tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: dfd42facf1e4ada021b939b4e19c935dcdd55566 commit: 770b1d216d7371c94c88713824da4be4bc39a4e0 md/raid5: play nice with PREEMPT_RT date: 5 weeks ago config: x86_64-rhel-8.3-kselftests (https://download.01.org/0day-ci/archive/20220207/202202072158.7y7wxNRC-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # 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 770b1d216d7371c94c88713824da4be4bc39a4e0 # save the config file to linux build tree mkdir build_dir make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 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 >>) drivers/md/raid5.c: note: in included file: drivers/md/raid5.h:271:14: sparse: sparse: array of flexible structures drivers/md/raid5.c:641:40: sparse: sparse: incompatible types in comparison expression (different address spaces): drivers/md/raid5.c:641:40: sparse: struct md_rdev [noderef] __rcu * drivers/md/raid5.c:641:40: sparse: struct md_rdev * drivers/md/raid5.c:643:32: sparse: sparse: incompatible types in comparison expression (different address spaces): drivers/md/raid5.c:643:32: sparse: struct md_rdev [noderef] __rcu * drivers/md/raid5.c:643:32: sparse: struct md_rdev * drivers/md/raid5.c:667:40: sparse: sparse: incompatible types in comparison expression (different address spaces): drivers/md/raid5.c:667:40: sparse: struct md_rdev [noderef] __rcu * drivers/md/raid5.c:667:40: sparse: struct md_rdev * drivers/md/raid5.c:669:32: sparse: sparse: incompatible types in comparison expression (different address spaces): drivers/md/raid5.c:669:32: sparse: struct md_rdev [noderef] __rcu * drivers/md/raid5.c:669:32: sparse: struct md_rdev * drivers/md/raid5.c:1101:25: sparse: sparse: incompatible types in comparison expression (different address spaces): drivers/md/raid5.c:1101:25: sparse: struct md_rdev [noderef] __rcu * drivers/md/raid5.c:1101:25: sparse: struct md_rdev * drivers/md/raid5.c:1103:24: sparse: sparse: incompatible types in comparison expression (different address spaces): drivers/md/raid5.c:1103:24: sparse: struct md_rdev [noderef] __rcu * drivers/md/raid5.c:1103:24: sparse: struct md_rdev * drivers/md/raid5.c:3563:32: sparse: sparse: incompatible types in comparison expression (different address spaces): drivers/md/raid5.c:3563:32: sparse: struct md_rdev [noderef] __rcu * drivers/md/raid5.c:3563:32: sparse: struct md_rdev * drivers/md/raid5.c:3689:48: sparse: sparse: incompatible types in comparison expression (different address spaces): drivers/md/raid5.c:3689:48: sparse: struct md_rdev [noderef] __rcu * drivers/md/raid5.c:3689:48: sparse: struct md_rdev * drivers/md/raid5.c:3696:32: sparse: sparse: incompatible types in comparison expression (different address spaces): drivers/md/raid5.c:3696:32: sparse: struct md_rdev [noderef] __rcu * drivers/md/raid5.c:3696:32: sparse: struct md_rdev * drivers/md/raid5.c:3718:16: sparse: sparse: incompatible types in comparison expression (different address spaces): drivers/md/raid5.c:3718:16: sparse: struct md_rdev [noderef] __rcu * drivers/md/raid5.c:3718:16: sparse: struct md_rdev * drivers/md/raid5.c:4646:24: sparse: sparse: incompatible types in comparison expression (different address spaces): drivers/md/raid5.c:4646:24: sparse: struct md_rdev [noderef] __rcu * drivers/md/raid5.c:4646:24: sparse: struct md_rdev * drivers/md/raid5.c:4657:32: sparse: sparse: incompatible types in comparison expression (different address spaces): drivers/md/raid5.c:4657:32: sparse: struct md_rdev [noderef] __rcu * drivers/md/raid5.c:4657:32: sparse: struct md_rdev * drivers/md/raid5.c:4704:49: sparse: sparse: incompatible types in comparison expression (different address spaces): drivers/md/raid5.c:4704:49: sparse: struct md_rdev [noderef] __rcu * drivers/md/raid5.c:4704:49: sparse: struct md_rdev * drivers/md/raid5.c:4717:49: sparse: sparse: incompatible types in comparison expression (different address spaces): drivers/md/raid5.c:4717:49: sparse: struct md_rdev [noderef] __rcu * drivers/md/raid5.c:4717:49: sparse: struct md_rdev * drivers/md/raid5.c:4726:49: sparse: sparse: incompatible types in comparison expression (different address spaces): drivers/md/raid5.c:4726:49: sparse: struct md_rdev [noderef] __rcu * drivers/md/raid5.c:4726:49: sparse: struct md_rdev * drivers/md/raid5.c:4748:40: sparse: sparse: incompatible types in comparison expression (different address spaces): drivers/md/raid5.c:4748:40: sparse: struct md_rdev [noderef] __rcu * drivers/md/raid5.c:4748:40: sparse: struct md_rdev * drivers/md/raid5.c:5419:16: sparse: sparse: incompatible types in comparison expression (different address spaces): drivers/md/raid5.c:5419:16: sparse: struct md_rdev [noderef] __rcu * drivers/md/raid5.c:5419:16: sparse: struct md_rdev * drivers/md/raid5.c:5422:24: sparse: sparse: incompatible types in comparison expression (different address spaces): drivers/md/raid5.c:5422:24: sparse: struct md_rdev [noderef] __rcu * drivers/md/raid5.c:5422:24: sparse: struct md_rdev * drivers/md/raid5.c:7055:9: sparse: expected struct lockdep_map *lock drivers/md/raid5.c:7055:9: sparse: got struct lockdep_map [noderef] __percpu * drivers/md/raid5.c:7055:9: sparse: expected struct local_lock_t [usertype] *l drivers/md/raid5.c:7055:9: sparse: got struct local_lock_t [noderef] __percpu * drivers/md/raid5.c:7808:40: sparse: sparse: incompatible types in comparison expression (different address spaces): drivers/md/raid5.c:7808:40: sparse: struct md_rdev [noderef] __rcu * drivers/md/raid5.c:7808:40: sparse: struct md_rdev * drivers/md/raid5.c:8021:25: sparse: sparse: incompatible types in comparison expression (different address spaces): drivers/md/raid5.c:8021:25: sparse: struct md_rdev [noderef] __rcu * drivers/md/raid5.c:8021:25: sparse: struct md_rdev * drivers/md/raid5.c:8037:25: sparse: sparse: incompatible types in comparison expression (different address spaces): drivers/md/raid5.c:8037:25: sparse: struct md_rdev [noderef] __rcu * drivers/md/raid5.c:8037:25: sparse: struct md_rdev * drivers/md/raid5.c:1476:16: sparse: sparse: dereference of noderef expression drivers/md/raid5.c:1476:39: sparse: sparse: dereference of noderef expression drivers/md/raid5.c:2208:54: sparse: sparse: dereference of noderef expression drivers/md/raid5.c:2419:16: sparse: sparse: dereference of noderef expression drivers/md/raid5.c:2421:9: sparse: sparse: dereference of noderef expression drivers/md/raid5.c:2422:9: sparse: sparse: dereference of noderef expression drivers/md/raid5.c:7031:23: sparse: sparse: dereference of noderef expression drivers/md/raid5.c:7031:23: sparse: sparse: dereference of noderef expression drivers/md/raid5.c:7032:9: sparse: sparse: dereference of noderef expression drivers/md/raid5.c:7033:16: sparse: sparse: dereference of noderef expression drivers/md/raid5.c:7034:9: sparse: sparse: dereference of noderef expression drivers/md/raid5.c:7039:34: sparse: sparse: dereference of noderef expression drivers/md/raid5.c:7040:17: sparse: sparse: dereference of noderef expression drivers/md/raid5.c:7041:22: sparse: sparse: dereference of noderef expression drivers/md/raid5.c:97:9: sparse: sparse: context imbalance in 'raid5_quiesce' - different lock contexts for basic block vim +/__percpu +7055 drivers/md/raid5.c 7036 7037 static int alloc_scratch_buffer(struct r5conf *conf, struct raid5_percpu *percpu) 7038 { 7039 if (conf->level == 6 && !percpu->spare_page) { 7040 percpu->spare_page = alloc_page(GFP_KERNEL); 7041 if (!percpu->spare_page) 7042 return -ENOMEM; 7043 } 7044 7045 if (scribble_alloc(percpu, 7046 max(conf->raid_disks, 7047 conf->previous_raid_disks), 7048 max(conf->chunk_sectors, 7049 conf->prev_chunk_sectors) 7050 / RAID5_STRIPE_SECTORS(conf))) { 7051 free_scratch_buffer(conf, percpu); 7052 return -ENOMEM; 7053 } 7054 7056 return 0; 7057 } 7058 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org