Regarding dependent kernel modules
 

HI,

I have two kernel modules in old linux kernel version 2.6.10. I have to port these .ko modules to kernel version 2.6.27. I have ported it successfully. Since my one of kernel module is using the API of the another kernel modules. I have exported the API made using the EXPORT_SYMBOL and also made that methods extern in header files. I have included that header files in my 2nd modules.

So when I am compiling the first module, it is compiling successully and when i am compiling the 2nd module which is using the API of the first module. It is giving the following errors:

WARNING: "Register_Driver" [/usr/src/linux/drivers/usb/my/device/src/b.ko] undefined!
WARNING: "A_Free" [/usr/src/linux/drivers/usb/my/device/src/b.ko] undefined!

So first i load the module 1 using insmod, it is loaded successfully, But when i try to load another module using the insmod, I am getting the following error:

insmod: error inserting 'b.ko' : -1 unknown symbol in module

and when i saw through dmesg, I am getting following information:

b: no symbol version for Register_Driver
b: unknown symbol Register_Driver
b: no symbol version for A_Free
b: unknown symbol version for A_Free


Can somebody tell the work around for this? Why these warnings coming even?

regards,
dinky

Do the functions (?) come from the first module? Or maybe they are taken from a different place?

Hi Mara,

Thanks for reply. Yes These functions are from first module. So can you please tell why this is happening?

regards,
dinky