tree: https://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux.git ceph-fscache-iter head: 3e988e691f03e14d299a34cc55ee7f0e6a780a5d commit: 7667a7ac7f50d005470206a0f18928747edffb63 [66/76] fscache: Handle readpages always getting contig pages and simplify config: c6x-randconfig-r033-20200526 (attached as .config) compiler: c6x-elf-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 7667a7ac7f50d005470206a0f18928747edffb63 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=c6x 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 <<): fs/fscache/read_helper.c: In function 'fscache_read_helper': 278 | pgoff_t eof, cursor, start, trailer = ULONG_MAX; | ^~~~~~~ vim +/trailer +278 fs/fscache/read_helper.c 240 241 /** 242 * fscache_read_helper - Helper to manage a read request 243 * @req: The initialised request structure to use 244 * @requested_page: Singular page to include (LOCKED_PAGE/FOR_WRITE) 245 * @pages: Unattached pages to include (PAGE_LIST) 246 * @primary_index: The index of the primary page (FOR_WRITE) 247 * @max_pages: The maximum number of pages to read in one transaction 248 * @type: FSCACHE_READ_* 249 * @aop_flags: AOP_FLAG_* 250 * 251 * Read a sequence of pages appropriately sized for an fscache allocation 252 * block. Pages are added at both ends and to fill in the gaps as appropriate 253 * to make it the right size. 254 * 255 * req->mapping should indicate the mapping to which the pages will be attached. 256 * 257 * The operations pointed to by req->ops will be used to issue or reissue a 258 * read against the server in case the cache is unavailable, incomplete or 259 * generates an error. req->iter will be set up to point to the iterator 260 * representing the buffer to be filled in. 261 * 262 * A ref on @req is consumed eventually by this function or one of its 263 * eventually-dispatched callees. 264 */ 265 int fscache_read_helper(struct fscache_io_request *req, 266 struct page **requested_page, 267 struct list_head *pages, 268 pgoff_t primary_index, 269 pgoff_t max_pages, 270 enum fscache_read_type type, 271 unsigned int aop_flags) 272 { 273 struct fscache_extent extent; 274 struct address_space *mapping = req->mapping; 275 struct page *page; 276 enum fscache_read_helper_trace what; 277 unsigned int notes; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org