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SubjectRe: [PATCHv2 07/12] mm: convert try_to_unmap_one() to page_vma_mapped_walk()
Hi Kirill,

[auto build test ERROR on mmotm/master]
[also build test ERROR on v4.10-rc5 next-20170125]
[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/Kirill-A-Shutemov/Fix-few-rmap-related-THP-bugs/20170126-023339
base: git://git.cmpxchg.org/linux-mmotm.git master
config: parisc-c3000_defconfig (attached as .config)
compiler: hppa-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=parisc

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

In file included from include/linux/mmzone.h:20:0,
from include/linux/gfp.h:5,
from include/linux/mm.h:9,
from mm/rmap.c:48:
mm/rmap.c: In function 'try_to_unmap_one':
>> arch/parisc/include/asm/page.h:48:24: error: 'pvmw.pte' is a pointer; did you mean to use '->'?
#define pte_val(x) ((x).pte)
^
->
>> arch/parisc/include/asm/pgtable.h:410:22: note: in expansion of macro 'pte_val'
#define pte_pfn(x) (pte_val(x) >> PFN_PTE_SHIFT)
^~~~~~~
>> mm/rmap.c:1520:34: note: in expansion of macro 'pte_pfn'
flush_cache_page(vma, address, pte_pfn(pvmw.pte));
^~~~~~~

vim +/pte_pfn +1520 mm/rmap.c

1504 break;
1505 }
1506 if (flags & TTU_MUNLOCK)
1507 continue;
1508 }
1509
1510 if (!(flags & TTU_IGNORE_ACCESS)) {
1511 if (ptep_clear_flush_young_notify(vma, address,
1512 pvmw.pte)) {
1513 ret = SWAP_FAIL;
1514 page_vma_mapped_walk_done(&pvmw);
1515 break;
1516 }
1517 }
1518
1519 /* Nuke the page table entry. */
> 1520 flush_cache_page(vma, address, pte_pfn(pvmw.pte));
1521 if (should_defer_flush(mm, flags)) {
1522 /*
1523 * We clear the PTE but do not flush so potentially
1524 * a remote CPU could still be writing to the page.
1525 * If the entry was previously clean then the
1526 * architecture must guarantee that a clear->dirty
1527 * transition on a cached TLB entry is written through
1528 * and traps if the PTE is unmapped.

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