linux-kernel - Re: [PATCH v2] CAPI: Silence lockdep warning on get_capi_appl_by

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Message-Id: <20101021.042959.91336397.davem@davemloft.net>
Date:	Thu, 21 Oct 2010 04:29:59 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jan.kiszka@....de
Cc:	linux-kernel@...r.kernel.org, i4ldeveloper@...tserv.isdn4linux.de,
	netdev@...r.kernel.org, isdn@...ux-pingi.de, peterz@...radead.org
Subject: Re: [PATCH v2] CAPI: Silence lockdep warning on
 get_capi_appl_by_nr usage

From: Jan Kiszka <jan.kiszka@....de>
Date: Sun, 17 Oct 2010 17:18:15 +0200

> As long as we hold capi_controller_lock, we can safely access
> capi_applications without RCU protection as no one can modify the
> application list underneath us. Introduce an RCU-free
> __get_capi_appl_by_nr for this purpose. This silences lockdep warnings
> on suspicious rcu_dereference usage.
> 
> Signed-off-by: Jan Kiszka <jan.kiszka@....de>

Applied.
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