linux-kernel - isapnp: broken API

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Message-ID: <20070223162505.rdtobeij48o40sow@wwwmail.urz.uni-heidelberg.de>
Date:	Fri, 23 Feb 2007 16:25:05 +0100
From:	Sacher Khoudari <Sacher.Khoudari@...d.uni-heidelberg.de>
To:	linux-kernel@...r.kernel.org
Subject: isapnp: broken API

Hi!

I've lately tried to run a ISA card (HP 82341, with drivers from the  
Linux GPIB project, latest version), but the module failed to get  
loaded. Modprobe said it couldn't find a symbol (Undefined symbol  
'isapnp_read_byte'), although it was present in /boot/System.map and  
/proc/kallsyms. After some googleing, trying to compile a new kernel,  
looking into code, etc, I found out what the problem was. The function  
"isapnp_read_byte" was no longer been exported. You can find the line  
in question here [1] (note the #if 0). The patch that did this change  
was this [2] one.

I'm not sure, but as I understand it, it was not intended to comment  
this EXPORT_SYMBOLS(isapnp_read_byte) out. So it probably just  
happened by accident?

I've attached a patch for the latest stable kernel (2.6.20.1). Please  
apply it.

Greetings
Sacher

[1] http://www.gelato.unsw.edu.au/lxr/source/drivers/pnp/isapnp/core.c#L948
[2] http://lkml.org/lkml/2005/6/20/307

View attachment "isapnp.patch" of type "text/x-patch" (458 bytes)