netdev - Re: [PATCH 1/2] fix lockdep warning

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Date:	Wed, 5 Oct 2011 01:51:31 +0300 (EEST)
From:	Julian Anastasov <ja@....bg>
To:	Hans Schillstrom <hans.schillstrom@...csson.com>
cc:	horms@...ge.net.au, wensong@...ux-vs.org,
	lvs-devel@...r.kernel.org, netdev@...r.kernel.org,
	netfilter-devel@...r.kernel.org, hans@...illstrom.com
Subject: Re: [PATCH 1/2] fix lockdep warning


	Hello,

On Mon, 3 Oct 2011, Hans Schillstrom wrote:

> From: Hans Schillstrom <hans@...illstrom.com>
> 
> rs_lock needs a key to make lock dep happy.
> 
> Signed-off-by: Hans Schillstrom <hans.schillstrom@...csson.com>
> 
> diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
> index 2b771dc..a1af72f 100644
> --- a/net/netfilter/ipvs/ip_vs_ctl.c
> +++ b/net/netfilter/ipvs/ip_vs_ctl.c
> @@ -57,6 +57,7 @@ static DEFINE_MUTEX(__ip_vs_mutex);
>  
>  /* lock for service table */
>  static DEFINE_RWLOCK(__ip_vs_svc_lock);
> +static struct lock_class_key ip_vs_rs_key;

	ip_vs_rs_key remains unused without debugging. I don't
remember the reason why IPVS is the only place that calls
__rwlock_init instead of rwlock_init. Can we use rwlock_init?

>  /* sysctl variables */
>  
> @@ -3680,6 +3681,7 @@ int __net_init ip_vs_control_net_init(struct net *net)
>  	struct netns_ipvs *ipvs = net_ipvs(net);
>  
>  	ipvs->rs_lock = __RW_LOCK_UNLOCKED(ipvs->rs_lock);
> +	__rwlock_init(&ipvs->rs_lock, "ipvs->rs_lock", &ip_vs_rs_key);
>  
>  	/* Initialize rs_table */
>  	for (idx = 0; idx < IP_VS_RTAB_SIZE; idx++)
> -- 
> 1.7.4.4

Regards

--
Julian Anastasov <ja@....bg>
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