linux-kernel - Re: [PATCH V2 2/2] mm: Add sysfs interface to dump each node's zonelist information

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Date:   Tue, 06 Sep 2016 12:19:05 +0530
From:   Anshuman Khandual <khandual@...ux.vnet.ibm.com>
To:     kbuild test robot <lkp@...el.com>,
        Anshuman Khandual <khandual@...ux.vnet.ibm.com>
CC:     kbuild-all@...org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, akpm@...ux-foundation.org
Subject: Re: [PATCH V2 2/2] mm: Add sysfs interface to dump each node's zonelist
 information

On 09/06/2016 11:41 AM, kbuild test robot wrote:
> Hi Anshuman,
> 
> [auto build test ERROR on mmotm/master]
> [also build test ERROR on v4.8-rc5 next-20160905]
> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
> [Suggest to use git(>=2.9.0) format-patch --base=<commit> (or --base=auto for convenience) to record what (public, well-known) commit your patch series was built on]
> [Check https://git-scm.com/docs/git-format-patch for more information]
> 
> url:    https://github.com/0day-ci/linux/commits/Anshuman-Khandual/mm-Export-definition-of-zone_names-array-through-mmzone-h/20160906-133749
> base:   git://git.cmpxchg.org/linux-mmotm.git master
> config: x86_64-randconfig-x013-201636 (attached as .config)
> compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705
> reproduce:
>         # save the attached .config to linux build tree
>         make ARCH=x86_64 
> 
> All errors (new ones prefixed by >>):
> 
>    drivers/base/memory.c: In function 'dump_zonelists':
>>> >> drivers/base/memory.c:474:20: error: 'ZONELIST_NOFALLBACK' undeclared (first use in this function)
>         node_zonelists[ZONELIST_NOFALLBACK]);
>                        ^~~~~~~~~~~~~~~~~~~
>    drivers/base/memory.c:474:20: note: each undeclared identifier is reported only once for each function it appears in
> 
> vim +/ZONELIST_NOFALLBACK +474 drivers/base/memory.c
> 
>    468					node_zonelists[ZONELIST_FALLBACK]);
>    469			count += sprintf(buf + count, "[NODE (%d)]\n", node);
>    470			count += sprintf(buf + count, "\tZONELIST_FALLBACK\n");
>    471			count += dump_zonelist(buf + count, zonelist);
>    472	
>    473			zonelist = &(NODE_DATA(node)->
>  > 474					node_zonelists[ZONELIST_NOFALLBACK]);
>    475			count += sprintf(buf + count, "\tZONELIST_NOFALLBACK\n");

Missed the fact that ZONELIST_NOFALLBACK is valid only on CONFIG_NUMA
systems. Will fix and resend the patch.