Hi John, Thank you for the patch! Yet something to improve: [auto build test ERROR on linus/master] [cannot apply to v5.4-rc3 next-20191011] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/John-Hubbard/gup-c-gup_benchmark-c-trivial-fixes-before-the-storm/20191014-114158 config: powerpc-defconfig (attached as .config) compiler: powerpc64-linux-gcc (GCC) 7.4.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=7.4.0 make.cross ARCH=powerpc If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): mm/gup.c: In function 'gup_hugepte': >> mm/gup.c:1990:33: error: 'write' undeclared (first use in this function); did you mean 'writeq'? if (!pte_access_permitted(pte, write)) ^~~~~ writeq mm/gup.c:1990:33: note: each undeclared identifier is reported only once for each function it appears in vim +1990 mm/gup.c cbd34da7dc9afd Christoph Hellwig 2019-07-11 1974 cbd34da7dc9afd Christoph Hellwig 2019-07-11 1975 static int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long addr, cc492e4c15e804 John Hubbard 2019-10-13 1976 unsigned long end, int flags, struct page **pages, cc492e4c15e804 John Hubbard 2019-10-13 1977 int *nr) cbd34da7dc9afd Christoph Hellwig 2019-07-11 1978 { cbd34da7dc9afd Christoph Hellwig 2019-07-11 1979 unsigned long pte_end; cbd34da7dc9afd Christoph Hellwig 2019-07-11 1980 struct page *head, *page; cbd34da7dc9afd Christoph Hellwig 2019-07-11 1981 pte_t pte; cbd34da7dc9afd Christoph Hellwig 2019-07-11 1982 int refs; cbd34da7dc9afd Christoph Hellwig 2019-07-11 1983 cbd34da7dc9afd Christoph Hellwig 2019-07-11 1984 pte_end = (addr + sz) & ~(sz-1); cbd34da7dc9afd Christoph Hellwig 2019-07-11 1985 if (pte_end < end) cbd34da7dc9afd Christoph Hellwig 2019-07-11 1986 end = pte_end; cbd34da7dc9afd Christoph Hellwig 2019-07-11 1987 cbd34da7dc9afd Christoph Hellwig 2019-07-11 1988 pte = READ_ONCE(*ptep); cbd34da7dc9afd Christoph Hellwig 2019-07-11 1989 cbd34da7dc9afd Christoph Hellwig 2019-07-11 @1990 if (!pte_access_permitted(pte, write)) cbd34da7dc9afd Christoph Hellwig 2019-07-11 1991 return 0; cbd34da7dc9afd Christoph Hellwig 2019-07-11 1992 cbd34da7dc9afd Christoph Hellwig 2019-07-11 1993 /* hugepages are never "special" */ cbd34da7dc9afd Christoph Hellwig 2019-07-11 1994 VM_BUG_ON(!pfn_valid(pte_pfn(pte))); cbd34da7dc9afd Christoph Hellwig 2019-07-11 1995 cbd34da7dc9afd Christoph Hellwig 2019-07-11 1996 refs = 0; cbd34da7dc9afd Christoph Hellwig 2019-07-11 1997 head = pte_page(pte); cbd34da7dc9afd Christoph Hellwig 2019-07-11 1998 cbd34da7dc9afd Christoph Hellwig 2019-07-11 1999 page = head + ((addr & (sz-1)) >> PAGE_SHIFT); cbd34da7dc9afd Christoph Hellwig 2019-07-11 2000 do { cbd34da7dc9afd Christoph Hellwig 2019-07-11 2001 VM_BUG_ON(compound_head(page) != head); cbd34da7dc9afd Christoph Hellwig 2019-07-11 2002 pages[*nr] = page; cbd34da7dc9afd Christoph Hellwig 2019-07-11 2003 (*nr)++; cbd34da7dc9afd Christoph Hellwig 2019-07-11 2004 page++; cbd34da7dc9afd Christoph Hellwig 2019-07-11 2005 refs++; cbd34da7dc9afd Christoph Hellwig 2019-07-11 2006 } while (addr += PAGE_SIZE, addr != end); cbd34da7dc9afd Christoph Hellwig 2019-07-11 2007 01a369160bbea4 Christoph Hellwig 2019-07-11 2008 head = try_get_compound_head(head, refs); 01a369160bbea4 Christoph Hellwig 2019-07-11 2009 if (!head) { cbd34da7dc9afd Christoph Hellwig 2019-07-11 2010 *nr -= refs; cbd34da7dc9afd Christoph Hellwig 2019-07-11 2011 return 0; cbd34da7dc9afd Christoph Hellwig 2019-07-11 2012 } cbd34da7dc9afd Christoph Hellwig 2019-07-11 2013 cbd34da7dc9afd Christoph Hellwig 2019-07-11 2014 if (unlikely(pte_val(pte) != pte_val(*ptep))) { cbd34da7dc9afd Christoph Hellwig 2019-07-11 2015 /* Could be optimized better */ cbd34da7dc9afd Christoph Hellwig 2019-07-11 2016 *nr -= refs; cbd34da7dc9afd Christoph Hellwig 2019-07-11 2017 while (refs--) cbd34da7dc9afd Christoph Hellwig 2019-07-11 2018 put_page(head); cbd34da7dc9afd Christoph Hellwig 2019-07-11 2019 return 0; cbd34da7dc9afd Christoph Hellwig 2019-07-11 2020 } cbd34da7dc9afd Christoph Hellwig 2019-07-11 2021 520b4a4496f12b Christoph Hellwig 2019-07-11 2022 SetPageReferenced(head); cbd34da7dc9afd Christoph Hellwig 2019-07-11 2023 return 1; cbd34da7dc9afd Christoph Hellwig 2019-07-11 2024 } cbd34da7dc9afd Christoph Hellwig 2019-07-11 2025 :::::: The code at line 1990 was first introduced by commit :::::: cbd34da7dc9afd521e0bea5e7d12701f4a9da7c7 mm: move the powerpc hugepd code to mm/gup.c :::::: TO: Christoph Hellwig <hch@xxxxxx> :::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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