[kbuild-all] [tip:tmp.tmp2 176/364] arch/arm/include/asm/ucontext.h:25:32: error: 'sigset_t' undeclared here (not in a function); did you mean 'size_t'?

Monday, 14 June 2021

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git tmp.tmp2
head:   adcceb5eb7aee38e4a9c15bdf599655f0e1b1324
commit: be65473fb5b77d57d8955beffd5aa370cfdae467 [176/364] sched/headers, rcu: Remove
<linux/sched/signal.h> dependency from <linux/rcuwait.h>
config: arm-spear13xx_defconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O
~/bin/make.cross
        chmod +x ~/bin/make.cross
        #
https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=be...
        git remote add tip https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git
        git fetch --no-tags tip tmp.tmp2
        git checkout be65473fb5b77d57d8955beffd5aa370cfdae467
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com&gt;

All errors (new ones prefixed by >>):

         |                                                              ^~
   include/linux/compiler_types.h:308:9: note: in definition of macro
'__compiletime_assert'
     308 |   if (!(condition))     \
         |         ^~~~~~~~~
   include/linux/compiler_types.h:328:2: note: in expansion of macro
'_compiletime_assert'
     328 |  _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |  ^~~~~~~~~~~~~~~~~~~
   include/asm-generic/rwonce.h:36:2: note: in expansion of macro
'compiletime_assert'
      36 |  compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
         |  ^~~~~~~~~~~~~~~~~~
   include/asm-generic/rwonce.h:36:21: note: in expansion of macro
'__native_word'
      36 |  compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
         |                     ^~~~~~~~~~~~~
   include/asm-generic/rwonce.h:49:2: note: in expansion of macro
'compiletime_assert_rwonce_type'
      49 |  compiletime_assert_rwonce_type(x);    \
         |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/sched/thread_info_api.h:194:9: note: in expansion of macro
'READ_ONCE'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |         ^~~~~~~~~
   include/linux/sched/thread_info_api.h:194:19: note: in expansion of macro
'task_thread_info'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |                   ^~~~~~~~~~~~~~~~
   include/linux/sched/thread_info_api.h:38:62: error: 'const struct task_struct'
has no member named 'stack'
      38 | # define task_thread_info(task) ((struct thread_info *)(task)->stack)
         |                                                              ^~
   include/linux/compiler_types.h:308:9: note: in definition of macro
'__compiletime_assert'
     308 |   if (!(condition))     \
         |         ^~~~~~~~~
   include/linux/compiler_types.h:328:2: note: in expansion of macro
'_compiletime_assert'
     328 |  _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |  ^~~~~~~~~~~~~~~~~~~
   include/asm-generic/rwonce.h:36:2: note: in expansion of macro
'compiletime_assert'
      36 |  compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
         |  ^~~~~~~~~~~~~~~~~~
   include/asm-generic/rwonce.h:36:21: note: in expansion of macro
'__native_word'
      36 |  compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
         |                     ^~~~~~~~~~~~~
   include/asm-generic/rwonce.h:49:2: note: in expansion of macro
'compiletime_assert_rwonce_type'
      49 |  compiletime_assert_rwonce_type(x);    \
         |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/sched/thread_info_api.h:194:9: note: in expansion of macro
'READ_ONCE'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |         ^~~~~~~~~
   include/linux/sched/thread_info_api.h:194:19: note: in expansion of macro
'task_thread_info'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |                   ^~~~~~~~~~~~~~~~
   include/linux/sched/thread_info_api.h:38:62: error: 'const struct task_struct'
has no member named 'stack'
      38 | # define task_thread_info(task) ((struct thread_info *)(task)->stack)
         |                                                              ^~
   include/linux/compiler_types.h:308:9: note: in definition of macro
'__compiletime_assert'
     308 |   if (!(condition))     \
         |         ^~~~~~~~~
   include/linux/compiler_types.h:328:2: note: in expansion of macro
'_compiletime_assert'
     328 |  _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |  ^~~~~~~~~~~~~~~~~~~
   include/asm-generic/rwonce.h:36:2: note: in expansion of macro
'compiletime_assert'
      36 |  compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
         |  ^~~~~~~~~~~~~~~~~~
   include/asm-generic/rwonce.h:49:2: note: in expansion of macro
'compiletime_assert_rwonce_type'
      49 |  compiletime_assert_rwonce_type(x);    \
         |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/sched/thread_info_api.h:194:9: note: in expansion of macro
'READ_ONCE'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |         ^~~~~~~~~
   include/linux/sched/thread_info_api.h:194:19: note: in expansion of macro
'task_thread_info'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |                   ^~~~~~~~~~~~~~~~
   include/linux/sched/thread_info_api.h:38:62: error: 'const struct task_struct'
has no member named 'stack'
      38 | # define task_thread_info(task) ((struct thread_info *)(task)->stack)
         |                                                              ^~
   include/linux/compiler_types.h:279:13: note: in definition of macro
'__unqual_scalar_typeof'
     279 |   _Generic((x),      \
         |             ^
   include/asm-generic/rwonce.h:50:2: note: in expansion of macro '__READ_ONCE'
      50 |  __READ_ONCE(x);       \
         |  ^~~~~~~~~~~
   include/linux/sched/thread_info_api.h:194:9: note: in expansion of macro
'READ_ONCE'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |         ^~~~~~~~~
   include/linux/sched/thread_info_api.h:194:19: note: in expansion of macro
'task_thread_info'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |                   ^~~~~~~~~~~~~~~~
   In file included from ./arch/arm/include/generated/asm/rwonce.h:1,
                    from include/linux/compiler.h:248,
                    from arch/arm/kernel/asm-offsets.c:10:
   include/linux/sched/thread_info_api.h:38:62: error: 'const struct task_struct'
has no member named 'stack'
      38 | # define task_thread_info(task) ((struct thread_info *)(task)->stack)
         |                                                              ^~
   include/asm-generic/rwonce.h:44:72: note: in definition of macro '__READ_ONCE'
      44 | #define __READ_ONCE(x) (*(const volatile __unqual_scalar_typeof(x) *)&(x))
         |                                                                        ^
   include/linux/sched/thread_info_api.h:194:9: note: in expansion of macro
'READ_ONCE'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |         ^~~~~~~~~
   include/linux/sched/thread_info_api.h:194:19: note: in expansion of macro
'task_thread_info'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |                   ^~~~~~~~~~~~~~~~
   In file included from arch/arm/kernel/signal.h:1,
                    from arch/arm/kernel/asm-offsets.c:28:
   arch/arm/include/asm/ucontext.h: At top level:
...
> arch/arm/include/asm/ucontext.h:21:2: error: unknown type name
'stack_t'       21 |  stack_t    uc_stack;
         |  ^~~~~~~
...
> arch/arm/include/asm/ucontext.h:22:20: error: field
'uc_mcontext' has incomplete type       22 |  struct sigcontext
uc_mcontext;
         |                    ^~~~~~~~~~~
...
> arch/arm/include/asm/ucontext.h:23:2: error: unknown type name
'sigset_t'       23 |  sigset_t   uc_sigmask;
         |  ^~~~~~~~
...
> arch/arm/include/asm/ucontext.h:25:32: error: 'sigset_t'
undeclared here (not in a function); did you mean 'size_t'?       25 |  int 
  __unused[32 - (sizeof (sigset_t) / sizeof (int))];
         |                                ^~~~~~~~
         |                                size_t
   In file included from arch/arm/kernel/asm-offsets.c:28:
...
> arch/arm/kernel/signal.h:9:17: error: field 'info' has
incomplete type        9 |  struct siginfo info;
         |                 ^~~~
   In file included from arch/arm/kernel/asm-offsets.c:26:
   arch/arm/kernel/asm-offsets.c: In function 'main':
   include/linux/compiler_types.h:140:35: error: 'struct task_struct' has no
member named 'stack_canary'
     140 | #define __compiler_offsetof(a, b) __builtin_offsetof(a, b)
         |                                   ^~~~~~~~~~~~~~~~~~
   include/linux/kbuild.h:6:62: note: in definition of macro 'DEFINE'
       6 |  asm volatile("\n.ascii \"->" #sym " %0 " #val
"\"" : : "i" (val))
         |                                                              ^~~
   include/linux/stddef.h:17:32: note: in expansion of macro
'__compiler_offsetof'
      17 | #define offsetof(TYPE, MEMBER) __compiler_offsetof(TYPE, MEMBER)
         |                                ^~~~~~~~~~~~~~~~~~~
   arch/arm/kernel/asm-offsets.c:41:28: note: in expansion of macro 'offsetof'
      41 |   DEFINE(TSK_STACK_CANARY, offsetof(struct task_struct, stack_canary));
         |                            ^~~~~~~~
   cc1: some warnings being treated as errors
--
         |                                                              ^~
   include/linux/compiler_types.h:308:9: note: in definition of macro
'__compiletime_assert'
     308 |   if (!(condition))     \
         |         ^~~~~~~~~
   include/linux/compiler_types.h:328:2: note: in expansion of macro
'_compiletime_assert'
     328 |  _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |  ^~~~~~~~~~~~~~~~~~~
   include/asm-generic/rwonce.h:36:2: note: in expansion of macro
'compiletime_assert'
      36 |  compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
         |  ^~~~~~~~~~~~~~~~~~
   include/asm-generic/rwonce.h:36:21: note: in expansion of macro
'__native_word'
      36 |  compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
         |                     ^~~~~~~~~~~~~
   include/asm-generic/rwonce.h:49:2: note: in expansion of macro
'compiletime_assert_rwonce_type'
      49 |  compiletime_assert_rwonce_type(x);    \
         |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/sched/thread_info_api.h:194:9: note: in expansion of macro
'READ_ONCE'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |         ^~~~~~~~~
   include/linux/sched/thread_info_api.h:194:19: note: in expansion of macro
'task_thread_info'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |                   ^~~~~~~~~~~~~~~~
   include/linux/sched/thread_info_api.h:38:62: error: 'const struct task_struct'
has no member named 'stack'
      38 | # define task_thread_info(task) ((struct thread_info *)(task)->stack)
         |                                                              ^~
   include/linux/compiler_types.h:308:9: note: in definition of macro
'__compiletime_assert'
     308 |   if (!(condition))     \
         |         ^~~~~~~~~
   include/linux/compiler_types.h:328:2: note: in expansion of macro
'_compiletime_assert'
     328 |  _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |  ^~~~~~~~~~~~~~~~~~~
   include/asm-generic/rwonce.h:36:2: note: in expansion of macro
'compiletime_assert'
      36 |  compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
         |  ^~~~~~~~~~~~~~~~~~
   include/asm-generic/rwonce.h:36:21: note: in expansion of macro
'__native_word'
      36 |  compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
         |                     ^~~~~~~~~~~~~
   include/asm-generic/rwonce.h:49:2: note: in expansion of macro
'compiletime_assert_rwonce_type'
      49 |  compiletime_assert_rwonce_type(x);    \
         |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/sched/thread_info_api.h:194:9: note: in expansion of macro
'READ_ONCE'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |         ^~~~~~~~~
   include/linux/sched/thread_info_api.h:194:19: note: in expansion of macro
'task_thread_info'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |                   ^~~~~~~~~~~~~~~~
   include/linux/sched/thread_info_api.h:38:62: error: 'const struct task_struct'
has no member named 'stack'
      38 | # define task_thread_info(task) ((struct thread_info *)(task)->stack)
         |                                                              ^~
   include/linux/compiler_types.h:308:9: note: in definition of macro
'__compiletime_assert'
     308 |   if (!(condition))     \
         |         ^~~~~~~~~
   include/linux/compiler_types.h:328:2: note: in expansion of macro
'_compiletime_assert'
     328 |  _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |  ^~~~~~~~~~~~~~~~~~~
   include/asm-generic/rwonce.h:36:2: note: in expansion of macro
'compiletime_assert'
      36 |  compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
         |  ^~~~~~~~~~~~~~~~~~
   include/asm-generic/rwonce.h:49:2: note: in expansion of macro
'compiletime_assert_rwonce_type'
      49 |  compiletime_assert_rwonce_type(x);    \
         |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/sched/thread_info_api.h:194:9: note: in expansion of macro
'READ_ONCE'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |         ^~~~~~~~~
   include/linux/sched/thread_info_api.h:194:19: note: in expansion of macro
'task_thread_info'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |                   ^~~~~~~~~~~~~~~~
   include/linux/sched/thread_info_api.h:38:62: error: 'const struct task_struct'
has no member named 'stack'
      38 | # define task_thread_info(task) ((struct thread_info *)(task)->stack)
         |                                                              ^~
   include/linux/compiler_types.h:279:13: note: in definition of macro
'__unqual_scalar_typeof'
     279 |   _Generic((x),      \
         |             ^
   include/asm-generic/rwonce.h:50:2: note: in expansion of macro '__READ_ONCE'
      50 |  __READ_ONCE(x);       \
         |  ^~~~~~~~~~~
   include/linux/sched/thread_info_api.h:194:9: note: in expansion of macro
'READ_ONCE'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |         ^~~~~~~~~
   include/linux/sched/thread_info_api.h:194:19: note: in expansion of macro
'task_thread_info'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |                   ^~~~~~~~~~~~~~~~
   In file included from ./arch/arm/include/generated/asm/rwonce.h:1,
                    from include/linux/compiler.h:248,
                    from arch/arm/kernel/asm-offsets.c:10:
   include/linux/sched/thread_info_api.h:38:62: error: 'const struct task_struct'
has no member named 'stack'
      38 | # define task_thread_info(task) ((struct thread_info *)(task)->stack)
         |                                                              ^~
   include/asm-generic/rwonce.h:44:72: note: in definition of macro '__READ_ONCE'
      44 | #define __READ_ONCE(x) (*(const volatile __unqual_scalar_typeof(x) *)&(x))
         |                                                                        ^
   include/linux/sched/thread_info_api.h:194:9: note: in expansion of macro
'READ_ONCE'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |         ^~~~~~~~~
   include/linux/sched/thread_info_api.h:194:19: note: in expansion of macro
'task_thread_info'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |                   ^~~~~~~~~~~~~~~~
   In file included from arch/arm/kernel/signal.h:1,
                    from arch/arm/kernel/asm-offsets.c:28:
   arch/arm/include/asm/ucontext.h: At top level:
...
> arch/arm/include/asm/ucontext.h:21:2: error: unknown type name
'stack_t'       21 |  stack_t    uc_stack;
         |  ^~~~~~~
...
> arch/arm/include/asm/ucontext.h:22:20: error: field
'uc_mcontext' has incomplete type       22 |  struct sigcontext
uc_mcontext;
         |                    ^~~~~~~~~~~
...
> arch/arm/include/asm/ucontext.h:23:2: error: unknown type name
'sigset_t'       23 |  sigset_t   uc_sigmask;
         |  ^~~~~~~~
...
> arch/arm/include/asm/ucontext.h:25:32: error: 'sigset_t'
undeclared here (not in a function); did you mean 'size_t'?       25 |  int 
  __unused[32 - (sizeof (sigset_t) / sizeof (int))];
         |                                ^~~~~~~~
         |                                size_t
   In file included from arch/arm/kernel/asm-offsets.c:28:
...
> arch/arm/kernel/signal.h:9:17: error: field 'info' has
incomplete type        9 |  struct siginfo info;
         |                 ^~~~
   In file included from arch/arm/kernel/asm-offsets.c:26:
   arch/arm/kernel/asm-offsets.c: In function 'main':
   include/linux/compiler_types.h:140:35: error: 'struct task_struct' has no
member named 'stack_canary'
     140 | #define __compiler_offsetof(a, b) __builtin_offsetof(a, b)
         |                                   ^~~~~~~~~~~~~~~~~~
   include/linux/kbuild.h:6:62: note: in definition of macro 'DEFINE'
       6 |  asm volatile("\n.ascii \"->" #sym " %0 " #val
"\"" : : "i" (val))
         |                                                              ^~~
   include/linux/stddef.h:17:32: note: in expansion of macro
'__compiler_offsetof'
      17 | #define offsetof(TYPE, MEMBER) __compiler_offsetof(TYPE, MEMBER)
         |                                ^~~~~~~~~~~~~~~~~~~
   arch/arm/kernel/asm-offsets.c:41:28: note: in expansion of macro 'offsetof'
      41 |   DEFINE(TSK_STACK_CANARY, offsetof(struct task_struct, stack_canary));
         |                            ^~~~~~~~
   cc1: some warnings being treated as errors
   make[2]: *** [scripts/Makefile.build:117: arch/arm/kernel/asm-offsets.s] Error 1
   make[2]: Target '__build' not remade because of errors.
   make[1]: *** [Makefile:1232: prepare0] Error 2
   make[1]: Target 'modules_prepare' not remade because of errors.
   make: *** [Makefile:215: __sub-make] Error 2
   make: Target 'modules_prepare' not remade because of errors.
--
         |                                                              ^~
   include/linux/compiler_types.h:308:9: note: in definition of macro
'__compiletime_assert'
     308 |   if (!(condition))     \
         |         ^~~~~~~~~
   include/linux/compiler_types.h:328:2: note: in expansion of macro
'_compiletime_assert'
     328 |  _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |  ^~~~~~~~~~~~~~~~~~~
   include/asm-generic/rwonce.h:36:2: note: in expansion of macro
'compiletime_assert'
      36 |  compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
         |  ^~~~~~~~~~~~~~~~~~
   include/asm-generic/rwonce.h:36:21: note: in expansion of macro
'__native_word'
      36 |  compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
         |                     ^~~~~~~~~~~~~
   include/asm-generic/rwonce.h:49:2: note: in expansion of macro
'compiletime_assert_rwonce_type'
      49 |  compiletime_assert_rwonce_type(x);    \
         |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/sched/thread_info_api.h:194:9: note: in expansion of macro
'READ_ONCE'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |         ^~~~~~~~~
   include/linux/sched/thread_info_api.h:194:19: note: in expansion of macro
'task_thread_info'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |                   ^~~~~~~~~~~~~~~~
   include/linux/sched/thread_info_api.h:38:62: error: 'const struct task_struct'
has no member named 'stack'
      38 | # define task_thread_info(task) ((struct thread_info *)(task)->stack)
         |                                                              ^~
   include/linux/compiler_types.h:308:9: note: in definition of macro
'__compiletime_assert'
     308 |   if (!(condition))     \
         |         ^~~~~~~~~
   include/linux/compiler_types.h:328:2: note: in expansion of macro
'_compiletime_assert'
     328 |  _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |  ^~~~~~~~~~~~~~~~~~~
   include/asm-generic/rwonce.h:36:2: note: in expansion of macro
'compiletime_assert'
      36 |  compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
         |  ^~~~~~~~~~~~~~~~~~
   include/asm-generic/rwonce.h:36:21: note: in expansion of macro
'__native_word'
      36 |  compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
         |                     ^~~~~~~~~~~~~
   include/asm-generic/rwonce.h:49:2: note: in expansion of macro
'compiletime_assert_rwonce_type'
      49 |  compiletime_assert_rwonce_type(x);    \
         |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/sched/thread_info_api.h:194:9: note: in expansion of macro
'READ_ONCE'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |         ^~~~~~~~~
   include/linux/sched/thread_info_api.h:194:19: note: in expansion of macro
'task_thread_info'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |                   ^~~~~~~~~~~~~~~~
   include/linux/sched/thread_info_api.h:38:62: error: 'const struct task_struct'
has no member named 'stack'
      38 | # define task_thread_info(task) ((struct thread_info *)(task)->stack)
         |                                                              ^~
   include/linux/compiler_types.h:308:9: note: in definition of macro
'__compiletime_assert'
     308 |   if (!(condition))     \
         |         ^~~~~~~~~
   include/linux/compiler_types.h:328:2: note: in expansion of macro
'_compiletime_assert'
     328 |  _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |  ^~~~~~~~~~~~~~~~~~~
   include/asm-generic/rwonce.h:36:2: note: in expansion of macro
'compiletime_assert'
      36 |  compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
         |  ^~~~~~~~~~~~~~~~~~
   include/asm-generic/rwonce.h:49:2: note: in expansion of macro
'compiletime_assert_rwonce_type'
      49 |  compiletime_assert_rwonce_type(x);    \
         |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/sched/thread_info_api.h:194:9: note: in expansion of macro
'READ_ONCE'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |         ^~~~~~~~~
   include/linux/sched/thread_info_api.h:194:19: note: in expansion of macro
'task_thread_info'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |                   ^~~~~~~~~~~~~~~~
   include/linux/sched/thread_info_api.h:38:62: error: 'const struct task_struct'
has no member named 'stack'
      38 | # define task_thread_info(task) ((struct thread_info *)(task)->stack)
         |                                                              ^~
   include/linux/compiler_types.h:279:13: note: in definition of macro
'__unqual_scalar_typeof'
     279 |   _Generic((x),      \
         |             ^
   include/asm-generic/rwonce.h:50:2: note: in expansion of macro '__READ_ONCE'
      50 |  __READ_ONCE(x);       \
         |  ^~~~~~~~~~~
   include/linux/sched/thread_info_api.h:194:9: note: in expansion of macro
'READ_ONCE'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |         ^~~~~~~~~
   include/linux/sched/thread_info_api.h:194:19: note: in expansion of macro
'task_thread_info'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |                   ^~~~~~~~~~~~~~~~
   In file included from ./arch/arm/include/generated/asm/rwonce.h:1,
                    from include/linux/compiler.h:248,
                    from arch/arm/kernel/asm-offsets.c:10:
   include/linux/sched/thread_info_api.h:38:62: error: 'const struct task_struct'
has no member named 'stack'
      38 | # define task_thread_info(task) ((struct thread_info *)(task)->stack)
         |                                                              ^~
   include/asm-generic/rwonce.h:44:72: note: in definition of macro '__READ_ONCE'
      44 | #define __READ_ONCE(x) (*(const volatile __unqual_scalar_typeof(x) *)&(x))
         |                                                                        ^
   include/linux/sched/thread_info_api.h:194:9: note: in expansion of macro
'READ_ONCE'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |         ^~~~~~~~~
   include/linux/sched/thread_info_api.h:194:19: note: in expansion of macro
'task_thread_info'
     194 |  return READ_ONCE(task_thread_info(p)->cpu);
         |                   ^~~~~~~~~~~~~~~~
   In file included from arch/arm/kernel/signal.h:1,
                    from arch/arm/kernel/asm-offsets.c:28:
   arch/arm/include/asm/ucontext.h: At top level:
...
> arch/arm/include/asm/ucontext.h:21:2: error: unknown type name
'stack_t'       21 |  stack_t    uc_stack;
         |  ^~~~~~~
...
> arch/arm/include/asm/ucontext.h:22:20: error: field
'uc_mcontext' has incomplete type       22 |  struct sigcontext
uc_mcontext;
         |                    ^~~~~~~~~~~
...
> arch/arm/include/asm/ucontext.h:23:2: error: unknown type name
'sigset_t'       23 |  sigset_t   uc_sigmask;
         |  ^~~~~~~~
...
> arch/arm/include/asm/ucontext.h:25:32: error: 'sigset_t'
undeclared here (not in a function); did you mean 'size_t'?       25 |  int 
  __unused[32 - (sizeof (sigset_t) / sizeof (int))];
         |                                ^~~~~~~~
         |                                size_t
   In file included from arch/arm/kernel/asm-offsets.c:28:
...
> arch/arm/kernel/signal.h:9:17: error: field 'info' has
incomplete type        9 |  struct siginfo info;
         |                 ^~~~
   In file included from arch/arm/kernel/asm-offsets.c:26:
   arch/arm/kernel/asm-offsets.c: In function 'main':
   include/linux/compiler_types.h:140:35: error: 'struct task_struct' has no
member named 'stack_canary'
     140 | #define __compiler_offsetof(a, b) __builtin_offsetof(a, b)
         |                                   ^~~~~~~~~~~~~~~~~~
   include/linux/kbuild.h:6:62: note: in definition of macro 'DEFINE'
       6 |  asm volatile("\n.ascii \"->" #sym " %0 " #val
"\"" : : "i" (val))
         |                                                              ^~~
   include/linux/stddef.h:17:32: note: in expansion of macro
'__compiler_offsetof'
      17 | #define offsetof(TYPE, MEMBER) __compiler_offsetof(TYPE, MEMBER)
         |                                ^~~~~~~~~~~~~~~~~~~
   arch/arm/kernel/asm-offsets.c:41:28: note: in expansion of macro 'offsetof'
      41 |   DEFINE(TSK_STACK_CANARY, offsetof(struct task_struct, stack_canary));
         |                            ^~~~~~~~
   cc1: some warnings being treated as errors
   make[2]: *** [scripts/Makefile.build:117: arch/arm/kernel/asm-offsets.s] Error 1
   make[2]: Target '__build' not remade because of errors.
   make[1]: *** [Makefile:1232: prepare0] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:215: __sub-make] Error 2
   make: Target 'prepare' not remade because of errors.

vim +25 arch/arm/include/asm/ucontext.h

85fe068123aa11 include/asm-arm/ucontext.h Daniel Jacobowitz 2006-06-24   7  
85fe068123aa11 include/asm-arm/ucontext.h Daniel Jacobowitz 2006-06-24   8  /*
85fe068123aa11 include/asm-arm/ucontext.h Daniel Jacobowitz 2006-06-24   9   * struct
sigcontext only has room for the basic registers, but struct
85fe068123aa11 include/asm-arm/ucontext.h Daniel Jacobowitz 2006-06-24  10   * ucontext
now has room for all registers which need to be saved and
85fe068123aa11 include/asm-arm/ucontext.h Daniel Jacobowitz 2006-06-24  11   * restored. 
Coprocessor registers are stored in uc_regspace.  Each
85fe068123aa11 include/asm-arm/ucontext.h Daniel Jacobowitz 2006-06-24  12   *
coprocessor's saved state should start with a documented 32-bit magic
85fe068123aa11 include/asm-arm/ucontext.h Daniel Jacobowitz 2006-06-24  13   * number,
followed by a 32-bit word giving the coproccesor's saved size.
85fe068123aa11 include/asm-arm/ucontext.h Daniel Jacobowitz 2006-06-24  14   * uc_regspace
may be expanded if necessary, although this takes some
85fe068123aa11 include/asm-arm/ucontext.h Daniel Jacobowitz 2006-06-24  15   *
coordination with glibc.
85fe068123aa11 include/asm-arm/ucontext.h Daniel Jacobowitz 2006-06-24  16   */
85fe068123aa11 include/asm-arm/ucontext.h Daniel Jacobowitz 2006-06-24  17  
^1da177e4c3f41 include/asm-arm/ucontext.h Linus Torvalds    2005-04-16  18  struct
ucontext {
^1da177e4c3f41 include/asm-arm/ucontext.h Linus Torvalds    2005-04-16  19  	unsigned
long	  uc_flags;
^1da177e4c3f41 include/asm-arm/ucontext.h Linus Torvalds    2005-04-16  20  	struct
ucontext  *uc_link;
^1da177e4c3f41 include/asm-arm/ucontext.h Linus Torvalds    2005-04-16 @21  	stack_t		 
uc_stack;
^1da177e4c3f41 include/asm-arm/ucontext.h Linus Torvalds    2005-04-16 @22  	struct
sigcontext uc_mcontext;
85fe068123aa11 include/asm-arm/ucontext.h Daniel Jacobowitz 2006-06-24 @23  	sigset_t	 
uc_sigmask;
85fe068123aa11 include/asm-arm/ucontext.h Daniel Jacobowitz 2006-06-24  24  	/* Allow for
uc_sigmask growth.  Glibc uses a 1024-bit sigset_t.  */
85fe068123aa11 include/asm-arm/ucontext.h Daniel Jacobowitz 2006-06-24 @25  	int		 
__unused[32 - (sizeof (sigset_t) / sizeof (int))];
85fe068123aa11 include/asm-arm/ucontext.h Daniel Jacobowitz 2006-06-24  26  	/* Last for
extensibility.  Eight byte aligned because some
85fe068123aa11 include/asm-arm/ucontext.h Daniel Jacobowitz 2006-06-24  27  	  
coprocessors require eight byte alignment.  */
85fe068123aa11 include/asm-arm/ucontext.h Daniel Jacobowitz 2006-06-24  28   	unsigned
long	  uc_regspace[128] __attribute__((__aligned__(8)));
^1da177e4c3f41 include/asm-arm/ucontext.h Linus Torvalds    2005-04-16  29  };
^1da177e4c3f41 include/asm-arm/ucontext.h Linus Torvalds    2005-04-16  30  

:::::: The code at line 25 was first introduced by commit
:::::: 85fe068123aa11d3477ce88c7d365e233b1f2e10 [ARM] 3648/1: Update struct ucontext
layout for coprocessor registers

:::::: TO: Daniel Jacobowitz <drow(a)false.org&gt;
:::::: CC: Russell King <rmk+kernel(a)arm.linux.org.uk&gt;

---
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[kbuild-all] [tip:tmp.tmp2 176/364] arch/arm/include/asm/ucontext.h:25:32: error: 'sigset_t' undeclared here (not in a function); did you mean 'size_t'?