Re: [PATCH] mm/thp/migration: switch from flush_tlb_range to flush_pmd_tlb_range

From: kbuild test robot
Date: Wed Feb 10 2016 - 01:12:42 EST


Hi Aneesh,

[auto build test ERROR on v4.5-rc3]
[also build test ERROR on next-20160209]
[cannot apply to arc/for-next]
[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/Aneesh-Kumar-K-V/mm-thp-migration-switch-from-flush_tlb_range-to-flush_pmd_tlb_range/20160210-135701
config: x86_64-randconfig-x012-201606 (attached as .config)
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64

All errors (new ones prefixed by >>):

mm/migrate.c: In function 'migrate_misplaced_transhuge_page':
>> mm/migrate.c:1833:3: error: implicit declaration of function 'flush_pmd_tlb_range' [-Werror=implicit-function-declaration]
flush_pmd_tlb_range(vma, mmun_start, mmun_end);
^
cc1: some warnings being treated as errors

vim +/flush_pmd_tlb_range +1833 mm/migrate.c

1827 pmdp_huge_clear_flush_notify(vma, mmun_start, pmd);
1828 set_pmd_at(mm, mmun_start, pmd, entry);
1829 update_mmu_cache_pmd(vma, address, &entry);
1830
1831 if (page_count(page) != 2) {
1832 set_pmd_at(mm, mmun_start, pmd, orig_entry);
> 1833 flush_pmd_tlb_range(vma, mmun_start, mmun_end);
1834 mmu_notifier_invalidate_range(mm, mmun_start, mmun_end);
1835 update_mmu_cache_pmd(vma, address, &entry);
1836 page_remove_rmap(new_page, true);

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