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To: Pierre Ossman <drzeus-list@drzeus.cx>
Cc: LKML <linux-kernel@vger.kernel.org>, nhorman@redhat.com, hancockr@shaw.ca
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References: <416FCD3E.8010605@drzeus.cx> <41713B79.3080406@drzeus.cx>
From: Roland Dreier <roland@topspin.com>
Date: Sat, 16 Oct 2004 09:03:44 -0700
In-Reply-To: <41713B79.3080406@drzeus.cx> (Pierre Ossman's message of "Sat,
 16 Oct 2004 17:17:13 +0200")
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Subject: Re: Tasklet usage?
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    Pierre> As I was digging through the functions there was one thing
    Pierre> that struck me. The parameter for the tasklet is of type
    Pierre> unsigned long, not void*. Since the parameter in most
    Pierre> cases is a pointer this might cause problems on 64-bit
    Pierre> systems. Or does the kernel do some magic to map kernel
    Pierre> memory in the first 4 GB?

unsigned long will be 64 bits on a 64-bit system.  There are many
places in the Linux kernel where we assume that void * and long are
the same size.

 - Roland
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