Hi Jeffle, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on dhowells-fs/fscache-next] [cannot apply to xiang-erofs/dev-test ceph-client/for-linus linus/master v5.16-rc7 next-20211224] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Jeffle-Xu/fscache-erofs-fscache-based-demand-read-semantics/20211227-205742 base: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git fscache-next config: csky-defconfig (https://download.01.org/0day-ci/archive/20211227/202112272340.1ho7sEjG-lkp@xxxxxxxxx/config) compiler: csky-linux-gcc (GCC) 11.2.0 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/54c300b4598e3f2836d8233681da387fe388cfda git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Jeffle-Xu/fscache-erofs-fscache-based-demand-read-semantics/20211227-205742 git checkout 54c300b4598e3f2836d8233681da387fe388cfda # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=csky SHELL=/bin/bash fs/cachefiles/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): fs/cachefiles/io.c:564:5: warning: no previous prototype for 'cachefiles_demand_read' [-Wmissing-prototypes] 564 | int cachefiles_demand_read(struct netfs_cache_resources *cres, | ^~~~~~~~~~~~~~~~~~~~~~ In function 'cachefiles_alloc_req', inlined from 'cachefiles_demand_read' at fs/cachefiles/io.c:575:8: >> fs/cachefiles/io.c:557:9: warning: 'strncpy' specified bound 255 equals destination size [-Wstringop-truncation] 557 | strncpy(req_in->path, object->d_name, sizeof(req_in->path)); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/strncpy +557 fs/cachefiles/io.c 541 542 static struct cachefiles_req *cachefiles_alloc_req(struct cachefiles_object *object, 543 loff_t start_pos, 544 size_t len) 545 { 546 struct cachefiles_req *req; 547 struct cachefiles_req_in *req_in; 548 549 req = kzalloc(sizeof(*req), GFP_KERNEL); 550 if (!req) 551 return NULL; 552 553 req_in = &req->req_in; 554 555 req_in->off = start_pos; 556 req_in->len = len; > 557 strncpy(req_in->path, object->d_name, sizeof(req_in->path)); 558 559 init_completion(&req->done); 560 561 return req; 562 } 563 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx