Re: [PATCH v6 6/9] futex: Wire up get_robust_list2 syscall

Arnd Bergmann
2025-11-23T19:19:47Z

On Sun, Nov 23, 2025, at 19:47, Thomas Gleixner wrote:
> On Sat, Nov 22 2025 at 14:49, kernel test robot wrote:
>> kernel test robot noticed the following build warnings:
>>
>> [auto build test WARNING on c42ba5a87bdccbca11403b7ca8bad1a57b833732]
>>
>> url: https://github.com/intel-lab-lkp/linux/commits/Andr-Almeida/futex-Use-explicit-sizes-for-compat_robust_list-structs/20251122-135406
>> base: c42ba5a87bdccbca11403b7ca8bad1a57b833732
>> patch link: https://lore.kernel.org/r/20251122-tonyk-robust_futex-v6-6-05fea005a0fd%40igalia.com
>> patch subject: [PATCH v6 6/9] futex: Wire up get_robust_list2 syscall
>> config: arc-allnoconfig (https://download.01.org/0day-ci/archive/20251122/202511221454.rsysOoSt-lkp@intel.com/config)
>> compiler: arc-linux-gcc (GCC) 15.1.0
>> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251122/202511221454.rsysOoSt-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/202511221454.rsysOoSt-lkp@intel.com/
>>
>> All warnings (new ones prefixed by >>):
>>
>>>> <stdin>:1627:2: warning: #warning syscall get_robust_list2 not implemented [-Wcpp]
>> --
>>>> <stdin>:1627:2: warning: #warning syscall get_robust_list2 not implemented [-Wcpp]
>
> Lacks a COND_SYSCALL()

No, it's actually

scripts/syscall.tbl

that is missing, which means that the newer architectures
are missing the update. This used to be include/uapi/asm/unistd.h,
which still exists but is now unused.

Arnd