Hi Changheun, Thank you for the patch! Yet something to improve: [auto build test ERROR on block/for-next] [also build test ERROR on linux/master linus/master v5.11-rc4 next-20210120] [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/Changheun-Lee/bio-limit-bio-max-size/20210121-092618 base: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next config: ia64-randconfig-s032-20210121 (attached as .config) compiler: ia64-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-208-g46a52ca4-dirty # https://github.com/0day-ci/linux/commit/3b3676565e975655879c64b22c674166d5c7ff1c git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Changheun-Lee/bio-limit-bio-max-size/20210121-092618 git checkout 3b3676565e975655879c64b22c674166d5c7ff1c # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=ia64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All error/warnings (new ones prefixed by >>): block/bio.c: In function '__bio_try_merge_page': >> block/bio.c:895:4: warning: this 'if' clause does not guard... [-Wmisleading-indentation] 895 | if (bio->bi_iter.bi_size > bio->bi_max_size - len) | ^~ block/bio.c:897:5: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if' 897 | return false; | ^~~~~~ block/bio.c: At top level: >> block/bio.c:904:2: error: expected identifier or '(' before 'return' 904 | return false; | ^~~~~~ >> block/bio.c:905:1: error: expected identifier or '(' before '}' token 905 | } | ^ block/bio.c: In function '__bio_try_merge_page': block/bio.c:903:2: error: control reaches end of non-void function [-Werror=return-type] 903 | } | ^ cc1: some warnings being treated as errors vim +904 block/bio.c ^1da177e4c3f4152 fs/bio.c Linus Torvalds 2005-04-16 868 6e68af666f533625 fs/bio.c Mike Christie 2005-11-11 869 /** 0aa69fd32a5f766e block/bio.c Christoph Hellwig 2018-06-01 870 * __bio_try_merge_page - try appending data to an existing bvec. 6e68af666f533625 fs/bio.c Mike Christie 2005-11-11 871 * @bio: destination bio 551879a48f01826f block/bio.c Ming Lei 2019-04-23 872 * @page: start page to add 0aa69fd32a5f766e block/bio.c Christoph Hellwig 2018-06-01 873 * @len: length of the data to add 551879a48f01826f block/bio.c Ming Lei 2019-04-23 874 * @off: offset of the data relative to @page ff896738be381efa block/bio.c Christoph Hellwig 2019-06-17 875 * @same_page: return if the segment has been merged inside the same page 6e68af666f533625 fs/bio.c Mike Christie 2005-11-11 876 * 0aa69fd32a5f766e block/bio.c Christoph Hellwig 2018-06-01 877 * Try to add the data at @page + @off to the last bvec of @bio. This is a 3cf148891799d465 block/bio.c Randy Dunlap 2020-07-30 878 * useful optimisation for file systems with a block size smaller than the 0aa69fd32a5f766e block/bio.c Christoph Hellwig 2018-06-01 879 * page size. 0aa69fd32a5f766e block/bio.c Christoph Hellwig 2018-06-01 880 * 551879a48f01826f block/bio.c Ming Lei 2019-04-23 881 * Warn if (@len, @off) crosses pages in case that @same_page is true. 551879a48f01826f block/bio.c Ming Lei 2019-04-23 882 * 0aa69fd32a5f766e block/bio.c Christoph Hellwig 2018-06-01 883 * Return %true on success or %false on failure. 6e68af666f533625 fs/bio.c Mike Christie 2005-11-11 884 */ 0aa69fd32a5f766e block/bio.c Christoph Hellwig 2018-06-01 885 bool __bio_try_merge_page(struct bio *bio, struct page *page, ff896738be381efa block/bio.c Christoph Hellwig 2019-06-17 886 unsigned int len, unsigned int off, bool *same_page) 6e68af666f533625 fs/bio.c Mike Christie 2005-11-11 887 { c66a14d07c136cc3 block/bio.c Kent Overstreet 2013-11-23 888 if (WARN_ON_ONCE(bio_flagged(bio, BIO_CLONED))) 0aa69fd32a5f766e block/bio.c Christoph Hellwig 2018-06-01 889 return false; 762380ad9322951c block/bio.c Jens Axboe 2014-06-05 890 cc90bc68422318eb block/bio.c Andreas Gruenbacher 2019-12-09 891 if (bio->bi_vcnt > 0) { 0aa69fd32a5f766e block/bio.c Christoph Hellwig 2018-06-01 892 struct bio_vec *bv = &bio->bi_io_vec[bio->bi_vcnt - 1]; c66a14d07c136cc3 block/bio.c Kent Overstreet 2013-11-23 893 5919482e222908d4 block/bio.c Ming Lei 2019-03-17 894 if (page_is_mergeable(bv, page, len, off, same_page)) { 3b3676565e975655 block/bio.c Changheun Lee 2021-01-21 @895 if (bio->bi_iter.bi_size > bio->bi_max_size - len) 2cd896a5e86fc326 block/bio.c Ritesh Harjani 2020-09-09 896 *same_page = false; cc90bc68422318eb block/bio.c Andreas Gruenbacher 2019-12-09 897 return false; 2cd896a5e86fc326 block/bio.c Ritesh Harjani 2020-09-09 898 } c66a14d07c136cc3 block/bio.c Kent Overstreet 2013-11-23 899 bv->bv_len += len; 0aa69fd32a5f766e block/bio.c Christoph Hellwig 2018-06-01 900 bio->bi_iter.bi_size += len; 0aa69fd32a5f766e block/bio.c Christoph Hellwig 2018-06-01 901 return true; 0aa69fd32a5f766e block/bio.c Christoph Hellwig 2018-06-01 902 } 5919482e222908d4 block/bio.c Ming Lei 2019-03-17 903 } 0aa69fd32a5f766e block/bio.c Christoph Hellwig 2018-06-01 @904 return false; c66a14d07c136cc3 block/bio.c Kent Overstreet 2013-11-23 @905 } 0aa69fd32a5f766e block/bio.c Christoph Hellwig 2018-06-01 906 EXPORT_SYMBOL_GPL(__bio_try_merge_page); c66a14d07c136cc3 block/bio.c Kent Overstreet 2013-11-23 907 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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