linux-kernel - Re: [PATCH 2/2] memcg: mark rcu protected member as _

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Message-ID: <20120104090102.GB12581@tiehlicka.suse.cz>
Date:	Wed, 4 Jan 2012 10:01:03 +0100
From:	Michal Hocko <mhocko@...e.cz>
To:	kosaki.motohiro@...il.com
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Johannes Weiner <hannes@...xchg.org>, cgroups@...r.kernel.org
Subject: Re: [PATCH 2/2] memcg: mark rcu protected member as __rcu

On Tue 03-01-12 18:33:52, kosaki.motohiro@...il.com wrote:
> From: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
> 
> Currently "make C=2 mm/memcontrol.o" makes following warnings. fix it.
> 
> mm/memcontrol.c:4243:21: error: incompatible types in comparison expression (different address spaces)
> mm/memcontrol.c:4245:21: error: incompatible types in comparison expression (different address spaces)
> 
> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> Cc: Johannes Weiner <hannes@...xchg.org>
> Cc: Michal Hocko <mhocko@...e.cz>
> Cc: cgroups@...r.kernel.org

Looks correct.

Acked-by: Michal Hocko <mhocko@...e.cz>

Thanks

> ---
>  mm/memcontrol.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index 6adeeec..138be2b 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -195,7 +195,7 @@ struct mem_cgroup_threshold_ary {
>  
>  struct mem_cgroup_thresholds {
>  	/* Primary thresholds array */
> -	struct mem_cgroup_threshold_ary *primary;
> +	struct mem_cgroup_threshold_ary __rcu *primary;
>  	/*
>  	 * Spare threshold array.
>  	 * This is needed to make mem_cgroup_unregister_event() "never fail".
> -- 
> 1.7.1
> 
> --
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-- 
Michal Hocko
SUSE Labs
SUSE LINUX s.r.o.
Lihovarska 1060/12
190 00 Praha 9    
Czech Republic
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