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SubjectRe: [PATCH 1/2] mm: move vma_is_anonymous check within pmd_move_must_withdraw
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kbuild test robot <lkp@intel.com> writes:

> Hi Aneesh,
>
> [auto build test ERROR on mmotm/master]
> [also build test ERROR on v4.9-rc4 next-20161028]
> [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/Aneesh-Kumar-K-V/mm-move-vma_is_anonymous-check-within-pmd_move_must_withdraw/20161107-164033
> base: git://git.cmpxchg.org/linux-mmotm.git master
> config: i386-randconfig-x006-201645 (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 >>):
>
> mm/huge_memory.c: In function 'pmd_move_must_withdraw':
>>> mm/huge_memory.c:1441:58: error: 'vma' undeclared (first use in this function)
> return (new_pmd_ptl != old_pmd_ptl) && vma_is_anonymous(vma);
> ^~~
> mm/huge_memory.c:1441:58: note: each undeclared identifier is reported only once for each function it appears in
>>> mm/huge_memory.c:1442:1: warning: control reaches end of non-void function [-Wreturn-type]
> }
> ^
>
> vim +/vma +1441 mm/huge_memory.c
>
> 1435 /*
> 1436 * With split pmd lock we also need to move preallocated
> 1437 * PTE page table if new_pmd is on different PMD page table.
> 1438 *
> 1439 * We also don't deposit and withdraw tables for file pages.
> 1440 */
>> 1441 return (new_pmd_ptl != old_pmd_ptl) && vma_is_anonymous(vma);
>> 1442 }
> 1443 #endif
> 1444
> 1445 bool move_huge_pmd(struct vm_area_struct *vma, unsigned long old_addr,
>

My bad, I didn't test with hugepage enabled for x86. Will fixup in the
next update.

-aneesh

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