linux-kernel - Re: [PATCH] use rwlock runtime init for drivers/isdn/mISDN/tei.c

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Message-ID: <20081211095653.GB25500@pingi.kke.suse.de>
Date:	Thu, 11 Dec 2008 10:56:53 +0100
From:	Karsten Keil <kkeil@...e.de>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Karsten Keil <kkeil@...ell.com>, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] use rwlock runtime init for drivers/isdn/mISDN/tei.c

On Wed, Dec 10, 2008 at 02:40:32PM -0500, Steven Rostedt wrote:
> 
Thanks for bring up this again, I already sent this patch
several times some months ago:


>From 65b212b2e8dc37904e3b88882fa15cf9eceb3510 Mon Sep 17 00:00:00 2001
From: Karsten Keil <kkeil@...e.de>
Date: Wed, 6 Aug 2008 15:14:58 +0200
Subject: [PATCH] Fix lockdep warning

use correct dynamic spinlock init function.

Signed-off-by: Karsten Keil <kkeil@...e.de>
---
 drivers/isdn/mISDN/tei.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/isdn/mISDN/tei.c b/drivers/isdn/mISDN/tei.c
index 6fbae42..d8af45c 100644
--- a/drivers/isdn/mISDN/tei.c
+++ b/drivers/isdn/mISDN/tei.c
@@ -1287,7 +1287,7 @@ create_teimanager(struct mISDNdevice *dev)
 	if (!mgr)
 		return -ENOMEM;
 	INIT_LIST_HEAD(&mgr->layer2);
-	mgr->lock = __RW_LOCK_UNLOCKED(mgr->lock);
+	rwlock_init(&mgr->lock);
 	skb_queue_head_init(&mgr->sendq);
 	mgr->nextid = 1;
 	mgr->lastid = MISDN_ID_NONE;
-- 
1.5.6.4



> The following patch is in:
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace.git
> 
>     branch: cleanups
> 
> 
> Steven Rostedt (1):
>       use rwlock runtime init for drivers/isdn/mISDN/tei.c
> 
> ----
>  drivers/isdn/mISDN/tei.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> ---------------------------
> commit 30bb0d7d6956526eedb5ad30b9d6ff085801d788
> Author: Steven Rostedt <srostedt@...hat.com>
> Date:   Wed Dec 10 14:25:23 2008 -0500
> 
>     use rwlock runtime init for drivers/isdn/mISDN/tei.c
>     
>     Impact: clean up
>     
>     __RW_LOCK_UNLOCKED(lock) is meant for compile time initializations.
>     rwlock_init(&lock) is used for run time initialization.
>     
>     This patch converts drivers/isdn/mISDN/tei.c to initialize the
>     mrg->lock rwlock.
>     
>     Signed-off-by: Steven Rostedt <srostedt@...hat.com>
> 
> diff --git a/drivers/isdn/mISDN/tei.c b/drivers/isdn/mISDN/tei.c
> index 6fbae42..d8af45c 100644
> --- a/drivers/isdn/mISDN/tei.c
> +++ b/drivers/isdn/mISDN/tei.c
> @@ -1287,7 +1287,7 @@ create_teimanager(struct mISDNdevice *dev)
>  	if (!mgr)
>  		return -ENOMEM;
>  	INIT_LIST_HEAD(&mgr->layer2);
> -	mgr->lock = __RW_LOCK_UNLOCKED(mgr->lock);
> +	rwlock_init(&mgr->lock);
>  	skb_queue_head_init(&mgr->sendq);
>  	mgr->nextid = 1;
>  	mgr->lastid = MISDN_ID_NONE;

-- 
Karsten Keil
SuSE Labs
ISDN and VOIP development
SUSE LINUX Products GmbH, Maxfeldstr.5 90409 Nuernberg, GF: Markus Rex, HRB 16746 (AG Nuernberg)
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