linux-kernel - Re: [PATCH 2/2] enhance sysfs rfkill interface

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Message-ID: <12058.1268437699@localhost>
Date:	Fri, 12 Mar 2010 18:48:19 -0500
From:	Valdis.Kletnieks@...edu
To:	Florian Mickler <florian@...kler.org>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	"John W. Linville" <linville@...driver.com>,
	Marcel Holtmann <marcel@...tmann.org>,
	Henrique de Moraes Holschuh <hmh@....eng.br>,
	Johannes Berg <johannes@...solutions.net>,
	linux-wireless@...r.kernel.org,
	Randy Dunlap <rdunlap@...otime.net>,
	Alan Jenkins <alan-jenkins@...fmail.co.uk>,
	linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org
Subject: Re: [PATCH 2/2] enhance sysfs rfkill interface

On Fri, 12 Mar 2010 23:39:25 +0100, Florian Mickler said:
> On Fri, 12 Mar 2010 13:20:26 -0800
> Dmitry Torokhov <dmitry.torokhov@...il.com> wrote:

> > You are not updating but reading... Are you concerned about seeing
> > a partial write to u32? It does not happen.
> > 
> Hm.. You shure? On every arch that supports wireless drivers? 

If a u32 load or store from memory isn't atomic, the Linux kernel is screwed
anyhow.  Hint - imagine if every 32-bit reference had to be treated the way
we currently treat 64-bit references on a 32-bit system.

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