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SubjectRe: [PATCH 1/2] mm, thp: introduce dedicated transparent huge page allocation interfaces
Hi Changbin,

[auto build test ERROR on mmotm/master]
[also build test ERROR on v4.14-rc5 next-20171017]
[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/changbin-du-intel-com/mm-thp-introduce-dedicated-transparent-huge-page-allocation-interfaces/20171018-230128
base: git://git.cmpxchg.org/linux-mmotm.git master
config: i386-randconfig-x001-201742 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
# save the attached .config to linux build tree
make ARCH=i386

All error/warnings (new ones prefixed by >>):

In file included from include/linux/balloon_compaction.h:48:0,
from drivers/virtio/virtio_balloon.c:29:
include/linux/migrate.h: In function 'new_page_nodemask':
>> include/linux/migrate.h:49:10: error: implicit declaration of function 'alloc_transhuge_page_nodemask' [-Werror=implicit-function-declaration]
return alloc_transhuge_page_nodemask(gfp_mask | GFP_TRANSHUGE,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> include/linux/migrate.h:49:10: warning: return makes pointer from integer without a cast [-Wint-conversion]
return alloc_transhuge_page_nodemask(gfp_mask | GFP_TRANSHUGE,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
preferred_nid, nodemask);
~~~~~~~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors

vim +/alloc_transhuge_page_nodemask +49 include/linux/migrate.h

33
34 static inline struct page *new_page_nodemask(struct page *page,
35 int preferred_nid, nodemask_t *nodemask)
36 {
37 gfp_t gfp_mask = GFP_USER | __GFP_MOVABLE | __GFP_RETRY_MAYFAIL;
38 unsigned int order = 0;
39 struct page *new_page = NULL;
40
41 if (PageHuge(page))
42 return alloc_huge_page_nodemask(page_hstate(compound_head(page)),
43 preferred_nid, nodemask);
44
45 if (PageHighMem(page) || (zone_idx(page_zone(page)) == ZONE_MOVABLE))
46 gfp_mask |= __GFP_HIGHMEM;
47
48 if (thp_migration_supported() && PageTransHuge(page))
> 49 return alloc_transhuge_page_nodemask(gfp_mask | GFP_TRANSHUGE,
50 preferred_nid, nodemask);
51 else
52 return __alloc_pages_nodemask(gfp_mask, order,
53 preferred_nid, nodemask);
54
55 return new_page;
56 }
57

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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