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

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Date:	Wed, 14 Jan 2009 10:43:24 +0600
From:	"Rakib Mullick" <rakib.mullick@...il.com>
To:	"KAMEZAWA Hiroyuki" <kamezawa.hiroyu@...fujitsu.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

Sure. You can carryout your other jobs. Here is the patch.
Thanks for your help guys.

--- 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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