tree: https://git.kernel.org/pub/scm/linux/kernel/git/colyli/linux-bcache.git zoned head: 9560b14e9901073c5fca5e5e6c531dbd950b2b04 commit: 366b493dd533a7de96f719c30d452ea745233836 [2/3] bcache: handle zone management bios for bcache device config: x86_64-randconfig-a013-20200521 (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 3393cc4cebf9969db94dc424b7a2b6195589c33b) 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 # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu git checkout 366b493dd533a7de96f719c30d452ea745233836 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>, old ones prefixed by <<): ret = bch_keylist_realloc(&iop->insert_keys, free_keys, iop->c); ^~~~~~~~~ drivers/md/bcache/request.c:1065:25: note: initialize the variable 'free_keys' to silence this warning int max_keys, free_keys; ^ = 0 nr_zones = s->d->disk->queue->nr_zones; ~~~~~~~~~~~~~~~~~ ^ drivers/md/bcache/request.c:1422:9: error: implicit declaration of function 'blkdev_report_zones' [-Werror,-Wimplicit-function-declaration] return blkdev_report_zones(dc->bdev, ^ drivers/md/bcache/request.c:1422:9: note: did you mean 'blkdev_nr_zones'? include/linux/blkdev.h:373:28: note: 'blkdev_nr_zones' declared here static inline unsigned int blkdev_nr_zones(struct gendisk *disk) ^ 1 warning and 2 errors generated. vim +1134 drivers/md/bcache/request.c 1054 1055 /* 1056 * Invalidate the LBA range on cache device which is covered by the 1057 * the resetting zones. 1058 */ 1059 static int bch_data_invalidate_zones(struct closure *cl, 1060 size_t zone_sector, 1061 size_t nr_zones) 1062 { 1063 struct search *s = container_of(cl, struct search, cl); 1064 struct data_insert_op *iop = &s->iop; 1065 int max_keys, free_keys; 1066 size_t start = zone_sector; 1067 int ret; 1068 1069 max_keys = (block_bytes(iop->c) - sizeof(struct jset)) / 1070 sizeof(uint64_t); 1071 bch_keylist_init(&iop->insert_keys); 1073 if (ret < 0) 1074 return -ENOMEM; 1075 1076 while (nr_zones-- > 0) { 1077 atomic_t *journal_ref = NULL; 1078 size_t size = s->d->disk->queue->limits.chunk_sectors; 1079 more_keys: 1080 bch_keylist_reset(&iop->insert_keys); 1081 free_keys = max_keys; 1082 1083 while (size > 0 && free_keys >= 2) { 1084 size_t sectors = min_t(size_t, size, 1085 1U << (KEY_SIZE_BITS - 1)); 1086 1087 bch_keylist_add(&iop->insert_keys, 1088 &KEY(iop->inode, start, sectors)); 1089 start += sectors; 1090 size -= sectors; 1091 free_keys -= 2; 1092 } 1093 1094 /* Insert invalidate keys into btree */ 1095 journal_ref = bch_journal(iop->c, &iop->insert_keys, NULL); 1096 if (!journal_ref) { 1097 ret = -EIO; 1098 break; 1099 } 1100 1101 ret = bch_btree_insert(iop->c, 1102 &iop->insert_keys, journal_ref, NULL); 1103 atomic_dec_bug(journal_ref); 1104 if (ret < 0) 1105 break; 1106 1107 if (size) 1108 goto more_keys; 1109 } 1110 1111 bch_keylist_free(&iop->insert_keys); 1112 1113 return ret; 1114 } 1115 1116 static void cached_dev_nodata(struct closure *cl) 1117 { 1118 struct search *s = container_of(cl, struct search, cl); 1119 struct bio *bio = &s->bio.bio; 1120 int nr_zones = 1; 1121 1122 if (s->iop.flush_journal) 1123 bch_journal_meta(s->iop.c, cl); 1124 1125 if (bio_op(bio) == REQ_OP_ZONE_RESET_ALL || 1126 bio_op(bio) == REQ_OP_ZONE_RESET) { 1127 int err = 0; 1128 /* 1129 * If this is REQ_OP_ZONE_RESET_ALL bio, cached data 1130 * covered by all zones should be invalidate from the 1131 * cache device. 1132 */ 1133 if (bio_op(bio) == REQ_OP_ZONE_RESET_ALL) 1135 1136 err = bch_data_invalidate_zones( 1137 cl, bio->bi_iter.bi_sector, nr_zones); 1138 1139 if (err < 0) { 1140 s->iop.status = errno_to_blk_status(err); 1141 /* debug, should be removed before post patch */ 1142 bio->bi_status = BLK_STS_TIMEOUT; 1143 /* set by bio_cnt_set() in do_bio_hook() */ 1144 bio_put(bio); 1145 /* 1146 * Invalidate cached data fails, don't send 1147 * the zone reset bio to backing device and 1148 * return failure. Otherwise potential data 1149 * corruption on bcache device may happen. 1150 */ 1151 goto continue_bio_complete; 1152 } 1153 1154 } 1155 1156 /* 1157 * For flush or zone management bios, of cause 1158 * they should be sent to backing device too. 1159 */ 1160 bio->bi_end_io = backing_request_endio; 1161 closure_bio_submit(s->iop.c, bio, cl); 1162 1163 continue_bio_complete: 1164 continue_at(cl, cached_dev_bio_complete, NULL); 1165 } 1166 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org