A promble about driver

[WhiteFox <wyh817@xxxxxxxxx>]

i wrote a simple driver in broadcom7111(use MIPSs3000),it works in the topbox.
the linux kernel is 2.4.25
the compiler is uclibc-3.3.5
when i insmod the driver,it say:unresolved symbol _gp_disp
what is this mean?
thak you

my code  is:

#define MODULE
#include <linux/module.h>
int init_module(void)
{
 printk("<1>Hello,world\n");
 return 0;
}
void cleanup_module(void)
{
 printk("<1>Good Bye\n");
}