  • 地址空间问题(__user, __kernel, __iomem)

  • 锁定问题

  • 字节序问题(__le32, __be32)

三、Git工作流程

3.1 分支管理

基于主线创建工作分支

git checkout -b my-feature origin/master

或基于特定子系统树

git checkout -b my-network-fix net-next/master

保持分支更新

git fetch origin

git rebase origin/master

3.2 提交管理

创建原子提交(每个提交只做一件事)

git add -p 交互式添加部分修改

git commit -s -s 自动添加Signed-off-by

提交信息格式

subsystem: Short description (50 chars max)

Longer description explaining the what and why (72 chars width)

Can have multiple paragraphs.

Fixes: 1234567890ab ("Previous commit subject")

Reported-by: Name email@example.com

Signed-off-by: Your Name your.email@example.com

示例提交信息

cat << 'EOF'

net: ethernet: fix me

最新文章

随机文章

基本 文件 流程 错误 SQL 调试
  1. 请求信息 : 2026-02-28 23:26:57 HTTP/2.0 GET : https://f.mffb.com.cn/a/477217.html
  2. 运行时间 : 0.073627s [ 吞吐率:13.58req/s ] 内存消耗:4,736.08kb 文件加载:140
  3. 缓存信息 : 0 reads,0 writes
  4. 会话信息 : SESSION_ID=d30077e5a12e437f4011cbc7cd2e1821
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  1. CONNECT:[ UseTime:0.000370s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000554s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000270s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000313s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000538s ]
  6. SELECT * FROM `set` [ RunTime:0.000198s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000508s ]
  8. SELECT * FROM `article` WHERE `id` = 477217 LIMIT 1 [ RunTime:0.000337s ]
  9. UPDATE `article` SET `lasttime` = 1772292417 WHERE `id` = 477217 [ RunTime:0.000598s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 67 LIMIT 1 [ RunTime:0.000214s ]
  11. SELECT * FROM `article` WHERE `id` < 477217 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000394s ]
  12. SELECT * FROM `article` WHERE `id` > 477217 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000952s ]
  13. SELECT * FROM `article` WHERE `id` < 477217 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001184s ]
  14. SELECT * FROM `article` WHERE `id` < 477217 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000828s ]
  15. SELECT * FROM `article` WHERE `id` < 477217 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000920s ]
0.075074s