tree: https://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git refcount/full head: 816607eeb532d58450b9b09ff241987928e85a9b commit: 3a74865d04f1c603566b8b43b5225cc897431fb6 [4/10] lib/refcount: Move bulk of REFCOUNT_FULL implementation into header reproduce: # apt-get install sparse # sparse version: v0.6.1-rc1-43-g0ccb3b4-dirty git checkout 3a74865d04f1c603566b8b43b5225cc897431fb6 make ARCH=x86_64 allmodconfig make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) kernel/exit.c:100:19: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/exit.c:100:19: sparse: struct sighand_struct [noderef] <asn:4> * kernel/exit.c:100:19: sparse: struct sighand_struct * kernel/exit.c:278:37: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *tsk @@ got struct task_structstruct task_struct *tsk @@ kernel/exit.c:278:37: sparse: expected struct task_struct *tsk kernel/exit.c:278:37: sparse: got struct task_struct [noderef] <asn:4> *real_parent kernel/exit.c:281:32: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *task @@ got struct task_structstruct task_struct *task @@ kernel/exit.c:281:32: sparse: expected struct task_struct *task kernel/exit.c:281:32: sparse: got struct task_struct [noderef] <asn:4> *real_parent kernel/exit.c:282:35: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *task @@ got struct task_structstruct task_struct *task @@ kernel/exit.c:282:35: sparse: expected struct task_struct *task kernel/exit.c:282:35: sparse: got struct task_struct [noderef] <asn:4> *real_parent kernel/exit.c:327:24: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct task_struct *parent @@ got struct task_structstruct task_struct *parent @@ kernel/exit.c:327:24: sparse: expected struct task_struct *parent kernel/exit.c:327:24: sparse: got struct task_struct [noderef] <asn:4> *real_parent kernel/exit.c:356:23: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/exit.c:356:23: sparse: struct task_struct [noderef] <asn:4> * kernel/exit.c:356:23: sparse: struct task_struct * kernel/exit.c:380:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/exit.c:380:9: sparse: struct list_head * kernel/exit.c:380:9: sparse: struct list_head [noderef] <asn:4> * kernel/exit.c:562:29: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct task_struct *reaper @@ got struct task_structstruct task_struct *reaper @@ kernel/exit.c:562:29: sparse: expected struct task_struct *reaper kernel/exit.c:562:29: sparse: got struct task_struct [noderef] <asn:4> *real_parent kernel/exit.c:564:29: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct task_struct *reaper @@ got struct task_structstruct task_struct *reaper @@ kernel/exit.c:564:29: sparse: expected struct task_struct *reaper kernel/exit.c:564:29: sparse: got struct task_struct [noderef] <asn:4> *real_parent kernel/exit.c:626:40: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct task_struct [noderef] <asn:4> *real_parent @@ got task_struct [noderef] <asn:4> *real_parent @@ kernel/exit.c:626:40: sparse: expected struct task_struct [noderef] <asn:4> *real_parent kernel/exit.c:626:40: sparse: got struct task_struct *[assigned] reaper kernel/exit.c:627:25: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/exit.c:627:25: sparse: struct task_struct [noderef] <asn:4> * kernel/exit.c:627:25: sparse: struct task_struct * include/linux/ptrace.h:99:40: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *p1 @@ got struct task_structstruct task_struct *p1 @@ include/linux/ptrace.h:99:40: sparse: expected struct task_struct *p1 include/linux/ptrace.h:99:40: sparse: got struct task_struct [noderef] <asn:4> *real_parent include/linux/ptrace.h:99:60: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected struct task_struct *p2 @@ got struct task_structstruct task_struct *p2 @@ include/linux/ptrace.h:99:60: sparse: expected struct task_struct *p2 include/linux/ptrace.h:99:60: sparse: got struct task_struct [noderef] <asn:4> *parent kernel/exit.c:715:17: sparse: sparse: symbol 'do_exit' redeclared with different type (originally declared at include/linux/kernel.h:328) - different modifiers kernel/exit.c:879:6: sparse: sparse: symbol 'complete_and_exit' redeclared with different type (originally declared at include/linux/kernel.h:329) - different modifiers include/linux/ptrace.h:99:40: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *p1 @@ got struct task_structstruct task_struct *p1 @@ include/linux/ptrace.h:99:40: sparse: expected struct task_struct *p1 include/linux/ptrace.h:99:40: sparse: got struct task_struct [noderef] <asn:4> *real_parent include/linux/ptrace.h:99:60: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected struct task_struct *p2 @@ got struct task_structstruct task_struct *p2 @@ include/linux/ptrace.h:99:60: sparse: expected struct task_struct *p2 include/linux/ptrace.h:99:60: sparse: got struct task_struct [noderef] <asn:4> *parent include/linux/ptrace.h:99:40: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *p1 @@ got struct task_structstruct task_struct *p1 @@ include/linux/ptrace.h:99:40: sparse: expected struct task_struct *p1 include/linux/ptrace.h:99:40: sparse: got struct task_struct [noderef] <asn:4> *real_parent include/linux/ptrace.h:99:60: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected struct task_struct *p2 @@ got struct task_structstruct task_struct *p2 @@ include/linux/ptrace.h:99:60: sparse: expected struct task_struct *p2 include/linux/ptrace.h:99:60: sparse: got struct task_struct [noderef] <asn:4> *parent kernel/exit.c:1429:59: sparse: sparse: incompatible types in comparison expression (different base types): kernel/exit.c:1429:59: sparse: void * kernel/exit.c:1429:59: sparse: struct task_struct [noderef] <asn:4> * kernel/exit.c:1732:13: sparse: sparse: symbol 'abort' was not declared. Should it be static? kernel/exit.c:380:9: sparse: sparse: dereference of noderef expression include/linux/sched/task.h:108:34: sparse: sparse: context imbalance in 'wait_task_stopped' - unexpected unlock kernel/exit.c:1490:9: sparse: sparse: context imbalance in 'do_wait' - different lock contexts for basic block vim +/wait_task_zombie +108 include/linux/sched/task.h 6f175fc9536355 Ingo Molnar 2017-02-06 107 7b3c92b85a65c2 Matthew Wilcox (Oracle 2019-07-04 @108) static inline struct task_struct *get_task_struct(struct task_struct *t) 7b3c92b85a65c2 Matthew Wilcox (Oracle 2019-07-04 109) { 7b3c92b85a65c2 Matthew Wilcox (Oracle 2019-07-04 110) refcount_inc(&t->usage); 7b3c92b85a65c2 Matthew Wilcox (Oracle 2019-07-04 111) return t; 7b3c92b85a65c2 Matthew Wilcox (Oracle 2019-07-04 112) } cda66725c1444d Ingo Molnar 2017-02-05 113 :::::: The code at line 108 was first introduced by commit :::::: 7b3c92b85a65c2db1f542265bc98e1f9e3056eba sched/core: Convert get_task_struct() to return the task :::::: TO: Matthew Wilcox (Oracle) <willy(a)infradead.org&gt; :::::: CC: Ingo Molnar <mingo(a)kernel.org&gt; --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation