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

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Message-ID: <Pine.LNX.4.64.0712211340210.21721@fbirervta.pbzchgretzou.qr>
Date:	Fri, 21 Dec 2007 13:43:34 +0100 (CET)
From:	Jan Engelhardt <jengelh@...putergmbh.de>
To:	James Courtier-Dutton <James@...erbug.co.uk>
cc:	"J.A. Magallón" <jamagallon@....com>,
	"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 Dec 21 2007 12:08, James Courtier-Dutton wrote:

> That being said, I don't think sse and mmx are available in kernel
> space, so I would have suggested doing all the grunt work in
> userspace would be better for this persons application so that he
> could use sse and mmx etc.
>
They are available, you just need to pay attention not to trash
a process's context.

IIRC this has been done for 387 FPUting. (The 'trigger' thing in
save_i387() in arch/x86/i387_32.c probably.) Probably not for SSE.
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