Hi André,

FYI, the error/warning still remains.

tree:   https://github.com/zen-kernel/zen-kernel 5.12/futex2
head:   81255c11c48cc2302883425c87318f9cad37e7e6
commit: 04a97ad2406166e12a13f09c9981f18e6487f530 [3/16] futex2: Implement vectorized wait
config: x86_64-randconfig-a011-20210615 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 64720f57bea6a6bf033feef4a5751ab9c0c3b401)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://github.com/zen-kernel/zen-kernel/commit/04a97ad2406166e12a13f09c9981f18e6487f530
        git remote add zen-kernel-zen-kernel https://github.com/zen-kernel/zen-kernel
        git fetch --no-tags zen-kernel-zen-kernel 5.12/futex2
        git checkout 04a97ad2406166e12a13f09c9981f18e6487f530
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   kernel/sys_ni.c:155:1: warning: no previous prototype for function '__ia32_sys_futex_wake' [-Wmissing-prototypes]
   COND_SYSCALL(futex_wake);
   ^
   arch/x86/include/asm/syscall_wrapper.h:257:2: note: expanded from macro 'COND_SYSCALL'
           __IA32_COND_SYSCALL(name)
           ^
   arch/x86/include/asm/syscall_wrapper.h:120:2: note: expanded from macro '__IA32_COND_SYSCALL'
           __COND_SYSCALL(ia32, sys_##name)
           ^
   arch/x86/include/asm/syscall_wrapper.h:83:14: note: expanded from macro '__COND_SYSCALL'
           __weak long __##abi##_##name(const struct pt_regs *__unused)    \
                       ^
   <scratch space>:142:1: note: expanded from here
   __ia32_sys_futex_wake
   ^
   kernel/sys_ni.c:155:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   arch/x86/include/asm/syscall_wrapper.h:257:2: note: expanded from macro 'COND_SYSCALL'
           __IA32_COND_SYSCALL(name)
           ^
   arch/x86/include/asm/syscall_wrapper.h:120:2: note: expanded from macro '__IA32_COND_SYSCALL'
           __COND_SYSCALL(ia32, sys_##name)
           ^
   arch/x86/include/asm/syscall_wrapper.h:83:9: note: expanded from macro '__COND_SYSCALL'
           __weak long __##abi##_##name(const struct pt_regs *__unused)    \
                  ^
   kernel/sys_ni.c:156:1: warning: no previous prototype for function '__x64_sys_futex_waitv' [-Wmissing-prototypes]
   COND_SYSCALL(futex_waitv);
   ^
   arch/x86/include/asm/syscall_wrapper.h:256:2: note: expanded from macro 'COND_SYSCALL'
           __X64_COND_SYSCALL(name)                                        \
           ^
   arch/x86/include/asm/syscall_wrapper.h:100:2: note: expanded from macro '__X64_COND_SYSCALL'
           __COND_SYSCALL(x64, sys_##name)
           ^
   arch/x86/include/asm/syscall_wrapper.h:83:14: note: expanded from macro '__COND_SYSCALL'
           __weak long __##abi##_##name(const struct pt_regs *__unused)    \
                       ^
   <scratch space>:146:1: note: expanded from here
   __x64_sys_futex_waitv
   ^
   kernel/sys_ni.c:156:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   arch/x86/include/asm/syscall_wrapper.h:256:2: note: expanded from macro 'COND_SYSCALL'
           __X64_COND_SYSCALL(name)                                        \
           ^
   arch/x86/include/asm/syscall_wrapper.h:100:2: note: expanded from macro '__X64_COND_SYSCALL'
           __COND_SYSCALL(x64, sys_##name)
           ^
   arch/x86/include/asm/syscall_wrapper.h:83:9: note: expanded from macro '__COND_SYSCALL'
           __weak long __##abi##_##name(const struct pt_regs *__unused)    \
                  ^
   kernel/sys_ni.c:156:1: warning: no previous prototype for function '__ia32_sys_futex_waitv' [-Wmissing-prototypes]
   COND_SYSCALL(futex_waitv);
   ^
   arch/x86/include/asm/syscall_wrapper.h:257:2: note: expanded from macro 'COND_SYSCALL'
           __IA32_COND_SYSCALL(name)
           ^
   arch/x86/include/asm/syscall_wrapper.h:120:2: note: expanded from macro '__IA32_COND_SYSCALL'
           __COND_SYSCALL(ia32, sys_##name)
           ^
   arch/x86/include/asm/syscall_wrapper.h:83:14: note: expanded from macro '__COND_SYSCALL'
           __weak long __##abi##_##name(const struct pt_regs *__unused)    \
                       ^
   <scratch space>:150:1: note: expanded from here
   __ia32_sys_futex_waitv
   ^
   kernel/sys_ni.c:156:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   arch/x86/include/asm/syscall_wrapper.h:257:2: note: expanded from macro 'COND_SYSCALL'
           __IA32_COND_SYSCALL(name)
           ^
   arch/x86/include/asm/syscall_wrapper.h:120:2: note: expanded from macro '__IA32_COND_SYSCALL'
           __COND_SYSCALL(ia32, sys_##name)
           ^
   arch/x86/include/asm/syscall_wrapper.h:83:9: note: expanded from macro '__COND_SYSCALL'
           __weak long __##abi##_##name(const struct pt_regs *__unused)    \
                  ^
   kernel/sys_ni.c:157:1: warning: no previous prototype for function '__ia32_compat_sys_futex_waitv' [-Wmissing-prototypes]
   COND_SYSCALL_COMPAT(futex_waitv);
   ^
   arch/x86/include/asm/syscall_wrapper.h:218:2: note: expanded from macro 'COND_SYSCALL_COMPAT'
           __IA32_COMPAT_COND_SYSCALL(name)                                \
           ^
   arch/x86/include/asm/syscall_wrapper.h:148:2: note: expanded from macro '__IA32_COMPAT_COND_SYSCALL'
           __COND_SYSCALL(ia32, compat_sys_##name)
           ^
   arch/x86/include/asm/syscall_wrapper.h:83:14: note: expanded from macro '__COND_SYSCALL'
           __weak long __##abi##_##name(const struct pt_regs *__unused)    \
                       ^
   <scratch space>:154:1: note: expanded from here
   __ia32_compat_sys_futex_waitv
   ^
   kernel/sys_ni.c:157:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   arch/x86/include/asm/syscall_wrapper.h:218:2: note: expanded from macro 'COND_SYSCALL_COMPAT'
           __IA32_COMPAT_COND_SYSCALL(name)                                \
           ^
   arch/x86/include/asm/syscall_wrapper.h:148:2: note: expanded from macro '__IA32_COMPAT_COND_SYSCALL'
           __COND_SYSCALL(ia32, compat_sys_##name)
           ^
   arch/x86/include/asm/syscall_wrapper.h:83:9: note: expanded from macro '__COND_SYSCALL'
           __weak long __##abi##_##name(const struct pt_regs *__unused)    \
                  ^
>> kernel/sys_ni.c:157:1: warning: no previous prototype for function '__x32_compat_sys_futex_waitv' [-Wmissing-prototypes]
   COND_SYSCALL_COMPAT(futex_waitv);
   ^
   arch/x86/include/asm/syscall_wrapper.h:219:2: note: expanded from macro 'COND_SYSCALL_COMPAT'
           __X32_COMPAT_COND_SYSCALL(name)
           ^
   arch/x86/include/asm/syscall_wrapper.h:175:2: note: expanded from macro '__X32_COMPAT_COND_SYSCALL'
           __COND_SYSCALL(x32, compat_sys_##name)
           ^
   arch/x86/include/asm/syscall_wrapper.h:83:14: note: expanded from macro '__COND_SYSCALL'
           __weak long __##abi##_##name(const struct pt_regs *__unused)    \
                       ^
   <scratch space>:158:1: note: expanded from here
   __x32_compat_sys_futex_waitv
   ^
   kernel/sys_ni.c:157:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   arch/x86/include/asm/syscall_wrapper.h:219:2: note: expanded from macro 'COND_SYSCALL_COMPAT'
           __X32_COMPAT_COND_SYSCALL(name)
           ^
   arch/x86/include/asm/syscall_wrapper.h:175:2: note: expanded from macro '__X32_COMPAT_COND_SYSCALL'
           __COND_SYSCALL(x32, compat_sys_##name)
           ^
   arch/x86/include/asm/syscall_wrapper.h:83:9: note: expanded from macro '__COND_SYSCALL'
           __weak long __##abi##_##name(const struct pt_regs *__unused)    \
                  ^
   kernel/sys_ni.c:164:1: warning: no previous prototype for function '__x64_sys_kexec_load' [-Wmissing-prototypes]
   COND_SYSCALL(kexec_load);
   ^
   arch/x86/include/asm/syscall_wrapper.h:256:2: note: expanded from macro 'COND_SYSCALL'
           __X64_COND_SYSCALL(name)                                        \
           ^
   arch/x86/include/asm/syscall_wrapper.h:100:2: note: expanded from macro '__X64_COND_SYSCALL'
           __COND_SYSCALL(x64, sys_##name)
           ^
   arch/x86/include/asm/syscall_wrapper.h:83:14: note: expanded from macro '__COND_SYSCALL'
           __weak long __##abi##_##name(const struct pt_regs *__unused)    \
                       ^
   <scratch space>:162:1: note: expanded from here
   __x64_sys_kexec_load
   ^
   kernel/sys_ni.c:164:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   arch/x86/include/asm/syscall_wrapper.h:256:2: note: expanded from macro 'COND_SYSCALL'
           __X64_COND_SYSCALL(name)                                        \
           ^
   arch/x86/include/asm/syscall_wrapper.h:100:2: note: expanded from macro '__X64_COND_SYSCALL'
           __COND_SYSCALL(x64, sys_##name)
           ^
   arch/x86/include/asm/syscall_wrapper.h:83:9: note: expanded from macro '__COND_SYSCALL'
           __weak long __##abi##_##name(const struct pt_regs *__unused)    \
                  ^
   kernel/sys_ni.c:164:1: warning: no previous prototype for function '__ia32_sys_kexec_load' [-Wmissing-prototypes]
   COND_SYSCALL(kexec_load);
   ^
   arch/x86/include/asm/syscall_wrapper.h:257:2: note: expanded from macro 'COND_SYSCALL'
           __IA32_COND_SYSCALL(name)
           ^
   arch/x86/include/asm/syscall_wrapper.h:120:2: note: expanded from macro '__IA32_COND_SYSCALL'
           __COND_SYSCALL(ia32, sys_##name)
           ^
   arch/x86/include/asm/syscall_wrapper.h:83:14: note: expanded from macro '__COND_SYSCALL'
           __weak long __##abi##_##name(const struct pt_regs *__unused)    \
                       ^
   <scratch space>:166:1: note: expanded from here
   __ia32_sys_kexec_load
   ^
   kernel/sys_ni.c:164:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   arch/x86/include/asm/syscall_wrapper.h:257:2: note: expanded from macro 'COND_SYSCALL'
           __IA32_COND_SYSCALL(name)
           ^
   arch/x86/include/asm/syscall_wrapper.h:120:2: note: expanded from macro '__IA32_COND_SYSCALL'
           __COND_SYSCALL(ia32, sys_##name)
           ^
   arch/x86/include/asm/syscall_wrapper.h:83:9: note: expanded from macro '__COND_SYSCALL'
           __weak long __##abi##_##name(const struct pt_regs *__unused)    \
                  ^
   kernel/sys_ni.c:165:1: warning: no previous prototype for function '__ia32_compat_sys_kexec_load' [-Wmissing-prototypes]
   COND_SYSCALL_COMPAT(kexec_load);
   ^
   arch/x86/include/asm/syscall_wrapper.h:218:2: note: expanded from macro 'COND_SYSCALL_COMPAT'
           __IA32_COMPAT_COND_SYSCALL(name)                                \
           ^
   arch/x86/include/asm/syscall_wrapper.h:148:2: note: expanded from macro '__IA32_COMPAT_COND_SYSCALL'
           __COND_SYSCALL(ia32, compat_sys_##name)
           ^
   arch/x86/include/asm/syscall_wrapper.h:83:14: note: expanded from macro '__COND_SYSCALL'
           __weak long __##abi##_##name(const struct pt_regs *__unused)    \
                       ^
   <scratch space>:170:1: note: expanded from here
   __ia32_compat_sys_kexec_load
   ^
   kernel/sys_ni.c:165:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   arch/x86/include/asm/syscall_wrapper.h:218:2: note: expanded from macro 'COND_SYSCALL_COMPAT'
           __IA32_COMPAT_COND_SYSCALL(name)                                \
           ^
   arch/x86/include/asm/syscall_wrapper.h:148:2: note: expanded from macro '__IA32_COMPAT_COND_SYSCALL'
           __COND_SYSCALL(ia32, compat_sys_##name)
           ^
   arch/x86/include/asm/syscall_wrapper.h:83:9: note: expanded from macro '__COND_SYSCALL'
           __weak long __##abi##_##name(const struct pt_regs *__unused)    \
                  ^
   kernel/sys_ni.c:165:1: warning: no previous prototype for function '__x32_compat_sys_kexec_load' [-Wmissing-prototypes]


vim +/__x32_compat_sys_futex_waitv +157 kernel/sys_ni.c

   152	
   153	/* kernel/futex2.c */
   154	COND_SYSCALL(futex_wait);
   155	COND_SYSCALL(futex_wake);
   156	COND_SYSCALL(futex_waitv);
 > 157	COND_SYSCALL_COMPAT(futex_waitv);
   158	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org