The Linux Kernel Module Programming Guide简译(二)续 （转载）

转载
The Linux Kernel Module Programming Guide简译(二)续
sighofwraith 发表于 2005-6-24 16:48:39

2.5. Hello World (part 4): Licensing and Module Documentation

 

　　如果你是运行在2.4以后的内核上，你可能会在insmod模块的时候发现下面这样的话:

 

# insmod hello-3.o Warning: loading hello-3.o will taint the kernel: no license   See http://www.tux.org/lkml/#export-tainted for information about tainted modules Hello, world 3 Module hello-3 loaded, with warnings

 

　　把代码的认证设置成GPL就可以了。这个认证机制都是在linux/module.h里面定义的。参考一下下面的代码就可以了。

 

Example 2-6. hello-4.c

/*  hello-4.c - Demonstrates module documentation.  */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> #define DRIVER_AUTHOR "Peiter Jay Salzman <p@dirac.org>" #define DRIVER_DESC   "A sample driver"   int init_hello_3(void); void cleanup_hello_3(void);     static int init_hello_4(void) {    printk(KERN_ALERT "Hello, world 4/n");    return 0; }     static void cleanup_hello_4(void) {    printk(KERN_ALERT "Goodbye, world 4/n"); }     module_init(init_hello_4); module_exit(cleanup_hello_4);     /*  You can use strings, like this:  */ MODULE_LICENSE("GPL");           // Get rid of taint message by declaring code as GPL.   /*  Or with defines, like this:  */ MODULE_AUTHOR(DRIVER_AUTHOR);    // Who wrote this module? MODULE_DESCRIPTION(DRIVER_DESC); // What does this module do?   /*  This module uses /dev/testdevice.  The MODULE_SUPPORTED_DEVICE macro might be used in  *  the future to help automatic configuration of modules, but is currently unused other  *  than for documentation purposes.  */ MODULE_SUPPORTED_DEVICE("testdevice");