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Date: Thu, 9 Jun 2011 17:08:04 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: Hugh Dickins <hughd@google.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>, Ingo Molnar <mingo@elte.hu>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Thomas Gleixner <tglx@linutronix.de>, linux-kernel@vger.kernel.org,
        efault@gmx.de, Arne Jansen <lists@die-jansens.de>
Subject: Re: [PATCH 1/3] printk: Release console_sem after logbuf_lock
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On Thu, 9 Jun 2011 16:57:29 -0700 (PDT)
Hugh Dickins <hughd@google.com> wrote:

> Does your mail below stir any useful memories?

Thanks.  I did have the email, but it didn't match any of my grep
patterns.

> Some notes:

Stupid thing doesn't explain the magical locking though :( I'm 99.9%
sure that putting an up() inside a spinlock_irq()ed region was
deliberate.

> - Being heartily sick of reverse-engineering interface information
>   from implementations, I have gratuitously added comments in several
>   random parts of the kernel.  Shoot me.

hah.