linux-kernel - [PATCH 0/2] blackfin: ptrace mm/sram

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Message-ID: <20100527195544.GA25935@redhat.com>
Date:	Thu, 27 May 2010 21:55:44 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Mike Frysinger <vapier.adi@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	David Howells <dhowells@...hat.com>,
	Roland McGrath <roland@...hat.com>, linux-sh@...r.kernel.org,
	Paul Mundt <lethal@...ux-sh.org>,
	uclinux-dist-devel@...ckfin.uclinux.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 0/2] blackfin: ptrace mm/sram_list fixes

On 05/26, Oleg Nesterov wrote:
>
> On 05/25, Mike Frysinger wrote:
> >
> > we probably should add proper locking to this
> > structure though.
>
> Agreed. I'll try to make the trivial patch tomorrow. I think we
> can just use mm->mmap_sem, is_user_addr_valid() needs this lock
> for find_vma() anyway.

please see the patches.

UNTESTED! the second one certainly needs the review from someone
who knows what this code does ;)

BTW. Obviously sys_sram_alloc() can create multiple sram_list_struct
nodes with the same ->addr (with or without this patch), I hope this
is fine.

Oleg.

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