Re: [PATCH v3 1/3] x86/fred: Allow variable-sized event frame

[Xin Li <xin@zytor.com>]

On 3/19/2025 12:45 PM, kernel test robot wrote:
> Hi Xin,
> 
> kernel test robot noticed the following build errors:
> 
> [auto build test ERROR on 60c162a51180cb2b05d7505a565ab079bfa9cf12]
> 
> url:    https://github.com/intel-lab-lkp/linux/commits/Xin-Li-Intel/x86-fred-Allow-variable-sized-event-frame/20250319-151307
> base:   60c162a51180cb2b05d7505a565ab079bfa9cf12
> patch link:    https://lore.kernel.org/r/20250319071009.1390984-2-xin%40zytor.com
> patch subject: [PATCH v3 1/3] x86/fred: Allow variable-sized event frame
> config: i386-buildonly-randconfig-003-20250320 (https://download.01.org/0day-ci/archive/20250320/202503200325.iKcHqUsb-lkp@intel.com/config)
> compiler: clang version 20.1.0 (https://github.com/llvm/llvm-project 24a30daaa559829ad079f2ff7f73eb4e18095f88)
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250320/202503200325.iKcHqUsb-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/202503200325.iKcHqUsb-lkp@intel.com/
> 
> All errors (new ones prefixed by >>):
> 
>>> init/init_task.c:68:17: error: use of undeclared identifier '__top_init_kernel_stack'
>        68 |         .thread_info    = INIT_THREAD_INFO(init_task),
>           |                           ^
>     arch/x86/include/asm/thread_info.h:76:36: note: expanded from macro 'INIT_THREAD_INFO'
>        76 |         .user_pt_regs   = (struct pt_regs *)__top_init_kernel_stack,    \
>           |                                             ^
>     1 error generated.
> 

Okay, I need to add:

extern unsigned long __top_init_kernel_stack[];

Unfortunately my configs don't expose the build issue.

Thanks!
       Xin