Hi Theodore, I love your patch! Yet something to improve: [auto build test ERROR on tip/perf/core] [also build test ERROR on linus/master v5.5-rc3 next-20191220] [cannot apply to tytso-fscrypt/master] [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/Theodore-Ts-o/memcg-fix-a-crash-in-wb_workfn-when-a-device-disappears/20191228-035221 base: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 1f676247f36a4bdea134de5e8bc5041db9678c4e config: nds32-allnoconfig (attached as .config) compiler: nds32le-linux-gcc (GCC) 9.2.0 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=9.2.0 make.cross ARCH=nds32 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> All error/warnings (new ones prefixed by >>): In file included from mm/fadvise.c:16: include/linux/backing-dev.h: In function 'bdi_dev_name': >> include/linux/backing-dev.h:513:9: error: implicit declaration of function 'dev_name' [-Werror=implicit-function-declaration] 513 | return dev_name(bdi->dev); | ^~~~~~~~ >> include/linux/backing-dev.h:513:9: warning: returning 'int' from a function with return type 'const char *' makes pointer from integer without a cast [-Wint-conversion] 513 | return dev_name(bdi->dev); | ^~~~~~~~~~~~~~~~~~ In file included from include/linux/node.h:18, from include/linux/cpu.h:17, from include/linux/perf_event.h:50, from include/linux/trace_events.h:10, from include/trace/syscall.h:7, from include/linux/syscalls.h:85, from mm/fadvise.c:20: include/linux/device.h: At top level: include/linux/device.h:1370:27: error: conflicting types for 'dev_name' 1370 | static inline const char *dev_name(const struct device *dev) | ^~~~~~~~ In file included from mm/fadvise.c:16: include/linux/backing-dev.h:513:9: note: previous implicit declaration of 'dev_name' was here 513 | return dev_name(bdi->dev); | ^~~~~~~~ cc1: some warnings being treated as errors -- In file included from fs/super.c:32: include/linux/backing-dev.h: In function 'bdi_dev_name': >> include/linux/backing-dev.h:513:9: error: implicit declaration of function 'dev_name' [-Werror=implicit-function-declaration] 513 | return dev_name(bdi->dev); | ^~~~~~~~ >> include/linux/backing-dev.h:513:9: warning: returning 'int' from a function with return type 'const char *' makes pointer from integer without a cast [-Wint-conversion] 513 | return dev_name(bdi->dev); | ^~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/dev_name +513 include/linux/backing-dev.h 508 509 static inline const char *bdi_dev_name(struct backing_dev_info *bdi) 510 { 511 if (!bdi || !bdi->dev) 512 return bdi_unknown_name; > 513 return dev_name(bdi->dev); 514 } 515 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx Intel Corporation
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