linux-kernel - Re: [PATCH] arch: sparc: kernel: smp

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Message-Id: <20140601.185245.1776835653575236303.davem@davemloft.net>
Date:	Sun, 01 Jun 2014 18:52:45 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	rickard_strandqvist@...ctrumdigital.se
Cc:	tkhai@...dex.ru, paul.gortmaker@...driver.com,
	peterz@...radead.org, bhelgaas@...gle.com,
	sparclinux@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arch: sparc: kernel: smp_64.c: Optimization of the Code

From: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
Date: Sun,  1 Jun 2014 23:48:18 +0200

> From what I know, AND is faster then modulo.
> Not sure if this is worth changing though.
> 
> Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>

This code came from the IA-64 arch code, so you probably want to
fix either both or neither.

I'd say neither, this is not a performance critical path and the
intent is clearer when expressed as a modulus.
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