Hi SelvaKumar, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on block/for-next] [also build test WARNING on dm/for-next next-20210817] [cannot apply to linus/master linux-nvme/for-next v5.14-rc6] [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] url: https://github.com/0day-ci/linux/commits/SelvaKumar-S/block-make-bio_map_kern-non-static/20210817-193111 base: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next config: hexagon-randconfig-r013-20210816 (attached as .config) compiler: clang version 12.0.0 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 # https://github.com/0day-ci/linux/commit/c307f1051a72122d636502c6885df8b2b25ed697 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review SelvaKumar-S/block-make-bio_map_kern-non-static/20210817-193111 git checkout c307f1051a72122d636502c6885df8b2b25ed697 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=hexagon If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): block/blk-lib.c:197:5: warning: no previous prototype for function 'blk_copy_offload_submit_bio' [-Wmissing-prototypes] int blk_copy_offload_submit_bio(struct block_device *bdev, ^ block/blk-lib.c:197:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int blk_copy_offload_submit_bio(struct block_device *bdev, ^ static block/blk-lib.c:250:5: warning: no previous prototype for function 'blk_copy_offload_scc' [-Wmissing-prototypes] int blk_copy_offload_scc(struct block_device *src_bdev, int nr_srcs, ^ block/blk-lib.c:250:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int blk_copy_offload_scc(struct block_device *src_bdev, int nr_srcs, ^ static >> block/blk-lib.c:336:5: warning: no previous prototype for function 'blk_submit_rw_buf' [-Wmissing-prototypes] int blk_submit_rw_buf(struct block_device *bdev, void *buf, sector_t buf_len, ^ block/blk-lib.c:336:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int blk_submit_rw_buf(struct block_device *bdev, void *buf, sector_t buf_len, ^ static 3 warnings generated. vim +/blk_submit_rw_buf +336 block/blk-lib.c 335 > 336 int blk_submit_rw_buf(struct block_device *bdev, void *buf, sector_t buf_len, 337 sector_t sector, unsigned int op, gfp_t gfp_mask) 338 { 339 struct request_queue *q = bdev_get_queue(bdev); 340 struct bio *bio, *parent = NULL; 341 sector_t max_hw_len = min_t(unsigned int, queue_max_hw_sectors(q), 342 queue_max_segments(q) << (PAGE_SHIFT - SECTOR_SHIFT)); 343 sector_t len, remaining; 344 int ret; 345 346 for (remaining = buf_len; remaining > 0; remaining -= len) { 347 len = min_t(int, max_hw_len, remaining); 348 retry: 349 bio = bio_map_kern(q, buf, len << SECTOR_SHIFT, gfp_mask); 350 if (IS_ERR(bio)) { 351 len >>= 1; 352 if (len) 353 goto retry; 354 return PTR_ERR(bio); 355 } 356 357 bio->bi_iter.bi_sector = sector; 358 bio->bi_opf = op; 359 bio_set_dev(bio, bdev); 360 bio->bi_end_io = NULL; 361 bio->bi_private = NULL; 362 363 if (parent) { 364 bio_chain(parent, bio); 365 submit_bio(parent); 366 } 367 parent = bio; 368 sector += len; 369 } 370 ret = submit_bio_wait(bio); 371 bio_put(bio); 372 373 return ret; 374 } 375 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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