linux-kernel - Re: [PATCH] mm: Fix section mismatch in memcontrol.c

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Date:	Wed, 14 Jan 2009 14:00:10 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	"Rakib Mullick" <rakib.mullick@...il.com>
Cc:	"Li Zefan" <lizf@...fujitsu.com>,
	"Linux-kernel Mailing List" <linux-kernel@...r.kernel.org>,
	mingo@...e.hu, "Andrew Morton" <akpm@...ux-foundation.org>,
	"Balbir Singh" <balbir@...ux.vnet.ibm.com>
Subject: Re: [PATCH] mm: Fix section mismatch in memcontrol.c

On Wed, 14 Jan 2009 10:43:24 +0600
"Rakib Mullick" <rakib.mullick@...il.com> wrote:

> Sure. You can carryout your other jobs. Here is the patch.
> Thanks for your help guys.
> 
Thank you. I confirmed this fixes mismatch.

Could you send this with your Signed-off-by, again ?

you got my Ack.
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>



> --- linux-2.6-orig/mm/memcontrol.c	2009-01-12 09:53:10.000000000 +0600
> +++ linux-2.6/mm/memcontrol.c	2009-01-13 19:55:02.846459224 +0600
> @@ -2170,13 +2170,13 @@ static void mem_cgroup_put(struct mem_cg
> 
> 
>  #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
> -static void __init enable_swap_cgroup(void)
> +static void __init_refok enable_swap_cgroup(void)
>  {
>  	if (!mem_cgroup_disabled() && really_do_swap_account)
>  		do_swap_account = 1;
>  }
>  #else
> -static void __init enable_swap_cgroup(void)
> +static void __init_refok enable_swap_cgroup(void)
>  {
>  }
>  #endif
> 
> 
> On 1/13/09, KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> wrote:
> > On Tue, 13 Jan 2009 13:49:03 +0800
> > Li Zefan <lizf@...fujitsu.com> wrote:
> >
> >> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> >> Cc: Balbir Singh <balbir@...ux.vnet.ibm.com>
> >>
> >> Rakib Mullick wrote:
> >> > Impact: Fix section mismatch warning.
> >> >
> >> > The annotation for __init in enable_swap_cgroup() and __initdata for
> >> > really_do_swap_account produces the following warning. Which is not
> >> > right, since this function is called from non-init section. This patch
> >> > fixes it. If anything else please notice.
> >> >
> >>
> >> I saw this warning on IA64. But this fix is wrong IMO.
> >>
> >> enable_swap_cgroup() will be called at system boot only:
> >>
> >> start_kernel()
> >>   cgroup_init()
> >>     mem_cgroup_create()
> >>       enable_swap_cgroup()
> >>
> >> I think the proper fix is annotate mem_cgroup_create() with __init_refok.
> >>
> > I think Li Zefan's fix is correct.
> > Could you make a patch ? or I'll schedule this as my work.
> >
> > Thanks,
> > -Kame
> >
> >
> >
> 

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