Compiling simple module on Redhat stock kernel.

[Hemen Kapadia <hemen.kapadia@xxxxxxx>]

Hello,

I am trying to compile the following
code on a system which has been booted with RHEL stock kernel. If I boot
the same system with a custom kernel compiled from the source downloaded
from kernel.org it compiles like a charm. However if I boot the system
on the RHEL stock kernel (2.6.9-42.EL) no object is created in the working
directory. 

My session output is as below. I do
not get any errors or warnings while compiling, but the module object is
not being created. I believe I have the required packages installed. Can
anyone help me compile it.

[hemen@localhost simple_module]$ ls -l
total 24
-rw-rw-rw-  1 hemen hemen  26 Dec 20 12:14
Kbuild
-rw-rw-rw-  1 hemen hemen 224 Dec 20 12:14 Makefile
-rw-rw-rw-  1 hemen hemen 377 Dec 18 15:39 simple_module.c
[hemen@localhost simple_module]$ make
make -C /lib/modules/`uname -r`/build M=`pwd` modules
make[1]: Entering directory `/usr/src/kernels/2.6.9-42.EL-i686'
  Building modules, stage 2.
  MODPOST
make[1]: Leaving directory `/usr/src/kernels/2.6.9-42.EL-i686'
[hemen@localhost simple_module]$ ls
Kbuild  Makefile  simple_module.c
[hemen@localhost ~]$ rpm -qa | grep
kernel
kernel-smp-devel-2.6.9-42.EL
kernel-2.6.9-42.EL
kernel-ib-1.0-1
kernel-utils-2.4-13.1.83
kernel-hugemem-devel-2.6.9-42.EL
kernel-devel-2.6.9-42.EL
[hemen@localhost ~]$


Also providing the source, kbuild and
Makefile I am using.



simple_module.c
===============
/* A simple linux kernel module */

/* Include the required headers */
#include <linux/module.h>
#include <linux/kernel.h>

/* The module initialisation function
*/
int init_module(void)
{
        printk(KERN_INFO
"Simple module inserted.\n");
        return
0;
}

/* The module cleanup function */
void cleanup_module()
{
        printk(KERN_INFO
"Removing simple module.\n");
}

Kbuild
======
obj-m := simple_module.o


Makefile
=======
        KERNELDIR
:= /lib/modules/`uname -r`/build

modules:
        $(MAKE)
-C $(KERNELDIR) M=`pwd` modules

modules_install:
        $(MAKE)
-C $(KERNELDIR) M=`pwd` modules_install

clean:
        $(MAKE)
-C $(KERNELDIR) M=`pwd` clean 



Thanks and Regards,
Hemen Kiran Kapadia
Tata Consultancy Services
Mailto: hemen.kapadia@xxxxxxx
Website: http://www.tcs.com
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