tree: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git fscache-iter head: 59f33c90ef6c1a75d4af75e5f60d98c0d965b6a2 commit: 410180e063ecff3337fea5519bcf12410f13986e [33/61] cachefiles: Implement extent shaper config: csky-defconfig (attached as .config) compiler: csky-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 410180e063ecff3337fea5519bcf12410f13986e # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=csky If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): In file included from include/linux/kernel.h:15, from include/linux/list.h:9, from include/linux/mount.h:14, from fs/cachefiles/content-map.c:8: fs/cachefiles/content-map.c: In function 'cachefiles_expand_content_map': fs/cachefiles/internal.h:304:36: warning: format '%lx' expects argument of type 'long unsigned int', but argument 4 has type 'size_t' {aka 'unsigned int'} [-Wformat=] 304 | #define _enter(FMT, ...) no_printk("==> %s("FMT")", __func__, ##__VA_ARGS__) | ^~~~~~~~~ include/linux/printk.h:137:10: note: in definition of macro 'no_printk' 137 | printk(fmt, ##__VA_ARGS__); | ^~~ 260 | _enter("%llx,%lx,%x", i_size, size, object->content_map_size); | ^~~~~~ fs/cachefiles/content-map.c:260:17: note: format string is defined here 260 | _enter("%llx,%lx,%x", i_size, size, object->content_map_size); | ~~^ | | | long unsigned int | %x vim +/_enter +260 fs/cachefiles/content-map.c 249 250 /* 251 * Expand the content map to a larger file size. 252 */ 253 void cachefiles_expand_content_map(struct cachefiles_object *object, loff_t i_size) 254 { 255 size_t size; 256 u8 *map, *zap; 257 258 size = cachefiles_map_size(i_size); 259 261 262 if (size <= object->content_map_size) 263 return; 264 265 map = kzalloc(size, GFP_KERNEL); 266 if (!map) 267 return; 268 269 write_lock_bh(&object->content_map_lock); 270 if (size > object->content_map_size) { 271 zap = object->content_map; 272 memcpy(map, zap, object->content_map_size); 273 object->content_map = map; 274 object->content_map_size = size; 275 } else { 276 zap = map; 277 } 278 write_unlock_bh(&object->content_map_lock); 279 280 kfree(zap); 281 } 282 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org