couldn't find the kernel version the module was compiled for!

[mauryakk]

Hi,

I m new for this forum. wrote a hello.c kernel program while insmod hello.o, i am getting the message like "couldn't find the kernel version the module was compiled for".

i didn't compile the kernel(2.4.20-, using already present with red hat linux.

Please help me regarding this issue.

[Franklin52]

Linux introduces with version 2.6 a new file naming convention, kernel modules now have a .ko extension instead of the old .o extension.
Try:

insmod hello.ko

Regards

[mauryakk]

Thanks for reply. but my kernel version is 2.4 and how to make .ko any option with gcc command or mv .o to .ko??

[Franklin52]

I apologize, I didn't read the question well, you have to insmod the .o module in version 2.4.
Did you compile the module with the source/headers that match your kernel version?
Check the version number in /usr/src and compare it with the output of the command:

uname -r

Regards

[mauryakk]

I compile with below option, but i checked /lib/modules/2.4.20.8/build/include/ doesn't exist. 2.4.20.8 is the ouput of uname -r.

INCLUDE = -isystem /lib/modules/`uname -r`/build/include/

CFLAGS = -O3 -DMODULE -D__KERNEL__ $(INCLUDE)

in /usr/src nothing is there like 2.4.20.8, its the output of

uname -r

i didn't compile the kernel, using already existing.

[Franklin52]

Do you have the kernel-headers/source installed? If not, try to Google for how to install the proper version for your distro.

Regards