Re: include/linux/irq-entry-common.h:218: undefined reference to `syscall_enter_audit'

[Thomas Gleixner]

On Thu, Sep 03 2026 at 19:35, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   940de590b839f71d6dc846160534bf202401b8b7
> commit: 6f25517010ddd3f8080d7e06b9b1cb1b64b73772 entry: Rework syscall_audit_enter()
> date:   6 weeks ago
> config: riscv-randconfig-r052-20260903 (https://download.01.org/0day-ci/archive/20260903/202609031938.ZvZZaRQy-lkp@xxxxxxxxx/config)
> compiler: riscv64-linux-gcc (GCC) 8.5.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260903/202609031938.ZvZZaRQy-lkp@xxxxxxxxx/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
> | Fixes: 6f25517010dd ("entry: Rework syscall_audit_enter()")
> | Reported-by: kernel test robot <lkp@xxxxxxxxx>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202609031938.ZvZZaRQy-lkp@xxxxxxxxx/
>
> All errors (new ones prefixed by >>):
>
>    riscv64-linux-ld: arch/riscv/kernel/traps.o: in function `__exit_to_user_mode_validate':
>>> include/linux/irq-entry-common.h:218: undefined reference to `syscall_enter_audit'

Seriously?

>
> vim +218 include/linux/irq-entry-common.h
>
> a70e9f647f501e3 Jinjie Ruan     2025-06-24  212  
> 70fe25a3bc53a89 Thomas Gleixner 2025-10-27  213  static __always_inline void __exit_to_user_mode_validate(void)
> 70fe25a3bc53a89 Thomas Gleixner 2025-10-27  214  {
> a70e9f647f501e3 Jinjie Ruan     2025-06-24  215  	/* Ensure that kernel state is sane for a return to userspace */
> a70e9f647f501e3 Jinjie Ruan     2025-06-24  216  	kmap_assert_nomap();
> a70e9f647f501e3 Jinjie Ruan     2025-06-24  217  	lockdep_assert_irqs_disabled();
> a70e9f647f501e3 Jinjie Ruan     2025-06-24 @218  	lockdep_sys_exit();

What the heck has line 218 to do with that failure?

This is getting stupid. It seems there is yet another compiler aside of
s390 gcc which fails to do dead code elimination but this time it's
worse it also points to the wrong place ....

Thanks,

        tglx