tree:   https://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security.git landlock_lsm
head:   f642729df39003efe2a9bfa341a95759d712eb35
commit: c5eafae25eb54cc5354f0675a88a34f03c08f559 [8/12] landlock: Add syscall implementations
config: x86_64-randconfig-r004-20210318 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project fcc1ce00931751ac02498986feb37744e9ace8de)
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://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security.git/commit/?id=c5eafae25eb54cc5354f0675a88a34f03c08f559
        git remote add security https://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security.git
        git fetch --no-tags security landlock_lsm
        git checkout c5eafae25eb54cc5354f0675a88a34f03c08f559
        # 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:265:1: warning: no previous prototype for function '__ia32_sys_request_key' [-Wmissing-prototypes]
   COND_SYSCALL(request_key);
   ^
   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>:23:1: note: expanded from here
   __ia32_sys_request_key
   ^
   kernel/sys_ni.c:265:1: 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:266:1: warning: no previous prototype for function '__x64_sys_keyctl' [-Wmissing-prototypes]
   COND_SYSCALL(keyctl);
   ^
   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>:27:1: note: expanded from here
   __x64_sys_keyctl
   ^
   kernel/sys_ni.c:266:1: 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:266:1: warning: no previous prototype for function '__ia32_sys_keyctl' [-Wmissing-prototypes]
   COND_SYSCALL(keyctl);
   ^
   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>:31:1: note: expanded from here
   __ia32_sys_keyctl
   ^
   kernel/sys_ni.c:266:1: 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:267:1: warning: no previous prototype for function '__ia32_compat_sys_keyctl' [-Wmissing-prototypes]
   COND_SYSCALL_COMPAT(keyctl);
   ^
   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>:35:1: note: expanded from here
   __ia32_compat_sys_keyctl
   ^
   kernel/sys_ni.c:267:1: 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:270:1: warning: no previous prototype for function '__x64_sys_landlock_create_ruleset' [-Wmissing-prototypes]
   COND_SYSCALL(landlock_create_ruleset);
   ^
   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>:39:1: note: expanded from here
   __x64_sys_landlock_create_ruleset
   ^
   kernel/sys_ni.c:270:1: 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:270:1: warning: no previous prototype for function '__ia32_sys_landlock_create_ruleset' [-Wmissing-prototypes]
   COND_SYSCALL(landlock_create_ruleset);
   ^
   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>:43:1: note: expanded from here
   __ia32_sys_landlock_create_ruleset
   ^
   kernel/sys_ni.c:270:1: 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:271:1: warning: no previous prototype for function '__x64_sys_landlock_add_rule' [-Wmissing-prototypes]
   COND_SYSCALL(landlock_add_rule);
   ^
   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>:47:1: note: expanded from here
   __x64_sys_landlock_add_rule
   ^
   kernel/sys_ni.c:271:1: 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:271:1: warning: no previous prototype for function '__ia32_sys_landlock_add_rule' [-Wmissing-prototypes]
   COND_SYSCALL(landlock_add_rule);
   ^
   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>:51:1: note: expanded from here
   __ia32_sys_landlock_add_rule
   ^
   kernel/sys_ni.c:271:1: 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:272:1: warning: no previous prototype for function '__x64_sys_landlock_restrict_self' [-Wmissing-prototypes]
   COND_SYSCALL(landlock_restrict_self);
   ^
   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>:55:1: note: expanded from here
   __x64_sys_landlock_restrict_self
   ^
   kernel/sys_ni.c:272:1: 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:272:1: warning: no previous prototype for function '__ia32_sys_landlock_restrict_self' [-Wmissing-prototypes]
   COND_SYSCALL(landlock_restrict_self);
   ^
   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>:59:1: note: expanded from here
   __ia32_sys_landlock_restrict_self
   ^
   kernel/sys_ni.c:272:1: 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:277:1: warning: no previous prototype for function '__x64_sys_fadvise64_64' [-Wmissing-prototypes]
   COND_SYSCALL(fadvise64_64);
   ^
   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>:63:1: note: expanded from here
   __x64_sys_fadvise64_64
   ^
   kernel/sys_ni.c:277:1: 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:277:1: warning: no previous prototype for function '__ia32_sys_fadvise64_64' [-Wmissing-prototypes]
   COND_SYSCALL(fadvise64_64);
   ^
   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>:67:1: note: expanded from here
   __ia32_sys_fadvise64_64
   ^
   kernel/sys_ni.c:277:1: 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:280:1: warning: no previous prototype for function '__x64_sys_swapon' [-Wmissing-prototypes]
   COND_SYSCALL(swapon);
   ^
   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>:71:1: note: expanded from here
   __x64_sys_swapon
   ^
   kernel/sys_ni.c:280:1: 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:280:1: warning: no previous prototype for function '__ia32_sys_swapon' [-Wmissing-prototypes]


vim +/__x64_sys_landlock_create_ruleset +270 kernel/sys_ni.c

   268	
   269	/* security/landlock/syscalls.c */
 > 270	COND_SYSCALL(landlock_create_ruleset);
 > 271	COND_SYSCALL(landlock_add_rule);
 > 272	COND_SYSCALL(landlock_restrict_self);
   273	

---
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