Invaild module format ---insmod in fedora core 2

[fanscat]

when I use insmod to insert a very simple module ( which used in kernel

2.4.* normally) into kernel 2.6.5, system indicate the error!

I've searched by google for two days , but have no idea

anybody has any idea , or please give an example, thankyou!

[puntmuts]

Did FC2 include a version of the modinit tools ? They are needed for a 2.6 kernel.

[fanscat]

so i have!! module-init-tools-3.0 !!

[the_unforgiven]

You can't insert a module compiled for kernel 2.4.x into kernel 2.6.x - if that's what you're trying to do. You have to recompile the module for kernel 2.6.x .

[fanscat]

yes, just I have did something to recompile ,

but have lots of problem ,

could any freinds tell me how to insmod ? (

my system is FC2, kernel-2.6.9 thankyou !

[puntmuts]

Some more, detailed information would be nice, this sounds like 'HELP, my system is not working' , we need more information.
So provide the details about what you were doing and what the errors were.

[fanscat]

thanks !
details:
I want to insert the famous examplle of module in kernel-2.6.9, error:
/************* error below*********************************/
/usr/lib/gcc-lib/i386-redhat-linux/3.3.3/../../../crt1.o(.text+0x1: In function `_start':
: undefined reference to `main'
hello.o(.text+0xf): In function `hello_init':
: undefined reference to `printk'
hello.o(.text+0x2c): In function `hello_exit':
: undefined reference to `printk'
collect2: ld returned 1 exit status
make: *** [hello] Error 1
/************error above **********************************/
/************** helllo. c source code********************/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>

static int hello_init(void){
printk("Hello, world\n");
return 0;
}

static void hello_exit(void){
printk("Goodbye, cruel work\n");
}

module_init(hello_init);
module_exit(hello_exit);
/* end of hello.c */


#my make file is:
ifneq ($(KERNELRELEASE),)
obj-m += hello.o

else
KDIR += /lib/modules/$(shell uname -r)/build/
PWD += $(shell pwd)

default:
$(MAKE) -C $(KDIR)SUBDIRS=$(PWD)modules
endif

/****************need your help!*********************/