tree: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git fscache-iter head: 757ac8b16a0edd3befa15c9bdcb2ab3811be945d commit: e7242eaae0e94cafdcbe04c110ab787715b618b5 [37/60] fscache: Add read helper config: microblaze-randconfig-r026-20200723 (attached as .config) compiler: microblaze-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 e7242eaae0e94cafdcbe04c110ab787715b618b5 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=microblaze 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 >>): microblaze-linux-ld: fs/fscache/read_helper.o: in function `fscache_write': microblaze-linux-ld: fs/fscache/read_helper.o: in function `fscache_read': microblaze-linux-ld: fs/fscache/read_helper.o: in function `queue_work': microblaze-linux-ld: fs/fscache/read_helper.o: in function `fscache_shape_request': vim +607 include/linux/fscache.h 076cf3d60a360f3 David Howells 2020-02-06 511 076cf3d60a360f3 David Howells 2020-02-06 512 /** 076cf3d60a360f3 David Howells 2020-02-06 513 * fscache_shape_request - Shape an request to fit cache granulation 076cf3d60a360f3 David Howells 2020-02-06 514 * @cookie: The cache cookie to access 076cf3d60a360f3 David Howells 2020-02-06 515 * @shape: The request proposed by the VM/filesystem (gets modified). 076cf3d60a360f3 David Howells 2020-02-06 516 * 076cf3d60a360f3 David Howells 2020-02-06 517 * Shape the size and position of a cache I/O request such that either the 076cf3d60a360f3 David Howells 2020-02-06 518 * region will entirely be read from the server or entirely read from the 076cf3d60a360f3 David Howells 2020-02-06 519 * cache. The proposed region may be adjusted by a combination of extending 076cf3d60a360f3 David Howells 2020-02-06 520 * the front forward and/or extending or shrinking the end. In any case, the 076cf3d60a360f3 David Howells 2020-02-06 521 * first page of the proposed request will be contained in the revised extent. 076cf3d60a360f3 David Howells 2020-02-06 522 * 076cf3d60a360f3 David Howells 2020-02-06 523 * The function sets shape->to_be_done to FSCACHE_READ_FROM_CACHE to indicate 076cf3d60a360f3 David Howells 2020-02-06 524 * that the data is resident in the cache and can be read from there, 076cf3d60a360f3 David Howells 2020-02-06 525 * FSCACHE_WRITE_TO_CACHE to indicate that the data isn't present, but the 076cf3d60a360f3 David Howells 2020-02-06 526 * netfs should write it, FSCACHE_FILL_WITH_ZERO to indicate that the data 076cf3d60a360f3 David Howells 2020-02-06 527 * should be all zeros on the server and can just be fabricated locally or 076cf3d60a360f3 David Howells 2020-02-06 528 * FSCACHE_READ_FROM_SERVER to indicate that there's no cache or an error 076cf3d60a360f3 David Howells 2020-02-06 529 * occurred and the netfs should just read from the server. 076cf3d60a360f3 David Howells 2020-02-06 530 */ 076cf3d60a360f3 David Howells 2020-02-06 531 static inline 076cf3d60a360f3 David Howells 2020-02-06 532 void fscache_shape_request(struct fscache_cookie *cookie, 076cf3d60a360f3 David Howells 2020-02-06 533 struct fscache_request_shape *shape) 076cf3d60a360f3 David Howells 2020-02-06 534 { 076cf3d60a360f3 David Howells 2020-02-06 535 shape->to_be_done = FSCACHE_READ_FROM_SERVER; 076cf3d60a360f3 David Howells 2020-02-06 536 shape->granularity = 1; 076cf3d60a360f3 David Howells 2020-02-06 537 shape->dio_block_size = 1; 076cf3d60a360f3 David Howells 2020-02-06 538 shape->actual_nr_pages = shape->proposed_nr_pages; 076cf3d60a360f3 David Howells 2020-02-06 539 shape->actual_start = shape->proposed_start; 076cf3d60a360f3 David Howells 2020-02-06 540 076cf3d60a360f3 David Howells 2020-02-06 541 if (fscache_cookie_valid(cookie)) 076cf3d60a360f3 David Howells 2020-02-06 @542 __fscache_shape_request(cookie, shape); 076cf3d60a360f3 David Howells 2020-02-06 543 else if (((loff_t)shape->proposed_start << PAGE_SHIFT) >= shape->i_size) 076cf3d60a360f3 David Howells 2020-02-06 544 shape->to_be_done = FSCACHE_FILL_WITH_ZERO; 076cf3d60a360f3 David Howells 2020-02-06 545 } 076cf3d60a360f3 David Howells 2020-02-06 546 076cf3d60a360f3 David Howells 2020-02-06 547 /** 076cf3d60a360f3 David Howells 2020-02-06 548 * fscache_read - Read data from the cache. 076cf3d60a360f3 David Howells 2020-02-06 549 * @req: The I/O request descriptor 076cf3d60a360f3 David Howells 2020-02-06 550 * @iter: The buffer to read into 076cf3d60a360f3 David Howells 2020-02-06 551 * 076cf3d60a360f3 David Howells 2020-02-06 552 * The cache will attempt to read from the object referred to by the cookie, 076cf3d60a360f3 David Howells 2020-02-06 553 * using the size and position described in the request. The data will be 076cf3d60a360f3 David Howells 2020-02-06 554 * transferred to the buffer described by the iterator specified in the request. 076cf3d60a360f3 David Howells 2020-02-06 555 * 076cf3d60a360f3 David Howells 2020-02-06 556 * If this fails or can't be done, an error will be set in the request 076cf3d60a360f3 David Howells 2020-02-06 557 * descriptor and the netfs must reissue the read to the server. 076cf3d60a360f3 David Howells 2020-02-06 558 * 076cf3d60a360f3 David Howells 2020-02-06 559 * Note that the length and position of the request should be aligned to the DIO 076cf3d60a360f3 David Howells 2020-02-06 560 * block size returned by fscache_shape_request(). 076cf3d60a360f3 David Howells 2020-02-06 561 * 076cf3d60a360f3 David Howells 2020-02-06 562 * If req->done is set, the request will be submitted as asynchronous I/O and 076cf3d60a360f3 David Howells 2020-02-06 563 * -EIOCBQUEUED may be returned to indicate that the operation is in progress. 076cf3d60a360f3 David Howells 2020-02-06 564 * The done function will be called when the operation is concluded either way. 076cf3d60a360f3 David Howells 2020-02-06 565 * 076cf3d60a360f3 David Howells 2020-02-06 566 * If req->done is not set, the request will be submitted as synchronous I/O and 076cf3d60a360f3 David Howells 2020-02-06 567 * will be completed before the function returns. 076cf3d60a360f3 David Howells 2020-02-06 568 */ 076cf3d60a360f3 David Howells 2020-02-06 569 static inline 076cf3d60a360f3 David Howells 2020-02-06 570 int fscache_read(struct fscache_io_request *req, struct iov_iter *iter) 076cf3d60a360f3 David Howells 2020-02-06 571 { 076cf3d60a360f3 David Howells 2020-02-06 572 if (fscache_cookie_valid(req->cookie)) 076cf3d60a360f3 David Howells 2020-02-06 @573 return __fscache_read(req, iter); 076cf3d60a360f3 David Howells 2020-02-06 574 req->error = -ENODATA; 076cf3d60a360f3 David Howells 2020-02-06 575 if (req->io_done) 076cf3d60a360f3 David Howells 2020-02-06 576 req->io_done(req); 076cf3d60a360f3 David Howells 2020-02-06 577 return -ENODATA; 076cf3d60a360f3 David Howells 2020-02-06 578 } 076cf3d60a360f3 David Howells 2020-02-06 579 076cf3d60a360f3 David Howells 2020-02-06 580 076cf3d60a360f3 David Howells 2020-02-06 581 /** 076cf3d60a360f3 David Howells 2020-02-06 582 * fscache_write - Write data to the cache. 076cf3d60a360f3 David Howells 2020-02-06 583 * @req: The I/O request description 076cf3d60a360f3 David Howells 2020-02-06 584 * @iter: The data to write 076cf3d60a360f3 David Howells 2020-02-06 585 * 076cf3d60a360f3 David Howells 2020-02-06 586 * The cache will attempt to write to the object referred to by the cookie, 076cf3d60a360f3 David Howells 2020-02-06 587 * using the size and position described in the request. The data will be 076cf3d60a360f3 David Howells 2020-02-06 588 * transferred from the iterator specified in the request. 076cf3d60a360f3 David Howells 2020-02-06 589 * 076cf3d60a360f3 David Howells 2020-02-06 590 * If this fails or can't be done, an error will be set in the request 076cf3d60a360f3 David Howells 2020-02-06 591 * descriptor. 076cf3d60a360f3 David Howells 2020-02-06 592 * 076cf3d60a360f3 David Howells 2020-02-06 593 * Note that the length and position of the request should be aligned to the DIO 076cf3d60a360f3 David Howells 2020-02-06 594 * block size returned by fscache_shape_request(). 076cf3d60a360f3 David Howells 2020-02-06 595 * 076cf3d60a360f3 David Howells 2020-02-06 596 * If req->io_done is set, the request will be submitted as asynchronous I/O and 076cf3d60a360f3 David Howells 2020-02-06 597 * -EIOCBQUEUED may be returned to indicate that the operation is in progress. 076cf3d60a360f3 David Howells 2020-02-06 598 * The done function will be called when the operation is concluded either way. 076cf3d60a360f3 David Howells 2020-02-06 599 * 076cf3d60a360f3 David Howells 2020-02-06 600 * If req->io_done is not set, the request will be submitted as synchronous I/O and 076cf3d60a360f3 David Howells 2020-02-06 601 * will be completed before the function returns. 076cf3d60a360f3 David Howells 2020-02-06 602 */ 076cf3d60a360f3 David Howells 2020-02-06 603 static inline 076cf3d60a360f3 David Howells 2020-02-06 604 int fscache_write(struct fscache_io_request *req, struct iov_iter *iter) 076cf3d60a360f3 David Howells 2020-02-06 605 { 076cf3d60a360f3 David Howells 2020-02-06 606 if (fscache_cookie_valid(req->cookie)) 076cf3d60a360f3 David Howells 2020-02-06 @607 return __fscache_write(req, iter); 076cf3d60a360f3 David Howells 2020-02-06 608 req->error = -ENOBUFS; 076cf3d60a360f3 David Howells 2020-02-06 609 if (req->io_done) 076cf3d60a360f3 David Howells 2020-02-06 610 req->io_done(req); 076cf3d60a360f3 David Howells 2020-02-06 611 return -ENOBUFS; 076cf3d60a360f3 David Howells 2020-02-06 612 } 076cf3d60a360f3 David Howells 2020-02-06 613 :::::: The code at line 607 was first introduced by commit :::::: 076cf3d60a360f3b1faa84626b1ad93a6db4709f fscache: Rewrite the I/O API based on iov_iter :::::: TO: David Howells <dhowells(a)redhat.com&gt; :::::: CC: David Howells <dhowells(a)redhat.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org