tree:   git://git.cmpxchg.org/linux-mmotm.git master
head:   a2d887dee78e23dc092ff14ae2ad22592437a328
commit: 304e521b912aa95514a5b66f7d6795d096f15535 [210/397] mm/zsmalloc: support allocating obj with size of ZS_MAX_ALLOC_SIZE
config: x86_64-randconfig-c2-1109 (attached as .config)
reproduce:
  git checkout 304e521b912aa95514a5b66f7d6795d096f15535
  # save the attached .config to linux build tree
  make ARCH=x86_64 

Note: the mmotm/master HEAD a2d887dee78e23dc092ff14ae2ad22592437a328 builds fine.
      It only hurts bisectibility.

All error/warnings:

   mm/zsmalloc.c: In function 'zs_create_pool':
>> mm/zsmalloc.c:1021:11: error: 'ZS_SIZE_CLASSES' undeclared (first use in this function)
      if (i < ZS_SIZE_CLASSES - 1) {
              ^
   mm/zsmalloc.c:1021:11: note: each undeclared identifier is reported only once for each function it appears in

vim +/ZS_SIZE_CLASSES +1021 mm/zsmalloc.c

62a4dc89 Joonsoo Kim 2014-11-27  1015  		 * have one size_class for each size, there is a chance that we
62a4dc89 Joonsoo Kim 2014-11-27  1016  		 * can get more memory utilization if we use one size_class for
62a4dc89 Joonsoo Kim 2014-11-27  1017  		 * many different sizes whose size_class have same
62a4dc89 Joonsoo Kim 2014-11-27  1018  		 * characteristics. So, we makes size_class point to
62a4dc89 Joonsoo Kim 2014-11-27  1019  		 * previous size_class if possible.
62a4dc89 Joonsoo Kim 2014-11-27  1020  		 */
62a4dc89 Joonsoo Kim 2014-11-27 @1021  		if (i < ZS_SIZE_CLASSES - 1) {
62a4dc89 Joonsoo Kim 2014-11-27  1022  			prev_class = pool->size_class[i + 1];
62a4dc89 Joonsoo Kim 2014-11-27  1023  			if (can_merge(prev_class, size, pages_per_zspage)) {
62a4dc89 Joonsoo Kim 2014-11-27  1024  				pool->size_class[i] = prev_class;

:::::: The code at line 1021 was first introduced by commit
:::::: 62a4dc89f79363e2456ce2fc68e5719ef528893f zsmalloc: merge size_class to reduce fragmentation

:::::: TO: Joonsoo Kim <iamjoonsoo.kim@lge.com>
:::::: CC: Johannes Weiner <hannes@cmpxchg.org>

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