On Sun, Oct 13, 2019 at 11:43:10PM -0700, John Hubbard wrote: > On 10/13/19 11:12 PM, kbuild test robot wrote: > > 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 > > > > OK, so this shows that my cross-compiler test scripts are faulty lately, > sorry I missed this. > > But more importantly, the above missed case is an example of when "write" really > means "write", as opposed to meaning flags. > > Please put this patch on hold or drop it, until we hear from the authors as to how > they would like to resolve this. I suspect it will end up as something like: > > bool write = (flags & FOLL_WRITE); > > ...perhaps? Just use if (!pte_access_permitted(pte, flags & FOLL_WRITE)) as we have in gup_pte_range(). And add: Fixes: cbd34da7dc9a ("mm: move the powerpc hugepd code to mm/gup.c") -- Kirill A. Shutemov
