linux-kernel - Re: [PATCH 3.10 282/319] ipc/sem.c: fix complex

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Message-ID: <20170206080456.GA14903@1wt.eu>
Date:   Mon, 6 Feb 2017 09:04:56 +0100
From:   Willy Tarreau <w@....eu>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        linux@...ck-us.net
Cc:     Manfred Spraul <manfred@...orfullife.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Davidlohr Bueso <dave@...olabs.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...e.hu>, 1vier1@....de,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Jiri Slaby <jslaby@...e.cz>
Subject: Re: [PATCH 3.10 282/319] ipc/sem.c: fix complex_count vs. simple op
 race

On Sun, Feb 05, 2017 at 08:21:44PM +0100, Willy Tarreau wrote:
> From: Manfred Spraul <manfred@...orfullife.com>
> 
> commit 5864a2fd3088db73d47942370d0f7210a807b9bc upstream.
> 
> Commit 6d07b68ce16a ("ipc/sem.c: optimize sem_lock()") introduced a
> race:

Finally dropped in favor of a revert of the patch above as it broke
the build on some architectures.

Willy