tree: https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-4.19 head: 45baa007ba13bc516470dbd9379b2f7525a087e1 commit: 56b6a5dcf7349d151c47201626e0f1b62334febf [44/59] FROMLIST: sched: Core-wide rq->lock config: x86_64-randconfig-s022-20200615 (attached as .config) compiler: gcc-9 (Debian 9.3.0-13) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.2-rc1-3-g55607964-dirty git checkout 56b6a5dcf7349d151c47201626e0f1b62334febf # save the attached .config to linux build tree make W=1 C=1 ARCH=x86_64 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' 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 >>) kernel/sched/core.c:579:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/core.c:579:9: sparse: struct sched_domain [noderef] <asn:4> * kernel/sched/core.c:579:9: sparse: struct sched_domain * kernel/sched/core.c:1701:17: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/core.c:1701:17: sparse: struct sched_domain [noderef] <asn:4> * kernel/sched/core.c:1701:17: sparse: struct sched_domain * kernel/sched/core.c:1889:27: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/core.c:1889:27: sparse: struct task_struct [noderef] <asn:4> * kernel/sched/core.c:1889:27: sparse: struct task_struct * kernel/sched/core.c:5141:28: sparse: sparse: context imbalance in '__cond_resched_lock' - unexpected unlock kernel/sched/core.c:109:6: warning: no previous prototype for 'sched_core_get' [-Wmissing-prototypes] 109 | void sched_core_get(void) | ^~~~~~~~~~~~~~ kernel/sched/core.c:117:6: warning: no previous prototype for 'sched_core_put' [-Wmissing-prototypes] 117 | void sched_core_put(void) | ^~~~~~~~~~~~~~ kernel/sched/core.c:1642:6: warning: no previous prototype for 'sched_set_stop_task' [-Wmissing-prototypes] 1642 | void sched_set_stop_task(int cpu, struct task_struct *stop) | ^~~~~~~~~~~~~~~~~~~ kernel/sched/core.c:3843:35: warning: no previous prototype for 'preempt_schedule_irq' [-Wmissing-prototypes] 3843 | asmlinkage __visible void __sched preempt_schedule_irq(void) | ^~~~~~~~~~~~~~~~~~~~ kernel/sched/core.c: In function 'sched_init': kernel/sched/core.c:6111:32: warning: variable 'ptr' set but not used [-Wunused-but-set-variable] 6111 | unsigned long alloc_size = 0, ptr; | ^~~ Please review and possibly fold the followup patch. --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org