tree: https://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux.git pidfd_fdinfo_v2 head: 63fdb1aa04b7ced75d0a4bae0b391ce44ae38387 commit: ba632040fdee631a84ff1ca507c2b60cacc2ebfe [6/7] exit: use task_alive() in do_wait() reproduce: # apt-get install sparse # sparse version: v0.6.1-dirty git checkout ba632040fdee631a84ff1ca507c2b60cacc2ebfe 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: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:1007:17: sparse: sparse: context imbalance in 'wait_task_zombie' - unexpected unlock kernel/exit.c:1199:24: sparse: sparse: context imbalance in 'wait_task_stopped' - unexpected unlock include/linux/uidgid.h:168:9: sparse: sparse: context imbalance in 'wait_task_continued' - unexpected unlock vim +/do_wait +15 arch/x86/include/asm/current.h f0766440dda7ac include/asm-x86/current.h Christoph Lameter 2008-05-09 12 f0766440dda7ac include/asm-x86/current.h Christoph Lameter 2008-05-09 13 static __always_inline struct task_struct *get_current(void) f0766440dda7ac include/asm-x86/current.h Christoph Lameter 2008-05-09 14 { c6ae41e7d469f0 arch/x86/include/asm/current.h Alex Shi 2012-05-11 @15 return this_cpu_read_stable(current_task); f0766440dda7ac include/asm-x86/current.h Christoph Lameter 2008-05-09 16 } f0766440dda7ac include/asm-x86/current.h Christoph Lameter 2008-05-09 17 :::::: The code at line 15 was first introduced by commit :::::: c6ae41e7d469f00d9c92a2b2887c7235d121c009 x86: replace percpu_xxx funcs with this_cpu_xxx :::::: TO: Alex Shi <alex.shi(a)intel.com&gt; :::::: CC: Tejun Heo <tj(a)kernel.org&gt; --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation