linux-kernel - Re: [PATCH] memcg remove warning at DEBUG

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

Message-ID: <20090408052715.GX7082@balbir.in.ibm.com>
Date:	Wed, 8 Apr 2009 10:57:15 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"nishimura@....nes.nec.co.jp" <nishimura@....nes.nec.co.jp>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>
Subject: Re: [PATCH] memcg remove warning at DEBUG_VM=off

* KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> [2009-04-08 14:20:42]:

> From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> This is against 2.6.30-rc1. (maybe no problem against mmotm.)
> 
> ==
> Fix warning as
> 
>   CC      mm/memcontrol.o
> mm/memcontrol.c:318: warning: ?$B!Fmem_cgroup_is_obsolete?$B!G defined but not used
> 
> This is called only from VM_BUG_ON().
> 
> Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> ---
> Index: linux-2.6.30-rc1/mm/memcontrol.c
> ===================================================================
> --- linux-2.6.30-rc1.orig/mm/memcontrol.c
> +++ linux-2.6.30-rc1/mm/memcontrol.c
> @@ -314,13 +314,14 @@ static struct mem_cgroup *try_get_mem_cg
>  	return mem;
>  }
> 
> +#ifdef CONFIG_DEBUG_VM
>  static bool mem_cgroup_is_obsolete(struct mem_cgroup *mem)
>  {
>  	if (!mem)
>  		return true;
>  	return css_is_removed(&mem->css);
>  }
> -
> +#endif

Can we change the code to use

        VM_BUG_ON(!mem || css_is_removed(&mem->css));

Reviewed-by: Balbir Singh <balbir@...ux.vnet.ibm.com>
 

-- 
	Balbir
--
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/