linux-kernel - Re: [PATCH 2/2] x86, pti: fix boot warning from Global-bit setting

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Message-ID: <201804181902.l8Oa8c8g%fengguang.wu@intel.com>
Date:   Wed, 18 Apr 2018 19:05:49 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Dave Hansen <dave.hansen@...ux.intel.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, Dave Hansen <dave.hansen@...ux.intel.com>,
        mceier@...il.com, aaro.koskinen@...ia.com, aarcange@...hat.com,
        luto@...nel.org, arjan@...ux.intel.com, bp@...en8.de,
        dan.j.williams@...el.com, dwmw2@...radead.org,
        gregkh@...uxfoundation.org, hughd@...gle.com, jpoimboe@...hat.com,
        jgross@...e.com, keescook@...gle.com,
        torvalds@...ux-foundation.org, namit@...are.com,
        peterz@...radead.org, tglx@...utronix.de
Subject: Re: [PATCH 2/2] x86, pti: fix boot warning from Global-bit setting

Hi Dave,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on tip/x86/core]
[also build test ERROR on v4.17-rc1 next-20180418]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Dave-Hansen/x86-pti-fix-boot-problems-from-Global-bit-setting/20180418-181719
config: i386-randconfig-x000-201815 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   arch/x86/mm/pageattr.c: In function '__cpa_pfn_in_highmap':
>> arch/x86/mm/pageattr.c:1161:31: error: implicit declaration of function 'highmap_start_pfn'; did you mean 'node_start_pfn'? [-Werror=implicit-function-declaration]
     return within_inclusive(pfn, highmap_start_pfn(),
                                  ^~~~~~~~~~~~~~~~~
                                  node_start_pfn
>> arch/x86/mm/pageattr.c:1162:4: error: implicit declaration of function 'highmap_end_pfn'; did you mean 'pgdat_end_pfn'? [-Werror=implicit-function-declaration]
       highmap_end_pfn());
       ^~~~~~~~~~~~~~~
       pgdat_end_pfn
   cc1: some warnings being treated as errors

vim +1161 arch/x86/mm/pageattr.c

  1154	
  1155	bool __cpa_pfn_in_highmap(unsigned long pfn)
  1156	{
  1157		/*
  1158		 * Kernel text has an alias mapping at a high address, known
  1159		 * here as "highmap".
  1160		 */
> 1161		return within_inclusive(pfn, highmap_start_pfn(),
> 1162				highmap_end_pfn());
  1163	}
  1164	

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