[kbuild-all] net/ceph/messenger_v1.c:1351:5: warning: stack frame size of 1216 bytes in function 'ceph_con_v1_try_write'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 89698becf06d341a700913c3d89ce2a914af69a2 commit: 2f713615ddd9d805b6c5e79c52e0e11af99d2bf1 libceph: move msgr1 protocol implementation to its own file date: 4 months ago config: powerpc64-randconfig-r014-20210413 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 9829f5e6b1bca9b61efc629770d28bb9014dec45) 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 powerpc64 cross compiling tool for clang build # apt-get install binutils-powerpc64-linux-gnu # 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 2f713615ddd9d805b6c5e79c52e0e11af99d2bf1 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64 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 >>): __do_insb ^ arch/powerpc/include/asm/io.h:541:56: note: expanded from macro '__do_insb' #define __do_insb(p, b, n) readsb((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from net/ceph/messenger_v1.c:8: In file included from include/net/sock.h:38: In file included from include/linux/hardirq.h:10: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:45:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(insw, (unsigned long p, void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:12:1: note: expanded from here __do_insw ^ arch/powerpc/include/asm/io.h:542:56: note: expanded from macro '__do_insw' #define __do_insw(p, b, n) readsw((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from net/ceph/messenger_v1.c:8: In file included from include/net/sock.h:38: In file included from include/linux/hardirq.h:10: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:47:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(insl, (unsigned long p, void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:14:1: note: expanded from here __do_insl ^ arch/powerpc/include/asm/io.h:543:56: note: expanded from macro '__do_insl' #define __do_insl(p, b, n) readsl((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from net/ceph/messenger_v1.c:8: In file included from include/net/sock.h:38: In file included from include/linux/hardirq.h:10: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:49:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsb, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:16:1: note: expanded from here __do_outsb ^ arch/powerpc/include/asm/io.h:544:58: note: expanded from macro '__do_outsb' #define __do_outsb(p, b, n) writesb((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from net/ceph/messenger_v1.c:8: In file included from include/net/sock.h:38: In file included from include/linux/hardirq.h:10: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:51:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsw, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:18:1: note: expanded from here __do_outsw ^ arch/powerpc/include/asm/io.h:545:58: note: expanded from macro '__do_outsw' #define __do_outsw(p, b, n) writesw((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from net/ceph/messenger_v1.c:8: In file included from include/net/sock.h:38: In file included from include/linux/hardirq.h:10: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:53:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsl, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:20:1: note: expanded from here __do_outsl ^ arch/powerpc/include/asm/io.h:546:58: note: expanded from macro '__do_outsl' #define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ int ceph_con_v1_try_write(struct ceph_connection *con) ^ 7 warnings generated. vim +/ceph_con_v1_try_write +1351 net/ceph/messenger_v1.c 1346 1347 /* 1348 * Write something to the socket. Called in a worker thread when the 1349 * socket appears to be writeable and we have something ready to send. 1350 */ 1352 { 1353 int ret = 1; 1354 1355 dout("try_write start %p state %d\n", con, con->state); 1356 if (con->state != CEPH_CON_S_PREOPEN && 1357 con->state != CEPH_CON_S_V1_BANNER && 1358 con->state != CEPH_CON_S_V1_CONNECT_MSG && 1359 con->state != CEPH_CON_S_OPEN) 1360 return 0; 1361 1362 /* open the socket first? */ 1363 if (con->state == CEPH_CON_S_PREOPEN) { 1364 BUG_ON(con->sock); 1365 con->state = CEPH_CON_S_V1_BANNER; 1366 1367 con_out_kvec_reset(con); 1368 prepare_write_banner(con); 1369 prepare_read_banner(con); 1370 1371 BUG_ON(con->in_msg); 1372 con->in_tag = CEPH_MSGR_TAG_READY; 1373 dout("try_write initiating connect on %p new state %d\n", 1374 con, con->state); 1375 ret = ceph_tcp_connect(con); 1376 if (ret < 0) { 1377 con->error_msg = "connect error"; 1378 goto out; 1379 } 1380 } 1381 1382 more: 1383 dout("try_write out_kvec_bytes %d\n", con->out_kvec_bytes); 1384 BUG_ON(!con->sock); 1385 1386 /* kvec data queued? */ 1387 if (con->out_kvec_left) { 1388 ret = write_partial_kvec(con); 1389 if (ret <= 0) 1390 goto out; 1391 } 1392 if (con->out_skip) { 1393 ret = write_partial_skip(con); 1394 if (ret <= 0) 1395 goto out; 1396 } 1397 1398 /* msg pages? */ 1399 if (con->out_msg) { 1400 if (con->out_msg_done) { 1401 ceph_msg_put(con->out_msg); 1402 con->out_msg = NULL; /* we're done with this one */ 1403 goto do_next; 1404 } 1405 1406 ret = write_partial_message_data(con); 1407 if (ret == 1) 1408 goto more; /* we need to send the footer, too! */ 1409 if (ret == 0) 1410 goto out; 1411 if (ret < 0) { 1412 dout("try_write write_partial_message_data err %d\n", 1413 ret); 1414 goto out; 1415 } 1416 } 1417 1418 do_next: 1419 if (con->state == CEPH_CON_S_OPEN) { 1420 if (ceph_con_flag_test_and_clear(con, 1421 CEPH_CON_F_KEEPALIVE_PENDING)) { 1422 prepare_write_keepalive(con); 1423 goto more; 1424 } 1425 /* is anything else pending? */ 1426 if (!list_empty(&con->out_queue)) { 1427 prepare_write_message(con); 1428 goto more; 1429 } 1430 if (con->in_seq > con->in_seq_acked) { 1431 prepare_write_ack(con); 1432 goto more; 1433 } 1434 } 1435 1436 /* Nothing to do! */ 1437 ceph_con_flag_clear(con, CEPH_CON_F_WRITE_PENDING); 1438 dout("try_write nothing else to write.\n"); 1439 ret = 0; 1440 out: 1441 dout("try_write done on %p ret %d\n", con, ret); 1442 return ret; 1443 } 1444 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org