On Tue, Mar 09, 2021 at 05:29:30AM +0800, kernel test robot wrote: > Hi Minchan, > > I love your patch! Perhaps something to improve: > > [auto build test WARNING on hnaz-linux-mm/master] > > url: > https://github.com/0day-ci/linux/commits/Minchan-Kim/mm-page_alloc-dump-migrate-failed-pages/20210309-042205 > base: https://github.com/hnaz/linux-mm master > config: m68k-allmodconfig (attached as .config) > compiler: m68k-linux-gcc (GCC) 9.3.0 > reproduce (this is a W=1 build): > wget > https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O > ~/bin/make.cross > chmod +x ~/bin/make.cross > # > https://github.com/0day-ci/linux/commit/3c635af37b862e9c601ee8d5818f7da9cd3e2e57 > git remote add linux-review https://github.com/0day-ci/linux > git fetch --no-tags linux-review > Minchan-Kim/mm-page_alloc-dump-migrate-failed-pages/20210309-042205 > git checkout 3c635af37b862e9c601ee8d5818f7da9cd3e2e57 > # save the attached .config to linux build tree > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross > ARCH=m68k > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <l...@intel.com> > > All warnings (new ones prefixed by >>): > > arch/m68k/include/asm/page_mm.h:169:49: warning: ordered comparison of > pointer with null pointer [-Wextra] > 169 | #define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void > *)PAGE_OFFSET && (void *)(kaddr) < high_memory) > | ^~ > include/linux/compiler.h:78:42: note: in definition of macro 'unlikely' > 78 | # define unlikely(x) __builtin_expect(!!(x), 0) > | ^ > include/linux/scatterlist.h:143:2: note: in expansion of macro 'BUG_ON' > 143 | BUG_ON(!virt_addr_valid(buf)); > | ^~~~~~ > include/linux/scatterlist.h:143:10: note: in expansion of macro > 'virt_addr_valid' > 143 | BUG_ON(!virt_addr_valid(buf)); > | ^~~~~~~~~~~~~~~ > In file included from arch/m68k/include/asm/page.h:60, > from arch/m68k/include/asm/thread_info.h:6, > from include/linux/thread_info.h:38, > from include/asm-generic/preempt.h:5, > from ./arch/m68k/include/generated/asm/preempt.h:1, > from include/linux/preempt.h:78, > from include/linux/spinlock.h:51, > from include/linux/mmzone.h:8, > from include/linux/gfp.h:6, > from include/linux/mm.h:10, > from mm/page_alloc.c:19:
I am not sure this is triggered by the patch since I could see the warn with reverting the patch.
