tree: git://git.infradead.org/users/hch/block.git delete-write-same.5 head: e6a05a99f46ef909822031d28dfbcd1a7c9cfb56 commit: 4eeaaa4ec1e82312848c5bc48584de3247743df6 [7/8] block: remove REQ_OP_WRITE_SAME support config: hexagon-randconfig-r045-20220113 (https://download.01.org/0day-ci/archive/20220115/202201150229.DHF8ezE1-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 82c8aca93488730ce8f66101e0f3538f14b551dd) 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 remote add hch-block git://git.infradead.org/users/hch/block.git git fetch --no-tags hch-block delete-write-same.5 git checkout 4eeaaa4ec1e82312848c5bc48584de3247743df6 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/block/ 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 >>): blk_queue_max_write_zeroes_sectors(q, max_discard_sectors); ^ drivers/block/loop.c:789:3: error: implicit declaration of function 'blk_queue_max_write_zeroes_sectors' [-Werror,-Wimplicit-function-declaration] blk_queue_max_write_zeroes_sectors(q, 0); ^ 2 errors generated. -- blk_queue_max_write_zeroes_sectors(q, v ? v : UINT_MAX); ^ 1 error generated. -- blk_queue_max_write_zeroes_sectors(q, objset_bytes >> SECTOR_SHIFT); ^ 1 error generated. -- blk_queue_max_write_zeroes_sectors(zram->disk->queue, UINT_MAX); ^ 1 error generated. vim +/blk_queue_max_write_zeroes_sectors +784 drivers/block/loop.c ee86273062cbb3 Milan Broz 2010-08-23 746 dfaa2ef68e80c3 Lukas Czerner 2011-08-19 747 static void loop_config_discard(struct loop_device *lo) dfaa2ef68e80c3 Lukas Czerner 2011-08-19 748 { dfaa2ef68e80c3 Lukas Czerner 2011-08-19 749 struct file *file = lo->lo_backing_file; dfaa2ef68e80c3 Lukas Czerner 2011-08-19 750 struct inode *inode = file->f_mapping->host; dfaa2ef68e80c3 Lukas Czerner 2011-08-19 751 struct request_queue *q = lo->lo_queue; bcb21c8cc99472 Ming Lei 2020-08-17 752 u32 granularity, max_discard_sectors; dfaa2ef68e80c3 Lukas Czerner 2011-08-19 753 c52abf563049e7 Evan Green 2020-04-03 754 /* c52abf563049e7 Evan Green 2020-04-03 755 * If the backing device is a block device, mirror its zeroing c52abf563049e7 Evan Green 2020-04-03 756 * capability. Set the discard sectors to the block device's zeroing c52abf563049e7 Evan Green 2020-04-03 757 * capabilities because loop discards result in blkdev_issue_zeroout(), c52abf563049e7 Evan Green 2020-04-03 758 * not blkdev_issue_discard(). This maintains consistent behavior with c52abf563049e7 Evan Green 2020-04-03 759 * file-backed loop devices: discarded regions read back as zero. c52abf563049e7 Evan Green 2020-04-03 760 */ 47e9624616c80c Christoph Hellwig 2021-10-19 761 if (S_ISBLK(inode->i_mode)) { 4e7b5671c6a883 Christoph Hellwig 2020-11-23 762 struct request_queue *backingq = bdev_get_queue(I_BDEV(inode)); c52abf563049e7 Evan Green 2020-04-03 763 bcb21c8cc99472 Ming Lei 2020-08-17 764 max_discard_sectors = backingq->limits.max_write_zeroes_sectors; bcb21c8cc99472 Ming Lei 2020-08-17 765 granularity = backingq->limits.discard_granularity ?: bcb21c8cc99472 Ming Lei 2020-08-17 766 queue_physical_block_size(backingq); c52abf563049e7 Evan Green 2020-04-03 767 dfaa2ef68e80c3 Lukas Czerner 2011-08-19 768 /* dfaa2ef68e80c3 Lukas Czerner 2011-08-19 769 * We use punch hole to reclaim the free space used by the 47e9624616c80c Christoph Hellwig 2021-10-19 770 * image a.k.a. discard. dfaa2ef68e80c3 Lukas Czerner 2011-08-19 771 */ 47e9624616c80c Christoph Hellwig 2021-10-19 772 } else if (!file->f_op->fallocate) { bcb21c8cc99472 Ming Lei 2020-08-17 773 max_discard_sectors = 0; bcb21c8cc99472 Ming Lei 2020-08-17 774 granularity = 0; dfaa2ef68e80c3 Lukas Czerner 2011-08-19 775 c52abf563049e7 Evan Green 2020-04-03 776 } else { bcb21c8cc99472 Ming Lei 2020-08-17 777 max_discard_sectors = UINT_MAX >> 9; bcb21c8cc99472 Ming Lei 2020-08-17 778 granularity = inode->i_sb->s_blocksize; c52abf563049e7 Evan Green 2020-04-03 779 } c52abf563049e7 Evan Green 2020-04-03 780 bcb21c8cc99472 Ming Lei 2020-08-17 781 if (max_discard_sectors) { bcb21c8cc99472 Ming Lei 2020-08-17 782 q->limits.discard_granularity = granularity; bcb21c8cc99472 Ming Lei 2020-08-17 783 blk_queue_max_discard_sectors(q, max_discard_sectors); bcb21c8cc99472 Ming Lei 2020-08-17 @784 blk_queue_max_write_zeroes_sectors(q, max_discard_sectors); 8b904b5b6b58b9 Bart Van Assche 2018-03-07 785 blk_queue_flag_set(QUEUE_FLAG_DISCARD, q); bcb21c8cc99472 Ming Lei 2020-08-17 786 } else { bcb21c8cc99472 Ming Lei 2020-08-17 787 q->limits.discard_granularity = 0; bcb21c8cc99472 Ming Lei 2020-08-17 788 blk_queue_max_discard_sectors(q, 0); bcb21c8cc99472 Ming Lei 2020-08-17 789 blk_queue_max_write_zeroes_sectors(q, 0); c52abf563049e7 Evan Green 2020-04-03 790 blk_queue_flag_clear(QUEUE_FLAG_DISCARD, q); dfaa2ef68e80c3 Lukas Czerner 2011-08-19 791 } bcb21c8cc99472 Ming Lei 2020-08-17 792 q->limits.discard_alignment = 0; bcb21c8cc99472 Ming Lei 2020-08-17 793 } dfaa2ef68e80c3 Lukas Czerner 2011-08-19 794 :::::: The code at line 784 was first introduced by commit :::::: bcb21c8cc9947286211327d663ace69f07d37a76 block: loop: set discard granularity and alignment for block device backed loop :::::: TO: Ming Lei <ming.lei(a)redhat.com&gt; :::::: CC: Jens Axboe <axboe(a)kernel.dk&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org