linux-kernel - Re: [PATCH v2 1/3] hrtimer: add hrtimer_init

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Date:	Wed, 12 Sep 2012 16:49:11 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	"mingo@...e.hu" <mingo@...e.hu>,
	"ak@...ux.intel.com" <ak@...ux.intel.com>,
	"Yan, Zheng" <zheng.z.yan@...el.com>,
	Robert Richter <robert.richter@....com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Eric Dumazet <eric.dumazet@...il.com>
Subject: Re: [PATCH v2 1/3] hrtimer: add hrtimer_init_cpu()

On Wed, 2012-09-12 at 16:46 +0200, Stephane Eranian wrote:

> I am fine with dropping this patch. I just found it odd there was a per-cpu
> data reference embedded deep into the call. I wanted things to be more
> explicit. I know it works without the proposed change.

Ah the reason its there is to make sure the base pointer is a valid base
pointer, this avoids an extra conditional in a number of places. Note
that it uses raw_get_cpu_var(), so it doesn't even actually know which
specific pointer goes in.


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