From: Will Deacon <will.deacon@arm.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: mingo@kernel.org, linux-kernel@vger.kernel.org,
longman@redhat.com, andrea.parri@amarulasolutions.com,
tglx@linutronix.de
Subject: Re: [RFC][PATCH 1/3] locking/qspinlock: Re-order code
Date: Mon, 1 Oct 2018 18:17:04 +0100 [thread overview]
Message-ID: <20181001171703.GD13918@arm.com> (raw)
In-Reply-To: <20180926111307.401531130@infradead.org>
On Wed, Sep 26, 2018 at 01:01:18PM +0200, Peter Zijlstra wrote:
> Flip the branch condition after atomic_fetch_or_acquire(_Q_PENDING_VAL)
> such that we loose the indent. This also result in a more natural code
> flow IMO.
>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
> ---
> kernel/locking/qspinlock.c | 56 +++++++++++++++++++++------------------------
> 1 file changed, 27 insertions(+), 29 deletions(-)
I think I actually prefer the current code flow, but that's probably just
because I'm used to it and I don't have a strong opinion about this, so:
Acked-by: Will Deacon <will.deacon@arm.com>
given that this looks correct to me.
Will
next prev parent reply other threads:[~2018-10-01 17:16 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-26 11:01 [RFC][PATCH 0/3] locking/qspinlock: Improve determinism for x86 Peter Zijlstra
2018-09-26 11:01 ` [RFC][PATCH 1/3] locking/qspinlock: Re-order code Peter Zijlstra
2018-10-01 17:17 ` Will Deacon [this message]
2018-09-26 11:01 ` [RFC][PATCH 2/3] locking/qspinlock: Rework some comments Peter Zijlstra
2018-10-01 17:17 ` Will Deacon
2018-10-01 19:10 ` Peter Zijlstra
2018-10-02 13:20 ` Will Deacon
2018-10-02 13:43 ` Peter Zijlstra
2018-09-26 11:01 ` [RFC][PATCH 3/3] locking/qspinlock: Optimize for x86 Peter Zijlstra
2018-09-26 16:30 ` Waiman Long
2018-09-26 17:54 ` Peter Zijlstra
2018-09-27 7:29 ` Peter Zijlstra
2018-09-26 20:52 ` Andrea Parri
2018-09-27 7:17 ` Peter Zijlstra
2018-09-27 7:47 ` Andrea Parri
2018-09-27 7:59 ` Peter Zijlstra
2018-09-27 8:13 ` Andrea Parri
2018-09-27 8:57 ` Peter Zijlstra
2018-09-27 12:16 ` David Laight
2018-10-01 17:17 ` Will Deacon
2018-10-01 20:00 ` Peter Zijlstra
2018-10-02 13:19 ` Will Deacon
2018-10-02 14:14 ` Peter Zijlstra
2018-10-02 12:31 ` Andrea Parri
2018-10-02 13:22 ` Will Deacon
2018-10-02 13:44 ` Andrea Parri
2018-09-26 15:01 ` [RFC][PATCH 0/3] locking/qspinlock: Improve determinism " Sebastian Andrzej Siewior
2018-09-26 15:08 ` Thomas Gleixner
2018-09-26 15:38 ` Sebastian Andrzej Siewior
2018-09-26 16:20 ` Waiman Long
2018-09-26 17:51 ` Peter Zijlstra
2018-09-26 23:21 ` Waiman Long
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