tree: https://android.googlesource.com/kernel/common android12-5.4 head: 2cdbd9b441724f56f305dd479d3e54710d50e8e7 commit: c4d3c4ac7919d73354edf72e9b236d6e27977f6f [15107/19168] ANDROID: syscalls/x86: use a weak function for IA32 compat syscalls config: x86_64-randconfig-r034-20211118 (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 git remote add android-common https://android.googlesource.com/kernel/common git fetch --no-tags android-common android12-5.4 git checkout c4d3c4ac7919d73354edf72e9b236d6e27977f6f # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): asmlinkage __weak long __ia32_sys_##name(const struct pt_regs *__unused)\ ^ <scratch space>:145:1: note: expanded from here __ia32_sys_pciconfig_read ^ kernel/sys_ni.c:359:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/x86/include/asm/syscall_wrapper.h:74:20: note: expanded from macro 'COND_SYSCALL' asmlinkage __weak long __ia32_sys_##name(const struct pt_regs *__unused)\ ^ kernel/sys_ni.c:360:1: warning: no previous prototype for function '__x64_sys_pciconfig_write' [-Wmissing-prototypes] COND_SYSCALL(pciconfig_write); ^ arch/x86/include/asm/syscall_wrapper.h:70:25: note: expanded from macro 'COND_SYSCALL' asmlinkage __weak long __x64_sys_##name(const struct pt_regs *__unused) \ ^ <scratch space>:146:1: note: expanded from here __x64_sys_pciconfig_write ^ kernel/sys_ni.c:360:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/x86/include/asm/syscall_wrapper.h:70:20: note: expanded from macro 'COND_SYSCALL' asmlinkage __weak long __x64_sys_##name(const struct pt_regs *__unused) \ ^ kernel/sys_ni.c:360:1: warning: no previous prototype for function '__ia32_sys_pciconfig_write' [-Wmissing-prototypes] COND_SYSCALL(pciconfig_write); ^ arch/x86/include/asm/syscall_wrapper.h:74:25: note: expanded from macro 'COND_SYSCALL' asmlinkage __weak long __ia32_sys_##name(const struct pt_regs *__unused)\ ^ <scratch space>:147:1: note: expanded from here __ia32_sys_pciconfig_write ^ kernel/sys_ni.c:360:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/x86/include/asm/syscall_wrapper.h:74:20: note: expanded from macro 'COND_SYSCALL' asmlinkage __weak long __ia32_sys_##name(const struct pt_regs *__unused)\ ^ kernel/sys_ni.c:361:1: warning: no previous prototype for function '__x64_sys_pciconfig_iobase' [-Wmissing-prototypes] COND_SYSCALL(pciconfig_iobase); ^ arch/x86/include/asm/syscall_wrapper.h:70:25: note: expanded from macro 'COND_SYSCALL' asmlinkage __weak long __x64_sys_##name(const struct pt_regs *__unused) \ ^ <scratch space>:148:1: note: expanded from here __x64_sys_pciconfig_iobase ^ kernel/sys_ni.c:361:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/x86/include/asm/syscall_wrapper.h:70:20: note: expanded from macro 'COND_SYSCALL' asmlinkage __weak long __x64_sys_##name(const struct pt_regs *__unused) \ ^ kernel/sys_ni.c:361:1: warning: no previous prototype for function '__ia32_sys_pciconfig_iobase' [-Wmissing-prototypes] COND_SYSCALL(pciconfig_iobase); ^ arch/x86/include/asm/syscall_wrapper.h:74:25: note: expanded from macro 'COND_SYSCALL' asmlinkage __weak long __ia32_sys_##name(const struct pt_regs *__unused)\ ^ <scratch space>:149:1: note: expanded from here __ia32_sys_pciconfig_iobase ^ kernel/sys_ni.c:361:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/x86/include/asm/syscall_wrapper.h:74:20: note: expanded from macro 'COND_SYSCALL' asmlinkage __weak long __ia32_sys_##name(const struct pt_regs *__unused)\ ^ kernel/sys_ni.c:364:1: warning: no previous prototype for function '__x64_sys_socketcall' [-Wmissing-prototypes] COND_SYSCALL(socketcall); ^ arch/x86/include/asm/syscall_wrapper.h:70:25: note: expanded from macro 'COND_SYSCALL' asmlinkage __weak long __x64_sys_##name(const struct pt_regs *__unused) \ ^ <scratch space>:150:1: note: expanded from here __x64_sys_socketcall ^ kernel/sys_ni.c:364:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/x86/include/asm/syscall_wrapper.h:70:20: note: expanded from macro 'COND_SYSCALL' asmlinkage __weak long __x64_sys_##name(const struct pt_regs *__unused) \ ^ kernel/sys_ni.c:364:1: warning: no previous prototype for function '__ia32_sys_socketcall' [-Wmissing-prototypes] COND_SYSCALL(socketcall); ^ arch/x86/include/asm/syscall_wrapper.h:74:25: note: expanded from macro 'COND_SYSCALL' asmlinkage __weak long __ia32_sys_##name(const struct pt_regs *__unused)\ ^ <scratch space>:151:1: note: expanded from here __ia32_sys_socketcall ^ kernel/sys_ni.c:364:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/x86/include/asm/syscall_wrapper.h:74:20: note: expanded from macro 'COND_SYSCALL' asmlinkage __weak long __ia32_sys_##name(const struct pt_regs *__unused)\ ^ kernel/sys_ni.c:365:1: warning: no previous prototype for function '__ia32_compat_sys_socketcall' [-Wmissing-prototypes] COND_SYSCALL_COMPAT(socketcall); ^ arch/x86/include/asm/syscall_wrapper.h:151:25: note: expanded from macro 'COND_SYSCALL_COMPAT' asmlinkage __weak long __ia32_compat_sys_##name( \ ^ <scratch space>:152:1: note: expanded from here __ia32_compat_sys_socketcall ^ kernel/sys_ni.c:365:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/x86/include/asm/syscall_wrapper.h:151:20: note: expanded from macro 'COND_SYSCALL_COMPAT' asmlinkage __weak long __ia32_compat_sys_##name( \ ^ COND_SYSCALL_COMPAT(sysctl); ^ arch/x86/include/asm/syscall_wrapper.h:151:25: note: expanded from macro 'COND_SYSCALL_COMPAT' asmlinkage __weak long __ia32_compat_sys_##name( \ ^ <scratch space>:157:1: note: expanded from here __ia32_compat_sys_sysctl ^ kernel/sys_ni.c:368:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/x86/include/asm/syscall_wrapper.h:151:20: note: expanded from macro 'COND_SYSCALL_COMPAT' asmlinkage __weak long __ia32_compat_sys_##name( \ ^ kernel/sys_ni.c:369:1: warning: no previous prototype for function '__ia32_compat_sys_fanotify_mark' [-Wmissing-prototypes] COND_SYSCALL_COMPAT(fanotify_mark); ^ arch/x86/include/asm/syscall_wrapper.h:151:25: note: expanded from macro 'COND_SYSCALL_COMPAT' asmlinkage __weak long __ia32_compat_sys_##name( \ ^ <scratch space>:5:1: note: expanded from here __ia32_compat_sys_fanotify_mark ^ kernel/sys_ni.c:369:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/x86/include/asm/syscall_wrapper.h:151:20: note: expanded from macro 'COND_SYSCALL_COMPAT' asmlinkage __weak long __ia32_compat_sys_##name( \ ^ kernel/sys_ni.c:372:1: warning: no previous prototype for function '__x64_sys_vm86old' [-Wmissing-prototypes] COND_SYSCALL(vm86old); ^ arch/x86/include/asm/syscall_wrapper.h:70:25: note: expanded from macro 'COND_SYSCALL' asmlinkage __weak long __x64_sys_##name(const struct pt_regs *__unused) \ ^ <scratch space>:10:1: note: expanded from here __x64_sys_vm86old ^ kernel/sys_ni.c:372:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/x86/include/asm/syscall_wrapper.h:70:20: note: expanded from macro 'COND_SYSCALL' asmlinkage __weak long __x64_sys_##name(const struct pt_regs *__unused) \ ^ kernel/sys_ni.c:372:1: warning: no previous prototype for function '__ia32_sys_vm86old' [-Wmissing-prototypes] COND_SYSCALL(vm86old); ^ arch/x86/include/asm/syscall_wrapper.h:74:25: note: expanded from macro 'COND_SYSCALL' asmlinkage __weak long __ia32_sys_##name(const struct pt_regs *__unused)\ ^ <scratch space>:11:1: note: expanded from here __ia32_sys_vm86old ^ kernel/sys_ni.c:372:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/x86/include/asm/syscall_wrapper.h:74:20: note: expanded from macro 'COND_SYSCALL' asmlinkage __weak long __ia32_sys_##name(const struct pt_regs *__unused)\ ^ kernel/sys_ni.c:373:1: warning: no previous prototype for function '__x64_sys_modify_ldt' [-Wmissing-prototypes] COND_SYSCALL(modify_ldt); ^ arch/x86/include/asm/syscall_wrapper.h:70:25: note: expanded from macro 'COND_SYSCALL' asmlinkage __weak long __x64_sys_##name(const struct pt_regs *__unused) \ ^ <scratch space>:12:1: note: expanded from here __x64_sys_modify_ldt ^ kernel/sys_ni.c:373:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/x86/include/asm/syscall_wrapper.h:70:20: note: expanded from macro 'COND_SYSCALL' asmlinkage __weak long __x64_sys_##name(const struct pt_regs *__unused) \ ^ kernel/sys_ni.c:373:1: warning: no previous prototype for function '__ia32_sys_modify_ldt' [-Wmissing-prototypes] COND_SYSCALL(modify_ldt); ^ arch/x86/include/asm/syscall_wrapper.h:74:25: note: expanded from macro 'COND_SYSCALL' asmlinkage __weak long __ia32_sys_##name(const struct pt_regs *__unused)\ ^ <scratch space>:13:1: note: expanded from here __ia32_sys_modify_ldt ^ kernel/sys_ni.c:373:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/x86/include/asm/syscall_wrapper.h:74:20: note: expanded from macro 'COND_SYSCALL' asmlinkage __weak long __ia32_sys_##name(const struct pt_regs *__unused)\ ^ kernel/sys_ni.c:374:1: warning: no previous prototype for function '__ia32_compat_sys_quotactl32' [-Wmissing-prototypes] COND_SYSCALL_COMPAT(quotactl32); ^ arch/x86/include/asm/syscall_wrapper.h:151:25: note: expanded from macro 'COND_SYSCALL_COMPAT' asmlinkage __weak long __ia32_compat_sys_##name( \ ^ <scratch space>:14:1: note: expanded from here __ia32_compat_sys_quotactl32 ^ kernel/sys_ni.c:374:1: note: declare 'static' if the function is not intended to be used outside of this translation unit arch/x86/include/asm/syscall_wrapper.h:151:20: note: expanded from macro 'COND_SYSCALL_COMPAT' asmlinkage __weak long __ia32_compat_sys_##name( \ ^ kernel/sys_ni.c:375:1: warning: no previous prototype for function '__x64_sys_vm86' [-Wmissing-prototypes] COND_SYSCALL(vm86); ^ arch/x86/include/asm/syscall_wrapper.h:70:25: note: expanded from macro 'COND_SYSCALL' asmlinkage __weak long __x64_sys_##name(const struct pt_regs *__unused) \ ^ <scratch space>:19:1: note: expanded from here __x64_sys_vm86 ^ kernel/sys_ni.c:375:1: note: declare 'static' if the function is not intended to be used outside of this translation unit vim +/__ia32_compat_sys_sysctl +368 kernel/sys_ni.c 70dd4b3160798b6 Dominik Brodowski 2018-03-06 366 70dd4b3160798b6 Dominik Brodowski 2018-03-06 367 /* compat syscalls for arm64, x86, ... */ 67a7acd3773a94d Dominik Brodowski 2018-03-04 @368 COND_SYSCALL_COMPAT(sysctl); 67a7acd3773a94d Dominik Brodowski 2018-03-04 369 COND_SYSCALL_COMPAT(fanotify_mark); 70dd4b3160798b6 Dominik Brodowski 2018-03-06 370 :::::: The code at line 368 was first introduced by commit :::::: 67a7acd3773a94df2e671601a288685485463cf9 kernel/sys_ni: remove {sys_,sys_compat} from cond_syscall definitions :::::: TO: Dominik Brodowski <linux(a)dominikbrodowski.net&gt; :::::: CC: Dominik Brodowski <linux(a)dominikbrodowski.net&gt; 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