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

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Message-ID: <20071220162700.GF2308@csclub.uwaterloo.ca>
Date:	Thu, 20 Dec 2007 11:27:00 -0500
From:	lsorense@...lub.uwaterloo.ca (Lennart Sorensen)
To:	"linux-os (Dick Johnson)" <linux-os@...logic.com>
Cc:	Linux kernel <linux-kernel@...r.kernel.org>
Subject: Re: Trying to convert old modules to newer kernels

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.

--
Len Sorensen
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