[kbuild-all] [vfs:work.regset 9/9] arch/s390/kernel/ptrace.c:1306:11: error: initialization of 'int (*)(struct task_struct *, const struct user_regset *, struct membuf)' from incompatible pointer type 'int (*)(struct task_struct *, const struct user_regset *, unsigned int, struct membuf)'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git work.regset head: 53a620bc6368a2da4a4c0c699b76f0bf1b4205e7 commit: 53a620bc6368a2da4a4c0c699b76f0bf1b4205e7 [9/9] s390: switch to ->get2() config: s390-randconfig-r034-20200513 (attached as .config) compiler: s390-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 53a620bc6368a2da4a4c0c699b76f0bf1b4205e7 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=s390 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): 1306 | .get2 = s390_fpregs_get, | ^~~~~~~~~~~~~~~ arch/s390/kernel/ptrace.c:1306:11: note: (near initialization for 's390_regsets[1].get2') arch/s390/kernel/ptrace.c: In function 's390_compat_regs_high_get': 1441 | for (i = 0; n < NUM_GPRS; i++, gprs_high += 2) | ^ arch/s390/kernel/ptrace.c:1441:14: note: each undeclared identifier is reported only once for each function it appears in arch/s390/kernel/ptrace.c: At top level: arch/s390/kernel/ptrace.c:1510:11: error: initialization of 'int (*)(struct task_struct *, const struct user_regset *, struct membuf)' from incompatible pointer type 'int (*)(struct task_struct *, const struct user_regset *, unsigned int, struct membuf)' [-Werror=incompatible-pointer-types] 1510 | .get2 = s390_fpregs_get, | ^~~~~~~~~~~~~~~ arch/s390/kernel/ptrace.c:1510:11: note: (near initialization for 's390_compat_regsets[1].get2') cc1: some warnings being treated as errors vim +1306 arch/s390/kernel/ptrace.c 1291 1292 static const struct user_regset s390_regsets[] = { 1293 { 1294 .core_note_type = NT_PRSTATUS, 1295 .n = sizeof(s390_regs) / sizeof(long), 1296 .size = sizeof(long), 1297 .align = sizeof(long), 1298 .get2 = s390_regs_get, 1299 .set = s390_regs_set, 1300 }, 1301 { 1302 .core_note_type = NT_PRFPREG, 1303 .n = sizeof(s390_fp_regs) / sizeof(long), 1304 .size = sizeof(long), 1305 .align = sizeof(long), 1307 .set = s390_fpregs_set, 1308 }, 1309 { 1310 .core_note_type = NT_S390_SYSTEM_CALL, 1311 .n = 1, 1312 .size = sizeof(unsigned int), 1313 .align = sizeof(unsigned int), 1314 .get2 = s390_system_call_get, 1315 .set = s390_system_call_set, 1316 }, 1317 { 1318 .core_note_type = NT_S390_LAST_BREAK, 1319 .n = 1, 1320 .size = sizeof(long), 1321 .align = sizeof(long), 1322 .get2 = s390_last_break_get, 1323 .set = s390_last_break_set, 1324 }, 1325 { 1326 .core_note_type = NT_S390_TDB, 1327 .n = 1, 1328 .size = 256, 1329 .align = 1, 1330 .get2 = s390_tdb_get, 1331 .set = s390_tdb_set, 1332 }, 1333 { 1334 .core_note_type = NT_S390_VXRS_LOW, 1335 .n = __NUM_VXRS_LOW, 1336 .size = sizeof(__u64), 1337 .align = sizeof(__u64), 1338 .get2 = s390_vxrs_low_get, 1339 .set = s390_vxrs_low_set, 1340 }, 1341 { 1342 .core_note_type = NT_S390_VXRS_HIGH, 1343 .n = __NUM_VXRS_HIGH, 1344 .size = sizeof(__vector128), 1345 .align = sizeof(__vector128), 1346 .get2 = s390_vxrs_high_get, 1347 .set = s390_vxrs_high_set, 1348 }, 1349 { 1350 .core_note_type = NT_S390_GS_CB, 1351 .n = sizeof(struct gs_cb) / sizeof(__u64), 1352 .size = sizeof(__u64), 1353 .align = sizeof(__u64), 1354 .get2 = s390_gs_cb_get, 1355 .set = s390_gs_cb_set, 1356 }, 1357 { 1358 .core_note_type = NT_S390_GS_BC, 1359 .n = sizeof(struct gs_cb) / sizeof(__u64), 1360 .size = sizeof(__u64), 1361 .align = sizeof(__u64), 1362 .get2 = s390_gs_bc_get, 1363 .set = s390_gs_bc_set, 1364 }, 1365 { 1366 .core_note_type = NT_S390_RI_CB, 1367 .n = sizeof(struct runtime_instr_cb) / sizeof(__u64), 1368 .size = sizeof(__u64), 1369 .align = sizeof(__u64), 1370 .get2 = s390_runtime_instr_get, 1371 .set = s390_runtime_instr_set, 1372 }, 1373 }; 1374 1375 static const struct user_regset_view user_s390_view = { 1376 .name = UTS_MACHINE, 1377 .e_machine = EM_S390, 1378 .regsets = s390_regsets, 1379 .n = ARRAY_SIZE(s390_regsets) 1380 }; 1381 1382 #ifdef CONFIG_COMPAT 1383 static int s390_compat_regs_get(struct task_struct *target, 1384 const struct user_regset *regset, 1385 struct membuf to) 1386 { 1387 unsigned n; 1388 1389 if (target == current) 1390 save_access_regs(target->thread.acrs); 1391 1392 for (n = 0; n < sizeof(s390_compat_regs); n += sizeof(compat_ulong_t)) 1393 membuf_store(&to, __peek_user_compat(target, n)); 1394 return 0; 1395 } 1396 1397 static int s390_compat_regs_set(struct task_struct *target, 1398 const struct user_regset *regset, 1399 unsigned int pos, unsigned int count, 1400 const void *kbuf, const void __user *ubuf) 1401 { 1402 int rc = 0; 1403 1404 if (target == current) 1405 save_access_regs(target->thread.acrs); 1406 1407 if (kbuf) { 1408 const compat_ulong_t *k = kbuf; 1409 while (count > 0 && !rc) { 1410 rc = __poke_user_compat(target, pos, *k++); 1411 count -= sizeof(*k); 1412 pos += sizeof(*k); 1413 } 1414 } else { 1415 const compat_ulong_t __user *u = ubuf; 1416 while (count > 0 && !rc) { 1417 compat_ulong_t word; 1418 rc = __get_user(word, u++); 1419 if (rc) 1420 break; 1421 rc = __poke_user_compat(target, pos, word); 1422 count -= sizeof(*u); 1423 pos += sizeof(*u); 1424 } 1425 } 1426 1427 if (rc == 0 && target == current) 1428 restore_access_regs(target->thread.acrs); 1429 1430 return rc; 1431 } 1432 1433 static int s390_compat_regs_high_get(struct task_struct *target, 1434 const struct user_regset *regset, 1435 struct membuf to) 1436 { 1437 compat_ulong_t *gprs_high; 1438 int i; 1439 1440 gprs_high = (compat_ulong_t *)task_pt_regs(target)->gprs; 1442 membuf_store(&to, *gprs_high); 1443 return 0; 1444 } 1445 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org