how to load module to kernel core?

["praveen praveen" <prav_6@hotmail.com>]

   hi,

     I have written a module whose skeletal form is like this:

     //  kernel source (/usr/src/linux/ipc/msg.c


     void (*fn_ptr)(void);

     int msgsnd(parameters)
     {

              ...

             if(fn_ptr)
                 (fn_ptr)();

      }

      // my module (module.c)

      extern void (*fn_ptr)(void);

      void my_func(void)
      {
            ...

       }

       int init_module(void)
       {
             fn_ptr=&my_func;

        }

       When i try to load the module :

        $ cc -c module.c

        $ ld -r -o module module.o /usr/src/linux/ipc/ipc.o

         ./module unresolved symbol shmem_lock,shmem_nopage

        This is the error message i am getting.please tell me how to load a 
module to kernel

        source which has recursive dependency.

        thanks in advance.

       - learner

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