tree: https://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-misc.git lto-5.7-2 head: 8b6fa2174c4f82a1641d894ef53fc8b5a1d4031e commit: 9a098db5a93b27ae0b3819c498c6b747f9a4a481 [11/29] lto: Use C version for SYSCALL_ALIAS / cond_syscall config: c6x-allnoconfig (attached as .config) compiler: c6x-elf-gcc (GCC) 9.3.0 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 checkout 9a098db5a93b27ae0b3819c498c6b747f9a4a481 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=c6x If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): kernel/time/posix-stubs.c:25:17: warning: no previous prototype for 'sys_ni_posix_timers' [-Wmissing-prototypes] 25 | asmlinkage long sys_ni_posix_timers(void) | ^~~~~~~~~~~~~~~~~~~ In file included from kernel/time/posix-stubs.c:9: 34 | #define SYS_NI(name) SYSCALL_ALIAS(sys_##name, sys_ni_posix_timers) | ^~~~ include/linux/linkage.h:32:7: note: in definition of macro 'SYSCALL_ALIAS' 32 | long a(void) __attribute__((alias(__stringify(name)))) | ^ kernel/time/posix-stubs.c:41:1: note: in expansion of macro 'SYS_NI' 41 | SYS_NI(timer_create); | ^~~~~~ In file included from kernel/time/posix-stubs.c:13: include/linux/syscalls.h:613:17: note: previous declaration of 'sys_timer_create' was here 613 | asmlinkage long sys_timer_create(clockid_t which_clock, | ^~~~~~~~~~~~~~~~ In file included from kernel/time/posix-stubs.c:9: 34 | #define SYS_NI(name) SYSCALL_ALIAS(sys_##name, sys_ni_posix_timers) | ^~~~ include/linux/linkage.h:32:7: note: in definition of macro 'SYSCALL_ALIAS' 32 | long a(void) __attribute__((alias(__stringify(name)))) | ^ kernel/time/posix-stubs.c:42:1: note: in expansion of macro 'SYS_NI' 42 | SYS_NI(timer_gettime); | ^~~~~~ In file included from kernel/time/posix-stubs.c:13: include/linux/syscalls.h:616:17: note: previous declaration of 'sys_timer_gettime' was here 616 | asmlinkage long sys_timer_gettime(timer_t timer_id, | ^~~~~~~~~~~~~~~~~ In file included from kernel/time/posix-stubs.c:9: 34 | #define SYS_NI(name) SYSCALL_ALIAS(sys_##name, sys_ni_posix_timers) | ^~~~ include/linux/linkage.h:32:7: note: in definition of macro 'SYSCALL_ALIAS' 32 | long a(void) __attribute__((alias(__stringify(name)))) | ^ kernel/time/posix-stubs.c:43:1: note: in expansion of macro 'SYS_NI' 43 | SYS_NI(timer_getoverrun); | ^~~~~~ In file included from kernel/time/posix-stubs.c:13: include/linux/syscalls.h:618:17: note: previous declaration of 'sys_timer_getoverrun' was here 618 | asmlinkage long sys_timer_getoverrun(timer_t timer_id); | ^~~~~~~~~~~~~~~~~~~~ In file included from kernel/time/posix-stubs.c:9: 34 | #define SYS_NI(name) SYSCALL_ALIAS(sys_##name, sys_ni_posix_timers) | ^~~~ include/linux/linkage.h:32:7: note: in definition of macro 'SYSCALL_ALIAS' 32 | long a(void) __attribute__((alias(__stringify(name)))) | ^ kernel/time/posix-stubs.c:44:1: note: in expansion of macro 'SYS_NI' 44 | SYS_NI(timer_settime); | ^~~~~~ In file included from kernel/time/posix-stubs.c:13: include/linux/syscalls.h:619:17: note: previous declaration of 'sys_timer_settime' was here 619 | asmlinkage long sys_timer_settime(timer_t timer_id, int flags, | ^~~~~~~~~~~~~~~~~ In file included from kernel/time/posix-stubs.c:9: 34 | #define SYS_NI(name) SYSCALL_ALIAS(sys_##name, sys_ni_posix_timers) | ^~~~ include/linux/linkage.h:32:7: note: in definition of macro 'SYSCALL_ALIAS' 32 | long a(void) __attribute__((alias(__stringify(name)))) | ^ kernel/time/posix-stubs.c:45:1: note: in expansion of macro 'SYS_NI' 45 | SYS_NI(timer_delete); | ^~~~~~ In file included from kernel/time/posix-stubs.c:13: include/linux/syscalls.h:622:17: note: previous declaration of 'sys_timer_delete' was here 622 | asmlinkage long sys_timer_delete(timer_t timer_id); | ^~~~~~~~~~~~~~~~ In file included from kernel/time/posix-stubs.c:9: 34 | #define SYS_NI(name) SYSCALL_ALIAS(sys_##name, sys_ni_posix_timers) | ^~~~ include/linux/linkage.h:32:7: note: in definition of macro 'SYSCALL_ALIAS' 32 | long a(void) __attribute__((alias(__stringify(name)))) | ^ kernel/time/posix-stubs.c:46:1: note: in expansion of macro 'SYS_NI' 46 | SYS_NI(clock_adjtime); | ^~~~~~ In file included from kernel/time/posix-stubs.c:13: include/linux/syscalls.h:930:17: note: previous declaration of 'sys_clock_adjtime' was here 930 | asmlinkage long sys_clock_adjtime(clockid_t which_clock, | ^~~~~~~~~~~~~~~~~ In file included from kernel/time/posix-stubs.c:9: 34 | #define SYS_NI(name) SYSCALL_ALIAS(sys_##name, sys_ni_posix_timers) | ^~~~ include/linux/linkage.h:32:7: note: in definition of macro 'SYSCALL_ALIAS' 32 | long a(void) __attribute__((alias(__stringify(name)))) | ^ kernel/time/posix-stubs.c:47:1: note: in expansion of macro 'SYS_NI' 47 | SYS_NI(getitimer); | ^~~~~~ In file included from kernel/time/posix-stubs.c:13: include/linux/syscalls.h:596:17: note: previous declaration of 'sys_getitimer' was here 596 | asmlinkage long sys_getitimer(int which, struct __kernel_old_itimerval __user *value); | ^~~~~~~~~~~~~ In file included from kernel/time/posix-stubs.c:9: 34 | #define SYS_NI(name) SYSCALL_ALIAS(sys_##name, sys_ni_posix_timers) | ^~~~ include/linux/linkage.h:32:7: note: in definition of macro 'SYSCALL_ALIAS' 32 | long a(void) __attribute__((alias(__stringify(name)))) | ^ kernel/time/posix-stubs.c:48:1: note: in expansion of macro 'SYS_NI' 48 | SYS_NI(setitimer); | ^~~~~~ In file included from kernel/time/posix-stubs.c:13: include/linux/syscalls.h:597:17: note: previous declaration of 'sys_setitimer' was here 597 | asmlinkage long sys_setitimer(int which, | ^~~~~~~~~~~~~ In file included from kernel/time/posix-stubs.c:9: 34 | #define SYS_NI(name) SYSCALL_ALIAS(sys_##name, sys_ni_posix_timers) | ^~~~ include/linux/linkage.h:32:7: note: in definition of macro 'SYSCALL_ALIAS' 32 | long a(void) __attribute__((alias(__stringify(name)))) | ^ kernel/time/posix-stubs.c:49:1: note: in expansion of macro 'SYS_NI' 49 | SYS_NI(clock_adjtime32); | ^~~~~~ In file included from kernel/time/posix-stubs.c:13: include/linux/syscalls.h:932:17: note: previous declaration of 'sys_clock_adjtime32' was here 932 | asmlinkage long sys_clock_adjtime32(clockid_t which_clock, | ^~~~~~~~~~~~~~~~~~~ kernel/time/posix-stubs.c:73:5: warning: no previous prototype for 'do_clock_gettime' [-Wmissing-prototypes] 73 | int do_clock_gettime(clockid_t which_clock, struct timespec64 *tp) | ^~~~~~~~~~~~~~~~ vim +/sys_timer_create +34 kernel/time/posix-stubs.c baa73d9e478ff3 Nicolas Pitre 2016-11-11 32 7303e30ec1d8fb Dominik Brodowski 2018-04-05 33 #ifndef SYS_NI baa73d9e478ff3 Nicolas Pitre 2016-11-11 @34 #define SYS_NI(name) SYSCALL_ALIAS(sys_##name, sys_ni_posix_timers) 7303e30ec1d8fb Dominik Brodowski 2018-04-05 35 #endif 7303e30ec1d8fb Dominik Brodowski 2018-04-05 36 :::::: The code at line 34 was first introduced by commit :::::: baa73d9e478ff32d62f3f9422822b59dd9a95a21 posix-timers: Make them configurable :::::: TO: Nicolas Pitre <nicolas.pitre(a)linaro.org&gt; :::::: CC: Thomas Gleixner <tglx(a)linutronix.de&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org