linux-kernel - Re: PATCH] adding wistron_btns support for X86

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Date:	Wed, 02 Jan 2008 23:31:09 +0100
From:	Rémi Hérilier <rherilier@...oo.fr>
To:	Carlos Corbacho <carlos@...angeworlds.co.uk>
CC:	linux-kernel@...r.kernel.org, dtor@...l.ru,
	linux-input@...r.kernel.org
Subject: Re: PATCH] adding wistron_btns support for X86_64 systems.

Carlos Corbacho wrote:
> (CC'ing linux-input, as that is the relevant subsystem list for wistron-btns).
> 
> Rémi Hérilier wrote:
>> To use my previous patch (wistron_btns support for fujitsu-siemens amilo
>> pro edition v3505) with my laptop, I need to make the wistron module
>> compile for x86_64. It is based on Linux 2.4.24-rc4 too.
> 
> NAK.
> 
> You cannot make 32 bit BIOS calls in a 64 bit OS.
> 
> This will (and does) segfault on x86-64 (tested on my Aspire 5020, where  
> call_bios wistron-btns just segfaults on x86-64 with this patch).
> 
> This is a known issue, and the reason why wistron-btns (and the out-of-tree 
> acerhk) have not been ported to x86-64.
> 
> -Carlos

Yes, in theory, this must segfault on x86-64.

In pratice, there is one laptop where it seems to works (no problem
for 3 weeks). A good reason to find why.


Best regards

Remi Herilier
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