Message-ID: <1384369941.28250.0.camel@jlt4.sipsolutions.net> (sfid-20131113_201234_320322_DB361441)
Subject: Re: [RFC 0/5] cfg80211: regulatory quiescing and exporting DFS
 regions
From: Johannes Berg <johannes@sipsolutions.net>
To: "Luis R. Rodriguez" <mcgrof@do-not-panic.com>
Cc: Janusz Dziedzic <janusz.dziedzic@tieto.com>,
	Jouni Malinen <j@w1.fi>, sunitb <sunitb@qca.qualcomm.com>,
	rsunki <rsunki@qca.qualcomm.com>,
	linux-wireless <linux-wireless@vger.kernel.org>
Date: Wed, 13 Nov 2013 20:12:21 +0100
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On Wed, 2013-11-13 at 19:57 +0100, Luis R. Rodriguez wrote:
> On Wed, Nov 13, 2013 at 7:48 PM, Johannes Berg
> <johannes@sipsolutions.net> wrote:
> > On Wed, 2013-11-13 at 19:12 +0100, Luis R. Rodriguez wrote:
> >
> >> Janusz, please test, and likely feel free to take on the last patch.
> >> We may need help from Johannes on the rtnl lock question now required
> >> for checks on enabling beacon operation.
> >
> > What's that rtnl thing about?
> 
> Whether or not callers of cfg80211_reg_can_beacon() have it properly
> held already and if not best strategy to make this simple and concise.
> The rtnl is required as we need to now query the cfg80211 regdom dfs
> region for the case where a channel requires DFS.

Can't you just use RCU for that part?

johannes