linux-kernel - Re: [RESEND] [PATCH] memcg: Fix build warning and avoid checking for mem != null again and again

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-Id: <20090528174943.d4447480.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Thu, 28 May 2009 17:49:43 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Nikanth Karthikesan <knikanth@...e.de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	balbir@...ux.vnet.ibm.com, Pavel Emelyanov <xemul@...nvz.org>,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Pekka Enberg <penberg@...helsinki.fi>
Subject: Re: [RESEND] [PATCH] memcg: Fix build warning and avoid checking
 for mem != null again and again

On Thu, 28 May 2009 14:20:43 +0530
Nikanth Karthikesan <knikanth@...e.de> wrote:

> 
> Resending the patch to Andrew for inclusion in -mm tree.
> 
> Thanks
> Nikanth
> 
> Fix build warning, "mem_cgroup_is_obsolete defined but not used" when
> CONFIG_DEBUG_VM is not set. Also avoid checking for !mem again and again.
> 
> Signed-off-by: Nikanth Karthikesan <knikanth@...e.de>
> Acked-by: Pekka Enberg <penberg@...helsinki.fi>
> 
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>


> ---
> 
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index 01c2d8f..d253846 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -314,14 +314,6 @@ static struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm)
>  	return mem;
>  }
>  
> -static bool mem_cgroup_is_obsolete(struct mem_cgroup *mem)
> -{
> -	if (!mem)
> -		return true;
> -	return css_is_removed(&mem->css);
> -}
> -
> -
>  /*
>   * Call callback function against all cgroup under hierarchy tree.
>   */
> @@ -932,7 +924,7 @@ static int __mem_cgroup_try_charge(struct mm_struct *mm,
>  	if (unlikely(!mem))
>  		return 0;
>  
> -	VM_BUG_ON(!mem || mem_cgroup_is_obsolete(mem));
> +	VM_BUG_ON(css_is_removed(&mem->css));
>  
>  	while (1) {
>  		int ret;
> 
> 
> --
> To unsubscribe, send a message with 'unsubscribe linux-mm' in
> the body to majordomo@...ck.org.  For more info on Linux MM,
> see: http://www.linux-mm.org/ .
> Don't email: <a href=mailto:"dont@...ck.org"> email@...ck.org </a>
> 

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/