linux-kernel - Re: [PATCH 08/24] OProfile: Moving increment_tail() in buffer

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Message-ID: <20080726095612.GD25890@elte.hu>
Date:	Sat, 26 Jul 2008 11:56:12 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Robert Richter <robert.richter@....com>
Cc:	Barry Kasindorf <barry.kasindorf@....com>,
	Thomas Gleixner <tglx@...utronix.de>,
	oprofile-list <oprofile-list@...ts.sourceforge.net>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 08/24] OProfile: Moving increment_tail() in
	buffer_sync.c


* Robert Richter <robert.richter@....com> wrote:

> +static void increment_tail(struct oprofile_cpu_buffer *b)
> +{
> +	unsigned long new_tail = b->tail_pos + 1;
> +
> +	rmb();

this barrier needs a comment.

	Ingo
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