Re: [tip:core/entry 2/3] arch/s390/include/asm/entry-common.h:49:18: error: call to undeclared function 'task_stack_page'; ISO C99 and later do not support implicit function declarations

On Wed, Jul 08, 2026 at 10:19:04AM +0200, Thomas Gleixner wrote:
> On Wed, Jul 08 2026 at 14:56, kernel test robot wrote:
> > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git core/entry
> > head:   34ef6308418f138395a664bf9f5d80ace9825ac6
> > commit: 7fc04d7044aaa5ffe2afe78979fe6ddd5da24f10 [2/3] syscall_user_dispatch: Make it configurable in Kconfig
> > config: s390-allnoconfig (https://download.01.org/0day-ci/archive/20260708/[email protected]/config)
> > compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 0a2fb2a2269da0e2a3e230beb6cad39ca314db33)
> > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260708/[email protected]/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 <[email protected]>
> > | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
> >
> > All errors (new ones prefixed by >>):
> >
> >    In file included from arch/s390/kernel/traps.c:24:
> >    In file included from include/linux/entry-common.h:5:
> >>> arch/s390/include/asm/entry-common.h:49:18: error: call to undeclared function 'task_stack_page'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
> >       49 |         pai_kernel_exit(current_pt_regs());
> 
> Bah. I missed to spot the header ordering change putting the
> asm/... includes in front. I really hate our include mess.
> 
> Let me fix that up.
>

Ah, I wasn't 100% sure on this - noted for the future.

Sorry about the headache and thank you for the fixup.

~Gregory