On Sun, Nov 23 2025 at 20:19, Arnd Bergmann wrote:
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-explic... base: c42ba5a87bdccbca11403b7ca8bad1a57b833732 patch link: https://lore.kernel.org/r/20251122-tonyk-robust_futex-v6-6-05fea005a0fd%40ig... 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@i...) 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@i...)
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.
So it's both. That syscall depends on CONFIG_FUTEX, which means COND_SYCALL() is required and it's actually added in patch 9/9 while 5/9 which adds the set() variant adds it right away :)
Thanks,
tglx