Hi Pavel, kernel test robot noticed the following build warnings: [auto build test WARNING on axboe-block/for-next] [also build test WARNING on akpm-mm/mm-everything linus/master v6.11-rc6 next-20240905] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Pavel-Begunkov/io_uring-cmd-expose-iowq-to-cmds/20240904-222012 base: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next patch link: https://lore.kernel.org/r/292fa1c611adb064efe16ab741aad65c2128ada8.1725459175.git.asml.silence%40gmail.com patch subject: [PATCH v3 7/8] block: add nowait flag for __blkdev_issue_zero_pages config: i386-randconfig-141-20240906 (https://download.01.org/0day-ci/archive/20240906/202409061126.hKdAymJK-lkp@xxxxxxxxx/config) compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240906/202409061126.hKdAymJK-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202409061126.hKdAymJK-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> block/blk-lib.c:200:12: warning: variable 'opf' set but not used [-Wunused-but-set-variable] 200 | blk_opf_t opf = REQ_OP_WRITE; | ^ 1 warning generated. vim +/opf +200 block/blk-lib.c 195 196 int blkdev_issue_zero_pages_bio(struct block_device *bdev, 197 sector_t sector, sector_t nr_sects, gfp_t gfp_mask, 198 struct bio **biop, unsigned int flags) 199 { > 200 blk_opf_t opf = REQ_OP_WRITE; 201 202 if (flags & BLKDEV_ZERO_PAGES_NOWAIT) { 203 sector_t max_bio_sectors = BIO_MAX_VECS << PAGE_SECTORS_SHIFT; 204 205 if (nr_sects > max_bio_sectors) 206 return -EAGAIN; 207 opf |= REQ_NOWAIT; 208 } 209 210 while (nr_sects) { 211 unsigned int nr_vecs = __blkdev_sectors_to_bio_pages(nr_sects); 212 struct bio *bio; 213 214 bio = bio_alloc(bdev, nr_vecs, REQ_OP_WRITE, gfp_mask); 215 if (!bio) 216 return -ENOMEM; 217 bio->bi_iter.bi_sector = sector; 218 219 if ((flags & BLKDEV_ZERO_KILLABLE) && 220 fatal_signal_pending(current)) 221 return -EINTR; 222 223 do { 224 unsigned int len, added; 225 226 len = min_t(sector_t, 227 PAGE_SIZE, nr_sects << SECTOR_SHIFT); 228 added = bio_add_page(bio, ZERO_PAGE(0), len, 0); 229 if (added < len) 230 break; 231 nr_sects -= added >> SECTOR_SHIFT; 232 sector += added >> SECTOR_SHIFT; 233 } while (nr_sects); 234 235 *biop = bio_chain_and_submit(*biop, bio); 236 cond_resched(); 237 } 238 239 return 0; 240 } 241 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
