tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: a08b41ab9e2e468647f78eb17c28e29b93006394 commit: 4054cff92c357813b6861b622122b344990f7e31 block: remove blk-exec.c date: 8 weeks ago config: csky-randconfig-s032-20220120 (https://download.01.org/0day-ci/archive/20220126/202201260028.1emkcjHZ-lk...) compiler: csky-linux-gcc (GCC) 11.2.0 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: v0.6.4-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 4054cff92c357813b6861b622122b344990f7e31 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=csky SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) vim +1071 block/blk-mq.c 1061 1062 /** 1063 * blk_end_sync_rq - executes a completion event on a request 1064 * @rq: request to complete 1065 * @error: end I/O status of the request 1066 */ 1067 static void blk_end_sync_rq(struct request *rq, blk_status_t error) 1068 { 1069 struct completion *waiting = rq->end_io_data; 1070 1072 1073 /* 1074 * complete last, if this is a stack request the process (and thus 1075 * the rq pointer) could be invalid right after this complete() 1076 */ 1077 complete(waiting); 1078 } 1079 1080 /** 1081 * blk_execute_rq_nowait - insert a request to I/O scheduler for execution 1082 * @bd_disk: matching gendisk 1083 * @rq: request to insert 1084 * @at_head: insert request at head or tail of queue 1085 * @done: I/O completion handler 1086 * 1087 * Description: 1088 * Insert a fully prepared request at the back of the I/O scheduler queue 1089 * for execution. Don't wait for completion. 1090 * 1091 * Note: 1092 * This function will invoke @done directly if the queue is dead. 1093 */ 1094 void blk_execute_rq_nowait(struct gendisk *bd_disk, struct request *rq, 1095 int at_head, rq_end_io_fn *done) 1096 { 1097 WARN_ON(irqs_disabled()); 1098 WARN_ON(!blk_rq_is_passthrough(rq)); 1099 1100 rq->rq_disk = bd_disk; 1101 rq->end_io = done; 1102 1103 blk_account_io_start(rq); 1104 1105 /* 1106 * don't check dying flag for MQ because the request won't 1107 * be reused after dying flag is set 1108 */ 1109 blk_mq_sched_insert_request(rq, at_head, true, false); 1110 } 1111 EXPORT_SYMBOL_GPL(blk_execute_rq_nowait); 1112 1113 static bool blk_rq_is_poll(struct request *rq) 1114 { 1115 if (!rq->mq_hctx) 1116 return false; 1117 if (rq->mq_hctx->type != HCTX_TYPE_POLL) 1118 return false; 1119 if (WARN_ON_ONCE(!rq->bio)) 1120 return false; 1121 return true; 1122 } 1123 1124 static void blk_rq_poll_completion(struct request *rq, struct completion *wait) 1125 { 1126 do { 1127 bio_poll(rq->bio, NULL, 0); 1128 cond_resched(); 1129 } while (!completion_done(wait)); 1130 } 1131 1132 /** 1133 * blk_execute_rq - insert a request into queue for execution 1134 * @bd_disk: matching gendisk 1135 * @rq: request to insert 1136 * @at_head: insert request at head or tail of queue 1137 * 1138 * Description: 1139 * Insert a fully prepared request at the back of the I/O scheduler queue 1140 * for execution and wait for completion. 1141 * Return: The blk_status_t result provided to blk_mq_end_request(). 1142 */ 1143 blk_status_t blk_execute_rq(struct gendisk *bd_disk, struct request *rq, 1144 int at_head) 1145 { 1146 DECLARE_COMPLETION_ONSTACK(wait); 1147 unsigned long hang_check; 1148 1149 rq->end_io_data = &wait; 1150 blk_execute_rq_nowait(bd_disk, rq, at_head, blk_end_sync_rq); 1151 1152 /* Prevent hang_check timer from firing at us during very long I/O */ 1153 hang_check = sysctl_hung_task_timeout_secs; 1154 1155 if (blk_rq_is_poll(rq)) 1156 blk_rq_poll_completion(rq, &wait); 1157 else if (hang_check) 1158 while (!wait_for_completion_io_timeout(&wait, 1159 hang_check * (HZ/2))) 1160 ; 1161 else 1162 wait_for_completion_io(&wait); 1163 1165 } 1166 EXPORT_SYMBOL(blk_execute_rq); 1167 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org