linux-kernel - Re: Trying to convert old modules to newer kernels

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Message-Id: <1198937951.9453.22.camel@perihelion>
Date:	Sat, 29 Dec 2007 09:19:11 -0500
From:	Jon Masters <jonathan@...masters.org>
To:	Lennart Sorensen <lsorense@...lub.uwaterloo.ca>
Cc:	"linux-os (Dick Johnson)" <linux-os@...logic.com>,
	Linux kernel <linux-kernel@...r.kernel.org>
Subject: Re: Trying to convert old modules to newer kernels


On Thu, 2007-12-20 at 11:27 -0500, Lennart Sorensen wrote:
> On Thu, Dec 20, 2007 at 11:13:19AM -0500, linux-os (Dick Johnson) wrote:
> > It never gets to the printk(). You were right about the
> > compilation. Somebody changed the kernel to compile with
> > parameter passing in REGISTERS! This means that EVERYTHING
> > needs to be compiled the same way, 'C' calling conventions
> > were not good enough!
> > 
> > FYI, it has been previously shown that passing parameters
> > in registers on register-starved ix86 machines is always
> > a loss, because the registers need to be freed up, either
> > by saving them on the stack or as dummy memory variables.
> > 
> > Now, they've done it to the entire kernel!
> 
> It's a config option.  I think redhat was the first to actually start
> using it on their distributions.  Many distributions don't use it.
> Debian does not use it on their kernels.

And anyway, what's wrong with having the kernel build scripts build the
module for you? ;-)

Jon.


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