The Linux Kernel Module Programming Guide簡譯(二)續

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The Linux Kernel Module Programming Guide簡譯(二)續
sighofwraith 發表於 2005-6-24 16:48:39

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

 

　　如果你是運行在2.4以後的核心上，你可能會在insmod模組的時候發現下面這樣的話:

 

# 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

 

　　把代碼的認證設定成GPL就可以了。這個認證機制都是在linux/module.h裡面定義的。參考一下下面的代碼就可以了。

 

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");