linux-kernel - Re: [PATCH 6/6] futex: cleanup fault logic

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Message-Id: <1236852922.5090.121.camel@laptop>
Date:	Thu, 12 Mar 2009 11:15:22 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Darren Hart <dvhltc@...ibm.com>
Cc:	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>,
	Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: [PATCH 6/6] futex: cleanup fault logic

On Thu, 2009-03-12 at 00:56 -0700, Darren Hart wrote:
> Older versions of the futex code held the mmap_sem which had to be
> dropped in order to call get_user(), so a two-pronged fault handling
> mechanism was employed to handle faults of the atomic operations.  The
> mmap_sem is no longer held, so get_user() should be adequate.  This patch
> greatly simplifies the logic and improves legibility.

Thanks!

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