Re: [PATCH] cpuset: use static key better and convert to new API

From: kbuild test robot
Date: Wed Apr 06 2016 - 04:57:52 EST


Hi Vlastimil,

[auto build test WARNING on v4.6-rc2]
[also build test WARNING on next-20160406]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url: https://github.com/0day-ci/linux/commits/Vlastimil-Babka/cpuset-use-static-key-better-and-convert-to-new-API/20160406-164542
config: x86_64-randconfig-x007-201614 (attached as .config)
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64

All warnings (new ones prefixed by >>):

In file included from include/uapi/linux/stddef.h:1:0,
from include/linux/stddef.h:4,
from mm/page_alloc.c:17:
mm/page_alloc.c: In function 'get_page_from_freelist':
mm/page_alloc.c:2653:5: error: implicit declaration of function '__cpuset_zone_allowed' [-Werror=implicit-function-declaration]
!__cpuset_zone_allowed(zone, gfp_mask))
^
include/linux/compiler.h:151:30: note: in definition of macro '__trace_if'
if (__builtin_constant_p(!!(cond)) ? !!(cond) : \
^
>> mm/page_alloc.c:2651:3: note: in expansion of macro 'if'
if (cpusets_enabled() &&
^
cc1: some warnings being treated as errors

vim +/if +2651 mm/page_alloc.c

7fb1d9fca Rohit Seth 2005-11-13 2635 struct page *page = NULL;
5117f45d1 Mel Gorman 2009-06-16 2636 struct zone *zone;
4ffeaf356 Mel Gorman 2014-08-06 2637 int nr_fair_skipped = 0;
4ffeaf356 Mel Gorman 2014-08-06 2638 bool zonelist_rescan;
54a6eb5c4 Mel Gorman 2008-04-28 2639
9276b1bc9 Paul Jackson 2006-12-06 2640 zonelist_scan:
4ffeaf356 Mel Gorman 2014-08-06 2641 zonelist_rescan = false;
4ffeaf356 Mel Gorman 2014-08-06 2642
7fb1d9fca Rohit Seth 2005-11-13 2643 /*
9276b1bc9 Paul Jackson 2006-12-06 2644 * Scan zonelist, looking for a zone with enough free.
344736f29 Vladimir Davydov 2014-10-20 2645 * See also __cpuset_node_allowed() comment in kernel/cpuset.c.
7fb1d9fca Rohit Seth 2005-11-13 2646 */
a9263751e Vlastimil Babka 2015-02-11 2647 for_each_zone_zonelist_nodemask(zone, z, zonelist, ac->high_zoneidx,
a9263751e Vlastimil Babka 2015-02-11 2648 ac->nodemask) {
e085dbc52 Johannes Weiner 2013-09-11 2649 unsigned long mark;
e085dbc52 Johannes Weiner 2013-09-11 2650
664eeddee Mel Gorman 2014-06-04 @2651 if (cpusets_enabled() &&
664eeddee Mel Gorman 2014-06-04 2652 (alloc_flags & ALLOC_CPUSET) &&
a8f315757 Vlastimil Babka 2016-04-06 2653 !__cpuset_zone_allowed(zone, gfp_mask))
cd38b115d Mel Gorman 2011-07-25 2654 continue;
a756cf590 Johannes Weiner 2012-01-10 2655 /*
81c0a2bb5 Johannes Weiner 2013-09-11 2656 * Distribute pages in proportion to the individual
81c0a2bb5 Johannes Weiner 2013-09-11 2657 * zone size to ensure fair page aging. The zone a
81c0a2bb5 Johannes Weiner 2013-09-11 2658 * page was allocated in should have no effect on the
81c0a2bb5 Johannes Weiner 2013-09-11 2659 * time the page has in memory before being reclaimed.

:::::: The code at line 2651 was first introduced by commit
:::::: 664eeddeef6539247691197c1ac124d4aa872ab6 mm: page_alloc: use jump labels to avoid checking number_of_cpusets

:::::: TO: Mel Gorman <mgorman@xxxxxxx>
:::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>

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