CC: kbuild-all(a)lists.01.org TO: Coly Li <colyli(a)suse.de&gt; CC: Jens Axboe <axboe(a)kernel.dk&gt; CC: Hannes Reinecke <hare(a)suse.de&gt; tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 7b287a5c6ac518c415a258f2aa7b1ebb25c263d2 commit: bf6af17065079d29b9bd4e59de27cc2965e6fabf [10807/13035] bcache: handle cache set verify_ondisk properly for bucket size > 8MB :::::: branch date: 3 hours ago :::::: commit date: 5 days ago config: i386-randconfig-m021-20200730 (attached as .config) compiler: gcc-9 (Debian 9.3.0-14) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com&gt; New smatch warnings: drivers/md/bcache/bcache.h:769 meta_bucket_pages() warn: subtract is higher precedence than shift drivers/md/bcache/bcache.h:769 meta_bucket_pages() warn: subtract is higher precedence than shift drivers/md/bcache/bcache.h:769 meta_bucket_pages() warn: subtract is higher precedence than shift Old smatch warnings: drivers/md/bcache/btree.c:641 mca_reap() warn: inconsistent returns 'b->lock'. # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git remote update linux-next git checkout bf6af17065079d29b9bd4e59de27cc2965e6fabf vim +769 drivers/md/bcache/bcache.h cafe563591446c Kent Overstreet 2013-03-23 764 de1fafab649f94 Coly Li 2020-07-25 765 static inline unsigned int meta_bucket_pages(struct cache_sb *sb) de1fafab649f94 Coly Li 2020-07-25 766 { de1fafab649f94 Coly Li 2020-07-25 767 unsigned int n, max_pages; de1fafab649f94 Coly Li 2020-07-25 768 de1fafab649f94 Coly Li 2020-07-25 @769 max_pages = min_t(unsigned int, de1fafab649f94 Coly Li 2020-07-25 770 __rounddown_pow_of_two(USHRT_MAX) / PAGE_SECTORS, de1fafab649f94 Coly Li 2020-07-25 771 MAX_ORDER_NR_PAGES); de1fafab649f94 Coly Li 2020-07-25 772 de1fafab649f94 Coly Li 2020-07-25 773 n = sb->bucket_size / PAGE_SECTORS; de1fafab649f94 Coly Li 2020-07-25 774 if (n > max_pages) de1fafab649f94 Coly Li 2020-07-25 775 n = max_pages; de1fafab649f94 Coly Li 2020-07-25 776 de1fafab649f94 Coly Li 2020-07-25 777 return n; de1fafab649f94 Coly Li 2020-07-25 778 } de1fafab649f94 Coly Li 2020-07-25 779 :::::: The code at line 769 was first introduced by commit :::::: de1fafab649f944d97e45fc043b55a3a5a371744 bcache: introduce meta_bucket_pages() related helper routines :::::: TO: Coly Li <colyli(a)suse.de&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