tree: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git fscache-iter head: 0764bb737d1e6bd5cc9f30fa2df637324282fdda commit: 67b9296c1b631dd7ab17ea2b68868afa18b9bccf [30/66] fscache: read-helper: Add cache ops to support the helper config: openrisc-randconfig-r013-20200922 (attached as .config) compiler: or1k-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 git checkout 67b9296c1b631dd7ab17ea2b68868afa18b9bccf # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=openrisc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from fs/fscache/read_helper.c:16: fs/fscache/internal.h: In function 'fscache_prepare_read': 62 | if (subreq->start >= rreq->i_size) | ^~~~ | rseq fs/fscache/internal.h:62:23: note: each undeclared identifier is reported only once for each function it appears in # https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/com... git remote add dhowells-fs https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git git fetch --no-tags dhowells-fs fscache-iter git checkout 67b9296c1b631dd7ab17ea2b68868afa18b9bccf vim +62 fs/fscache/internal.h 50 51 static inline 52 enum fscache_read_source fscache_prepare_read(struct fscache_read_subrequest *subreq, 53 loff_t i_size) 54 { 55 #if __fscache_available 56 struct fscache_read_request *rreq = subreq->rreq; 57 struct fscache_op_resources *opr = &rreq->cache_resources; 58 59 if (fscache_object_valid(opr->object)) 60 return opr->object->cache->ops->prepare_read(subreq, i_size); 61 #endif 63 return FSCACHE_FILL_WITH_ZEROES; 64 return FSCACHE_DOWNLOAD_FROM_SERVER; 65 } 66 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org