Hi Peter,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on cb0e52b7748737b2cf6481fdd9b920ce7e1ebbdf]

url:    https://github.com/0day-ci/linux/commits/Peter-Oskolkov/sched-mm-x86-uaccess-implement-User-Managed-Concurrency-Groups/20211122-052209
base:   cb0e52b7748737b2cf6481fdd9b920ce7e1ebbdf
config: arm64-randconfig-r012-20211121 (attached as .config)
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 arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # https://github.com/0day-ci/linux/commit/e455791cacec2b140558a717d2b8b07f5561a251
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Peter-Oskolkov/sched-mm-x86-uaccess-implement-User-Managed-Concurrency-Groups/20211122-052209
        git checkout e455791cacec2b140558a717d2b8b07f5561a251
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm64 

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 >>):

           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                                  ^
   <scratch space>:34:1: note: expanded from here
   __arm64_sys_recvmsg
   ^
   kernel/sys_ni.c:257:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                      ^
   kernel/sys_ni.c:263:1: warning: no previous prototype for function '__arm64_sys_mremap' [-Wmissing-prototypes]
   COND_SYSCALL(mremap);
   ^
   arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                                  ^
   <scratch space>:39:1: note: expanded from here
   __arm64_sys_mremap
   ^
   kernel/sys_ni.c:263:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                      ^
   kernel/sys_ni.c:266:1: warning: no previous prototype for function '__arm64_sys_add_key' [-Wmissing-prototypes]
   COND_SYSCALL(add_key);
   ^
   arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                                  ^
   <scratch space>:40:1: note: expanded from here
   __arm64_sys_add_key
   ^
   kernel/sys_ni.c:266:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                      ^
   kernel/sys_ni.c:267:1: warning: no previous prototype for function '__arm64_sys_request_key' [-Wmissing-prototypes]
   COND_SYSCALL(request_key);
   ^
   arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                                  ^
   <scratch space>:41:1: note: expanded from here
   __arm64_sys_request_key
   ^
   kernel/sys_ni.c:267:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                      ^
   kernel/sys_ni.c:268:1: warning: no previous prototype for function '__arm64_sys_keyctl' [-Wmissing-prototypes]
   COND_SYSCALL(keyctl);
   ^
   arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                                  ^
   <scratch space>:42:1: note: expanded from here
   __arm64_sys_keyctl
   ^
   kernel/sys_ni.c:268:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                      ^
   kernel/sys_ni.c:272:1: warning: no previous prototype for function '__arm64_sys_landlock_create_ruleset' [-Wmissing-prototypes]
   COND_SYSCALL(landlock_create_ruleset);
   ^
   arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                                  ^
   <scratch space>:47:1: note: expanded from here
   __arm64_sys_landlock_create_ruleset
   ^
   kernel/sys_ni.c:272:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                      ^
   kernel/sys_ni.c:273:1: warning: no previous prototype for function '__arm64_sys_landlock_add_rule' [-Wmissing-prototypes]
   COND_SYSCALL(landlock_add_rule);
   ^
   arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                                  ^
   <scratch space>:48:1: note: expanded from here
   __arm64_sys_landlock_add_rule
   ^
   kernel/sys_ni.c:273:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                      ^
   kernel/sys_ni.c:274:1: warning: no previous prototype for function '__arm64_sys_landlock_restrict_self' [-Wmissing-prototypes]
   COND_SYSCALL(landlock_restrict_self);
   ^
   arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                                  ^
   <scratch space>:49:1: note: expanded from here
   __arm64_sys_landlock_restrict_self
   ^
   kernel/sys_ni.c:274:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                      ^
>> kernel/sys_ni.c:277:1: warning: no previous prototype for function '__arm64_sys_umcg_ctl' [-Wmissing-prototypes]
   COND_SYSCALL(umcg_ctl);
   ^
   arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                                  ^
   <scratch space>:50:1: note: expanded from here
   __arm64_sys_umcg_ctl
   ^
   kernel/sys_ni.c:277:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                      ^
>> kernel/sys_ni.c:278:1: warning: no previous prototype for function '__arm64_sys_umcg_wait' [-Wmissing-prototypes]
   COND_SYSCALL(umcg_wait);
   ^
   arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                                  ^
   <scratch space>:51:1: note: expanded from here
   __arm64_sys_umcg_wait
   ^
   kernel/sys_ni.c:278:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                      ^
   kernel/sys_ni.c:283:1: warning: no previous prototype for function '__arm64_sys_fadvise64_64' [-Wmissing-prototypes]
   COND_SYSCALL(fadvise64_64);
   ^
   arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                                  ^
   <scratch space>:52:1: note: expanded from here
   __arm64_sys_fadvise64_64
   ^
   kernel/sys_ni.c:283:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                      ^
   kernel/sys_ni.c:286:1: warning: no previous prototype for function '__arm64_sys_swapon' [-Wmissing-prototypes]
   COND_SYSCALL(swapon);
   ^
   arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                                  ^
   <scratch space>:53:1: note: expanded from here
   __arm64_sys_swapon
   ^
   kernel/sys_ni.c:286:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                      ^
   kernel/sys_ni.c:287:1: warning: no previous prototype for function '__arm64_sys_swapoff' [-Wmissing-prototypes]
   COND_SYSCALL(swapoff);
   ^
   arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                                  ^
   <scratch space>:54:1: note: expanded from here
   __arm64_sys_swapoff
   ^
   kernel/sys_ni.c:287:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                      ^
   kernel/sys_ni.c:288:1: warning: no previous prototype for function '__arm64_sys_mprotect' [-Wmissing-prototypes]
   COND_SYSCALL(mprotect);
   ^
   arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                                  ^
   <scratch space>:55:1: note: expanded from here
   __arm64_sys_mprotect
   ^
   kernel/sys_ni.c:288:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                      ^
   kernel/sys_ni.c:289:1: warning: no previous prototype for function '__arm64_sys_msync' [-Wmissing-prototypes]
   COND_SYSCALL(msync);
   ^
   arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                                  ^
   <scratch space>:56:1: note: expanded from here
   __arm64_sys_msync
   ^
   kernel/sys_ni.c:289:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                      ^
   kernel/sys_ni.c:290:1: warning: no previous prototype for function '__arm64_sys_mlock' [-Wmissing-prototypes]
   COND_SYSCALL(mlock);
   ^
   arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                                  ^
   <scratch space>:57:1: note: expanded from here
   __arm64_sys_mlock
   ^
   kernel/sys_ni.c:290:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   arch/arm64/include/asm/syscall_wrapper.h:76:13: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                      ^
   kernel/sys_ni.c:291:1: warning: no previous prototype for function '__arm64_sys_munlock' [-Wmissing-prototypes]
   COND_SYSCALL(munlock);
   ^
   arch/arm64/include/asm/syscall_wrapper.h:76:25: note: expanded from macro 'COND_SYSCALL'
           asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
                                  ^
   <scratch space>:58:1: note: expanded from here
   __arm64_sys_munlock
   ^
   kernel/sys_ni.c:291:1: note: declare 'static' if the function is not intended to be used outside of this translation unit


vim +/__arm64_sys_umcg_ctl +277 kernel/sys_ni.c

   275	
   276	/* kernel/sched/umcg.c */
 > 277	COND_SYSCALL(umcg_ctl);
 > 278	COND_SYSCALL(umcg_wait);
   279	

---
0-DAY CI Kernel Test Service, Intel Corporation
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