[thomas-weissschuh:b4/uapi-ucontext 2/2] arch/m68k/include/uapi/asm/ucontext.h:9:27: error: field 'uc_mcontext' has incomplete type

[thomas-weissschuh:b4/uapi-ucontext 2/2] arch/m68k/include/uapi/asm/ucontext.h:9:27: error: field 'uc_mcontext' has incomplete type

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/thomas.weissschuh/linux.git b4/uapi-ucontext
head:   89dd25be8eeb8d7b52191bc5f82b7b5e7e5c216f
commit: b3b6bda8db008005cbd3da3b085bed301450704f [2/2] ucontext
config: m68k-allnoconfig (https://download.01.org/0day-ci/archive/20260310/202603100620.daXujbcR-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260310/202603100620.daXujbcR-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202603100620.daXujbcR-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from arch/m68k/include/asm/ucontext.h:8,
                    from arch/m68k/kernel/signal.c:51:
>> arch/m68k/include/uapi/asm/ucontext.h:9:27: error: field 'uc_mcontext' has incomplete type
       9 |         struct mcontext   uc_mcontext;
         |                           ^~~~~~~~~~~


vim +/uc_mcontext +9 arch/m68k/include/uapi/asm/ucontext.h

     4	
     5	struct ucontext {
     6		unsigned long	  uc_flags;
     7		struct ucontext  *uc_link;
     8		stack_t		  uc_stack;
   > 9		struct mcontext	  uc_mcontext;
    10		unsigned long	  uc_filler[80];
    11		sigset_t	  uc_sigmask;	/* mask last for extensibility */
    12	};
    13	

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