linux-kernel - Re: [PATCH] ptrace: unify FDPIC implementations

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Message-ID: <20100216011041.GB4889@linux-sh.org>
Date:	Tue, 16 Feb 2010 10:10:41 +0900
From:	Paul Mundt <lethal@...ux-sh.org>
To:	Mike Frysinger <vapier@...too.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Roland McGrath <roland@...hat.com>,
	David Howells <dhowells@...hat.com>,
	Oleg Nesterov <oleg@...hat.com>,
	uclinux-dist-devel@...ckfin.uclinux.org, linux-sh@...r.kernel.org
Subject: Re: [PATCH] ptrace: unify FDPIC implementations

On Mon, Feb 15, 2010 at 07:30:29PM -0500, Mike Frysinger wrote:
> The Blackfin/FRV/SuperH guys all have the same exact FDPIC ptrace code in
> their arch handlers (since they were probably copied & pasted).  Since
> these ptrace interfaces are an arch independent aspect of the FDPIC code,
> unify them in the common ptrace code so new FDPIC ports don't need to copy
> and paste this fundamental stuff yet again.
> 
> Signed-off-by: Mike Frysinger <vapier@...too.org>
> Acked-by: Roland McGrath <roland@...hat.com>
> Acked-by: David Howells <dhowells@...hat.com>
> Acked-by: Paul Mundt <lethal@...ux-sh.org>

Just to follow up on this, this code obviously expects consistent entries
in mm_context_t. Presently include/asm-generic/mmu.h is aimed at nommu,
so it would probably be worthwhile stubbing in the FDPIC loadmap entries
there to make things easier for future ports.
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