exporting symbol problem

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Hi all,
I am using fedora linux 2.6.9-1.667 for developing kernel module .

i am exporting one function by using export symbol from one module and
trying to call that exported function in to second module but whenever
i am compiling the second module i am getting msg as follows

*** Warning: "unregister_sd_host_device" [/root/sd_stack/sd_host/
sdhost.ko] undefined!

i tried to find the exported function in to the symbol table also but
i am unable to find the symbole table also

i tried following thing

cat /proc/ksyms
cat /proc/kallsyms

i am unable to understand what is happening here can anyone help me to
solve this proble as i am little bit new to fedora linux enviornment.

any help is greatly appreciated.

Regards

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