[kbuild-all] arch/nds32/kernel/vdso/gettimeofday.c:246:13: error: no previous prototype for '__vdso_gettimeofday'

Hi Stephen, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: d2f38a3c6507b2520101f9a3807ed98f1bdc545a commit: 20fbb11fe4ea99e02d77824613f1438bea456683 don't make the syscall checking produce errors from warnings date: 9 weeks ago config: nds32-allyesconfig (attached as .config) compiler: nds32le-linux-gcc (GCC) 11.2.0 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 # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 20fbb11fe4ea99e02d77824613f1438bea456683 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=nds32 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 >>): <stdin>:1515:2: warning: #warning syscall clone3 not implemented [-Wcpp] arch/nds32/kernel/vdso/gettimeofday.c:158:13: error: no previous prototype for '__vdso_clock_gettime' [-Werror=missing-prototypes] 158 | notrace int __vdso_clock_gettime(clockid_t clkid, struct __kernel_old_timespec *ts) | ^~~~~~~~~~~~~~~~~~~~ arch/nds32/kernel/vdso/gettimeofday.c:206:13: error: no previous prototype for '__vdso_clock_getres' [-Werror=missing-prototypes] 206 | notrace int __vdso_clock_getres(clockid_t clk_id, struct __kernel_old_timespec *res) | ^~~~~~~~~~~~~~~~~~~ 246 | notrace int __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz) | ^~~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors make[2]: *** [scripts/Makefile.build:277: arch/nds32/kernel/vdso/gettimeofday.o] Error 1 make[2]: Target 'include/generated/vdso-offsets.h' not remade because of errors. make[1]: *** [arch/nds32/Makefile:63: vdso_prepare] Error 2 make[1]: Target 'prepare' not remade because of errors. make: *** [Makefile:219: __sub-make] Error 2 make: Target 'prepare' not remade because of errors. vim +/__vdso_gettimeofday +246 arch/nds32/kernel/vdso/gettimeofday.c eefacd1dfe38a3 Greentime Hu 2017-10-25 157 82210fc778982d Arnd Bergmann 2019-10-27 @158 notrace int __vdso_clock_gettime(clockid_t clkid, struct __kernel_old_timespec *ts) eefacd1dfe38a3 Greentime Hu 2017-10-25 159 { eefacd1dfe38a3 Greentime Hu 2017-10-25 160 struct vdso_data *vdata; eefacd1dfe38a3 Greentime Hu 2017-10-25 161 int ret = -1; eefacd1dfe38a3 Greentime Hu 2017-10-25 162 eefacd1dfe38a3 Greentime Hu 2017-10-25 163 vdata = __get_datapage(); eefacd1dfe38a3 Greentime Hu 2017-10-25 164 if (vdata->cycle_count_offset == EMPTY_REG_OFFSET) eefacd1dfe38a3 Greentime Hu 2017-10-25 165 return clock_gettime_fallback(clkid, ts); eefacd1dfe38a3 Greentime Hu 2017-10-25 166 eefacd1dfe38a3 Greentime Hu 2017-10-25 167 switch (clkid) { eefacd1dfe38a3 Greentime Hu 2017-10-25 168 case CLOCK_REALTIME_COARSE: eefacd1dfe38a3 Greentime Hu 2017-10-25 169 ret = do_realtime_coarse(ts, vdata); eefacd1dfe38a3 Greentime Hu 2017-10-25 170 break; eefacd1dfe38a3 Greentime Hu 2017-10-25 171 case CLOCK_MONOTONIC_COARSE: eefacd1dfe38a3 Greentime Hu 2017-10-25 172 ret = do_monotonic_coarse(ts, vdata); eefacd1dfe38a3 Greentime Hu 2017-10-25 173 break; eefacd1dfe38a3 Greentime Hu 2017-10-25 174 case CLOCK_REALTIME: eefacd1dfe38a3 Greentime Hu 2017-10-25 175 ret = do_realtime(ts, vdata); eefacd1dfe38a3 Greentime Hu 2017-10-25 176 break; eefacd1dfe38a3 Greentime Hu 2017-10-25 177 case CLOCK_MONOTONIC: eefacd1dfe38a3 Greentime Hu 2017-10-25 178 ret = do_monotonic(ts, vdata); eefacd1dfe38a3 Greentime Hu 2017-10-25 179 break; eefacd1dfe38a3 Greentime Hu 2017-10-25 180 default: eefacd1dfe38a3 Greentime Hu 2017-10-25 181 break; eefacd1dfe38a3 Greentime Hu 2017-10-25 182 } eefacd1dfe38a3 Greentime Hu 2017-10-25 183 eefacd1dfe38a3 Greentime Hu 2017-10-25 184 if (ret) eefacd1dfe38a3 Greentime Hu 2017-10-25 185 ret = clock_gettime_fallback(clkid, ts); eefacd1dfe38a3 Greentime Hu 2017-10-25 186 eefacd1dfe38a3 Greentime Hu 2017-10-25 187 return ret; eefacd1dfe38a3 Greentime Hu 2017-10-25 188 } eefacd1dfe38a3 Greentime Hu 2017-10-25 189 eefacd1dfe38a3 Greentime Hu 2017-10-25 190 static notrace int clock_getres_fallback(clockid_t _clk_id, 82210fc778982d Arnd Bergmann 2019-10-27 191 struct __kernel_old_timespec *_res) eefacd1dfe38a3 Greentime Hu 2017-10-25 192 { eefacd1dfe38a3 Greentime Hu 2017-10-25 193 register clockid_t clk_id asm("$r0") = _clk_id; 82210fc778982d Arnd Bergmann 2019-10-27 194 register struct __kernel_old_timespec *res asm("$r1") = _res; eefacd1dfe38a3 Greentime Hu 2017-10-25 195 register int ret asm("$r0"); eefacd1dfe38a3 Greentime Hu 2017-10-25 196 eefacd1dfe38a3 Greentime Hu 2017-10-25 197 asm volatile ("movi $r15, %3\n" eefacd1dfe38a3 Greentime Hu 2017-10-25 198 "syscall 0x0\n" eefacd1dfe38a3 Greentime Hu 2017-10-25 199 :"=r" (ret) eefacd1dfe38a3 Greentime Hu 2017-10-25 200 :"r"(clk_id), "r"(res), "i"(__NR_clock_getres) eefacd1dfe38a3 Greentime Hu 2017-10-25 201 :"$r15", "memory"); eefacd1dfe38a3 Greentime Hu 2017-10-25 202 eefacd1dfe38a3 Greentime Hu 2017-10-25 203 return ret; eefacd1dfe38a3 Greentime Hu 2017-10-25 204 } eefacd1dfe38a3 Greentime Hu 2017-10-25 205 82210fc778982d Arnd Bergmann 2019-10-27 206 notrace int __vdso_clock_getres(clockid_t clk_id, struct __kernel_old_timespec *res) eefacd1dfe38a3 Greentime Hu 2017-10-25 207 { af9abd65983cf3 Vincenzo Frascino 2019-04-01 208 struct vdso_data *vdata = __get_datapage(); af9abd65983cf3 Vincenzo Frascino 2019-04-01 209 eefacd1dfe38a3 Greentime Hu 2017-10-25 210 if (res == NULL) eefacd1dfe38a3 Greentime Hu 2017-10-25 211 return 0; eefacd1dfe38a3 Greentime Hu 2017-10-25 212 switch (clk_id) { eefacd1dfe38a3 Greentime Hu 2017-10-25 213 case CLOCK_REALTIME: eefacd1dfe38a3 Greentime Hu 2017-10-25 214 case CLOCK_MONOTONIC: eefacd1dfe38a3 Greentime Hu 2017-10-25 215 case CLOCK_MONOTONIC_RAW: eefacd1dfe38a3 Greentime Hu 2017-10-25 216 res->tv_sec = 0; af9abd65983cf3 Vincenzo Frascino 2019-04-01 217 res->tv_nsec = vdata->hrtimer_res; eefacd1dfe38a3 Greentime Hu 2017-10-25 218 break; eefacd1dfe38a3 Greentime Hu 2017-10-25 219 case CLOCK_REALTIME_COARSE: eefacd1dfe38a3 Greentime Hu 2017-10-25 220 case CLOCK_MONOTONIC_COARSE: eefacd1dfe38a3 Greentime Hu 2017-10-25 221 res->tv_sec = 0; eefacd1dfe38a3 Greentime Hu 2017-10-25 222 res->tv_nsec = CLOCK_COARSE_RES; eefacd1dfe38a3 Greentime Hu 2017-10-25 223 break; eefacd1dfe38a3 Greentime Hu 2017-10-25 224 default: eefacd1dfe38a3 Greentime Hu 2017-10-25 225 return clock_getres_fallback(clk_id, res); eefacd1dfe38a3 Greentime Hu 2017-10-25 226 } eefacd1dfe38a3 Greentime Hu 2017-10-25 227 return 0; eefacd1dfe38a3 Greentime Hu 2017-10-25 228 } eefacd1dfe38a3 Greentime Hu 2017-10-25 229 ddccf40fe82b7a Arnd Bergmann 2017-11-23 230 static notrace inline int gettimeofday_fallback(struct __kernel_old_timeval *_tv, eefacd1dfe38a3 Greentime Hu 2017-10-25 231 struct timezone *_tz) eefacd1dfe38a3 Greentime Hu 2017-10-25 232 { ddccf40fe82b7a Arnd Bergmann 2017-11-23 233 register struct __kernel_old_timeval *tv asm("$r0") = _tv; eefacd1dfe38a3 Greentime Hu 2017-10-25 234 register struct timezone *tz asm("$r1") = _tz; eefacd1dfe38a3 Greentime Hu 2017-10-25 235 register int ret asm("$r0"); eefacd1dfe38a3 Greentime Hu 2017-10-25 236 eefacd1dfe38a3 Greentime Hu 2017-10-25 237 asm volatile ("movi $r15, %3\n" eefacd1dfe38a3 Greentime Hu 2017-10-25 238 "syscall 0x0\n" eefacd1dfe38a3 Greentime Hu 2017-10-25 239 :"=r" (ret) eefacd1dfe38a3 Greentime Hu 2017-10-25 240 :"r"(tv), "r"(tz), "i"(__NR_gettimeofday) eefacd1dfe38a3 Greentime Hu 2017-10-25 241 :"$r15", "memory"); eefacd1dfe38a3 Greentime Hu 2017-10-25 242 eefacd1dfe38a3 Greentime Hu 2017-10-25 243 return ret; eefacd1dfe38a3 Greentime Hu 2017-10-25 244 } eefacd1dfe38a3 Greentime Hu 2017-10-25 245 ddccf40fe82b7a Arnd Bergmann 2017-11-23 @246 notrace int __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz) :::::: The code at line 246 was first introduced by commit :::::: ddccf40fe82b7ac7c44b186ec4b6d1d1bbc2cbff y2038: vdso: change timeval to __kernel_old_timeval :::::: TO: Arnd Bergmann <arnd(a)arndb.de&gt; :::::: CC: Arnd Bergmann <arnd(a)arndb.de&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org