linux-kernel - Re: [PATCH] Use descriptor's functions instead of inline assembly

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Date:	Fri, 20 Jul 2007 12:14:48 -0300
From:	Glauber de Oliveira Costa <gcosta@...hat.com>
To:	Frederik Deweerdt <deweerdt@...e.fr>
Cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org, ak@...e.de
Subject: Re: [PATCH] Use descriptor's functions instead of inline assembly

On Fri, 2007-07-20 at 16:23 +0200, Frederik Deweerdt wrote:
> On Fri, Jul 20, 2007 at 10:56:01AM -0300, Glauber de Oliveira Costa wrote:
> > This patch provides a new set of functions for managing the descriptor
> > tables that can be used instead of putting the raw assembly in .c files.
> >     
> > Signed-off-by: Glauber de Oliveira Costa <gcosta@...hat.com>
> > 
> > -	asm volatile ("str %0"  : "=m" (ctxt->tr));
> > +	store_gdt((struct desc_ptr *)&ctxt->gdt_limit);
> > +	store_idt((struct desc_ptr *)&ctxt->idt_limit);
> > +	ctxt->tr = store_tr();
> > 
> Would'nt a store_tr(&ctxt->tr) be more homogeneous here?
Indeed, it would. The main reason I let it this way was to keep it closer to
the i386 paravirt code (which is the main reason I'm sending this
patches - to pave the way for the x86_64 one), but they seem to be
getting an argument for store_tr in current tree. So there's no arguable
advantage on doing it my way at all ;-)

Thanks

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