linux-kernel - Re: [PATCH tip/core/rcu 04/13] wireless: Apply rcu_access

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Message-ID: <1380131303.2222.9.camel@bwh-desktop.uk.level5networks.com>
Date:	Wed, 25 Sep 2013 18:48:23 +0100
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
CC:	<linux-kernel@...r.kernel.org>, <mingo@...nel.org>,
	<laijs@...fujitsu.com>, <dipankar@...ibm.com>,
	<akpm@...ux-foundation.org>, <mathieu.desnoyers@...icios.com>,
	<josh@...htriplett.org>, <niv@...ibm.com>, <tglx@...utronix.de>,
	<peterz@...radead.org>, <rostedt@...dmis.org>,
	<dhowells@...hat.com>, <edumazet@...gle.com>, <darren@...art.com>,
	<fweisbec@...il.com>, <sbw@....edu>,
	Stephen Hemminger <stephen@...workplumber.org>,
	"David S. Miller" <davem@...emloft.net>,
	<bridge@...ts.linux-foundation.org>, <netdev@...r.kernel.org>
Subject: Re: [PATCH tip/core/rcu 04/13] wireless: Apply rcu_access_pointer()
 to avoid sparse false positive

On Tue, 2013-09-24 at 18:35 -0700, Paul E. McKenney wrote:
> From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
> 
> The sparse checking for rcu_assign_pointer() was recently upgraded
> to reject non-__kernel address spaces.  This also rejects __rcu,
> which is almost always the right thing to do.  However, the uses in
> cfg80211_combine_bsses() and cfg80211_bss_update() are legitimate:
> They is assigning a pointer to an element from an RCU-protected list,
[...]

'They is'?  This error is also in the commit messsages for the bridge
and mac80211 patches, and maybe others that weren't sent to netdev.

Ben.

-- 
Ben Hutchings, Staff Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

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