Re: [PATCH 6/6] sysctl: Add global tunable mt_page_copy

From: Anshuman Khandual
Date: Wed Mar 08 2017 - 10:39:41 EST

On 02/17/2017 09:00 PM, kbuild test robot wrote:
> Hi Zi,
> [auto build test ERROR on linus/master]
> [also build test ERROR on v4.10-rc8 next-20170217]
> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
> url:
> config: i386-randconfig-a0-02131010 (attached as .config)
> compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901

Though I dont have the same compiler, I am unable to reproduce this
build failure exactly. The build fails but for a different symbol.
I have the following gcc version but does it really make a
difference with respect to finding the symbol etc ?

gcc (Ubuntu 4.9.2-10ubuntu13) 4.9.2

mm/memory.c: In function ‘copy_pmd_range’:
mm/memory.c:1002:3: error: implicit declaration of function
‘pmd_related’ [-Werror=implicit-function-declaration]
if (pmd_related(*src_pmd)) {
cc1: some warnings being treated as errors
scripts/ recipe for target 'mm/memory.o' failed