linux-kernel - Re: mmotm 2010-02-03-20-09 uploaded (mmap.c)

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Date:	Thu, 04 Feb 2010 12:03:01 -0800
From:	Randy Dunlap <rdunlap@...otime.net>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	linux-kernel@...r.kernel.org,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	David Rientjes <rientjes@...gle.com>
Subject: Re: mmotm 2010-02-03-20-09 uploaded (mmap.c)

On 02/04/10 10:58, Andrew Morton wrote:
> On Thu, 04 Feb 2010 10:14:55 -0800
> Randy Dunlap<rdunlap@...otime.net>  wrote:
>
>> On 02/03/10 20:09, akpm@...ux-foundation.org wrote:
>>> The mm-of-the-moment snapshot 2010-02-03-20-09 has been uploaded to
>>>
>>>      http://userweb.kernel.org/~akpm/mmotm/
>>>
>>> and will soon be available at
>>>
>>>      git://zen-kernel.org/kernel/mmotm.git
>>>
>>> It contains the following patches against 2.6.33-rc6:
>>
>>
>> In some config cases, this patch seems to have a problem:
>>     sysctl-clean-up-vm-related-variable-declarations.patch
>>
>> In mm/mmap.c:
>> +#ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
>> +/* Used by each architecture's private code and sysctl. */
>> +int sysctl_legacy_va_layout;
>> +#endif
>>
>> mm/mmap.c:92: error: expected identifier or '(' before numeric constant
>>
>> I guess that sometimes sysctl_legacy_va_layout is a #define:
>> from include/linux/mm.h:
>>
>> #ifdef CONFIG_SYSCTL
>> extern int sysctl_legacy_va_layout;
>> #else
>> #define sysctl_legacy_va_layout 0
>> #endif
>>
>> and indeed the failing builds do not have CONFIG_SYSCTL enabled.
>
> Thanks.  This, I guess:
>
> --- a/mm/mmap.c~sysctl-clean-up-vm-related-variable-declarations-fix
> +++ a/mm/mmap.c
> @@ -87,7 +87,7 @@ int sysctl_overcommit_ratio = 50;	/* def
>   int sysctl_max_map_count __read_mostly = DEFAULT_MAX_MAP_COUNT;
>   struct percpu_counter vm_committed_as;
>
> -#ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
> +#if defined(HAVE_ARCH_PICK_MMAP_LAYOUT)&&  defined(CONFIG_SYSCTL)
>   /* Used by each architecture's private code and sysctl. */
>   int sysctl_legacy_va_layout;
>   #endif
> _
>

Yep, that works.  Thanks.

Acked-by: Randy Dunlap <rdunlap@...otime.net>


-- 
~Randy
--
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