Re: [PATCH v4 3/3] qspinlock, x86: Add x86 specific optimization for 2 contending tasks

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To: Waiman Long <Waiman.Long@xxxxxx>
Subject: Re: [PATCH v4 3/3] qspinlock, x86: Add x86 specific optimization for 2 contending tasks
From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Date: Fri, 21 Feb 2014 13:12:22 +0100
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Arnd Bergmann <arnd@xxxxxxxx>, linux-arch@xxxxxxxxxxxxxxx, x86@xxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Steven Rostedt <rostedt@xxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Michel Lespinasse <walken@xxxxxxxxxx>, Andi Kleen <andi@xxxxxxxxxxxxxx>, Rik van Riel <riel@xxxxxxxxxx>, "Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, Raghavendra K T <raghavendra.kt@xxxxxxxxxxxxxxxxxx>, George Spelvin <linux@xxxxxxxxxxx>, Tim Chen <tim.c.chen@xxxxxxxxxxxxxxx>, Daniel J Blueman <daniel@xxxxxxxxxxxxx>, Alexander Fyodorov <halcy@xxxxxxxxx>, Aswin Chandramouleeswaran <aswin@xxxxxx>, Scott J Norton <scott.norton@xxxxxx>, Thavatchai Makphaibulchoke <thavatchai.makpahibulchoke@xxxxxx>
In-reply-to: <1392669684-4807-4-git-send-email-Waiman.Long@hp.com>
List-id: <linux-arch.vger.kernel.org>
User-agent: Mutt/1.5.21 (2012-12-30)


Why is this x86 only code?
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- [PATCH v4 0/3] qspinlock: Introducing a 4-byte queue spinlock
  - From: Waiman Long
- [PATCH v4 3/3] qspinlock, x86: Add x86 specific optimization for 2 contending tasks
  - From: Waiman Long

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