linux-kernel - Re: [PATCH v4 2/7] locking/pvqspinlock: Add pending bit support

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Date:	Mon, 03 Aug 2015 11:37:06 -0700
From:	Davidlohr Bueso <dave@...olabs.net>
To:	Waiman Long <Waiman.Long@...com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	linux-kernel@...r.kernel.org, Scott J Norton <scott.norton@...com>,
	Douglas Hatch <doug.hatch@...com>
Subject: Re: [PATCH v4 2/7] locking/pvqspinlock: Add pending bit support

On Fri, 2015-07-31 at 22:21 -0400, Waiman Long wrote:
>  /*
> + * Try to acquire the lock and wait using the pending bit
> + */
> +static int pv_pending_lock(struct qspinlock *lock, u32 val)

Sorry but, why did yo not rewrite the function as we had previously
discussed. This is very confusing to read, the one I suggested follows a
much nicer flow and purposely illustrates the intention. You also failed
to address my loop semantics concerns altogether.

Thanks,
Davidlohr

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