Date: Fri, 4 Feb 2005 21:26:28 +0100
From: Kronos <kronos@kronoz.cjb.net>
To: linux-kernel@vger.kernel.org
Cc: Rahul Jain <rbj2@oak.njit.edu>
Subject: Re: How to add source files in kernel
Message-ID: <20050204202628.GA14973@dreamland.darkstar.lan>
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Rahul Jain <rbj2@oak.njit.edu> ha scritto:
> The kernel recompilation went without any problems. I wrote loadable
> module programs that can access the functions defined in .c. When I try to
> install these modules, they came back with the following error
> 
> /sbin/insmod x.o
> x.o: unresolved symbol enqueue_sfi
> x.o: unresolved symbol init_skbuff_list
> x.o: unresolved symbol get_head_sfi
> x.o: unresolved symbol search_sfi
> x.o: unresolved symbol enqueue_skbuff_list
> x.o: unresolved symbol init_head_sfi
> x.o:
> Hint: You are trying to load a module without a GPL compatible license
>      and it has unresolved symbols.  Contact the module supplier for
>      assistance, only they can help you.
> 
> make: *** [install] Error 1

You forgot the EXPORT for those symbols, add:

EXPORT_SYMBOL(symbol_name);

to .c file. Or you may have exported the symbols as GPL only
(EXPORT_SYMBOL_GPL) and the module which is not licensed under GPL
cannot see them.

Luca
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