Re: how to export functions

[ninjaboy <n0b0dyn1nj4@xxxxxxxxx>]

2007/7/12, hari krishna angadi <reachtohari@xxxxxxxxx>:
> hi,
>  i am getting -1 Unknown symbol in module when i try to insert the module
> 2.ko
> /* 1.c  */
> #include <linux/kernel.h>
>    #include <linux/init.h>
>    #include <linux/module.h>
>  int example()
> {
>         printk("<1> i am in function");
>         return 0;
> }
>   MODULE_LICENSE("Dual BSD/GPL");
>
>   static int hello_init(void)
>   {
>           printk(KERN_ALERT "Hello, world\n");
>           return 0;
>   }
>
>   static void hello_exit(void)
>   {
>           printk(KERN_ALERT "Goodbye, cruel world\n");
>   }
>
>   module_init(hello_init);
>   module_exit(hello_exit);
>
> / * 2.c */
> #include <linux/kernel.h>
>    #include <linux/init.h>
>    #include <linux/module.h>
>
>   MODULE_LICENSE("Dual BSD/GPL");
> extern  int example();
>   static int world_init(void)
>   {     example();
>           printk(KERN_ALERT "Hello, world\n");
>           return 0;
>   }
>
>   static void world_exit(void)
>   {
>           printk(KERN_ALERT "Goodbye, cruel world\n");
>   }
>
>   module_init(world_init);
>   module_exit(world_exit);
>
>
> i tried to insert 1.ko it inserted inot kernel
> when tried to insert  2.ko
> i get  (-1 Unknown symbol in module)
>     i got some idea i.e  to export the function example how to do?
EXPORT_SYMBOL(example); in 1.c

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