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From: Mike Frysinger <vapier.adi@gmail.com>
Date: Wed, 27 Jul 2011 17:12:32 -0700
Message-ID: <CAMjpGUdXfzt5HuDgspf6Bijm3xOPcck_JR38-AV2FSK0t99MTQ@mail.gmail.com>
Subject: Re: [RFC/PATCH] mm/futex: Fix futex writes on archs with SW tracking
 of dirty & young
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Peter Zijlstra <peterz@infradead.org>, David Howells <dhowells@redhat.com>,
        Shan Hai <haishan.bai@gmail.com>, paulus@samba.org, tglx@linutronix.de,
        walken@google.com, cmetcalf@tilera.com, tony.luck@intel.com,
        akpm@linux-foundation.org, linuxppc-dev@lists.ozlabs.org,
        linux-kernel@vger.kernel.org, uclinux-dist-devel@blackfin.uclinux.org
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On Wed, Jul 27, 2011 at 03:20, Benjamin Herrenschmidt wrote:
> Hoping the BUG() isn't trippable by userspace but then it's no mmu, it's
> not like we care what userspace can do right :-)

side note ... common misconception that "no mmu" == "no memory
protection".  a few of the nommu processors have memory protection,
just no virtual<->physical translation.

thanks for the patch !
-mike