tree: https://github.com/jimc/linux.git dd-drm head: 558f6a2e2f7f44c4546cfae653b9c1c8f9b2f200 commit: 558f6a2e2f7f44c4546cfae653b9c1c8f9b2f200 [5/5] more-futzing config: powerpc64-randconfig-r036-20210511 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project a0fed635fe1701470062495a6ffee1c608f3f1bc) 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://github.com/jimc/linux/commit/558f6a2e2f7f44c4546cfae653b9c1c8f9b2... git remote add jimc https://github.com/jimc/linux.git git fetch --no-tags jimc dd-drm git checkout 558f6a2e2f7f44c4546cfae653b9c1c8f9b2f200 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=powerpc64 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 >>): ^ arch/powerpc/include/asm/io.h:556:56: 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 lib/dynamic_debug.c:35: 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:619: 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:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:216:1: note: expanded from here __do_insw ^ arch/powerpc/include/asm/io.h:557:56: 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 lib/dynamic_debug.c:35: 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:619: 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:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:218:1: note: expanded from here __do_insl ^ arch/powerpc/include/asm/io.h:558:56: 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 lib/dynamic_debug.c:35: 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:619: 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:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:220:1: note: expanded from here __do_outsb ^ arch/powerpc/include/asm/io.h:559:58: 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 lib/dynamic_debug.c:35: 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:619: 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:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:222:1: note: expanded from here __do_outsw ^ arch/powerpc/include/asm/io.h:560:58: 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 lib/dynamic_debug.c:35: 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:619: 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:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:224:1: note: expanded from here __do_outsl ^ arch/powerpc/include/asm/io.h:561:58: note: expanded from macro '__do_outsl' #define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ lib/dynamic_debug.c:1160:13: error: use of undeclared identifier 'OUR_QUERY_SIZE' char query[OUR_QUERY_SIZE]; ^ lib/dynamic_debug.c:1179:38: error: use of undeclared identifier 'format_class_prefixes' sprintf(query, "format '^%s' %cp", format_class_prefixes[bitpos], ^ .set = param_set_dyndbg, ^~~~~~~~~~~~~~~~ 12 warnings and 3 errors generated. vim +1203 lib/dynamic_debug.c 0f03b0e100e7a3 Jim Cromie 2021-04-18 1153 558f6a2e2f7f44 Jim Cromie 2021-04-23 1154 static int param_set_dyndbg(const char *instr, const char *prefixes[], 558f6a2e2f7f44 Jim Cromie 2021-04-23 1155 const struct kernel_param *kp) 0f03b0e100e7a3 Jim Cromie 2021-04-18 1156 { 0f03b0e100e7a3 Jim Cromie 2021-04-18 1157 unsigned int val; 0f03b0e100e7a3 Jim Cromie 2021-04-18 1158 unsigned long changes, result; 0f03b0e100e7a3 Jim Cromie 2021-04-18 1159 int rc, chgct = 0, totct = 0, bitpos; 0f03b0e100e7a3 Jim Cromie 2021-04-18 @1160 char query[OUR_QUERY_SIZE]; 0f03b0e100e7a3 Jim Cromie 2021-04-18 1161 558f6a2e2f7f44 Jim Cromie 2021-04-23 1162 if (!prefixes) { 558f6a2e2f7f44 Jim Cromie 2021-04-23 1163 pr_err("%s: exec err:%d on: %s\n", __func__, chgct, query); 558f6a2e2f7f44 Jim Cromie 2021-04-23 1164 return -EINVAL; 558f6a2e2f7f44 Jim Cromie 2021-04-23 1165 } 558f6a2e2f7f44 Jim Cromie 2021-04-23 1166 0f03b0e100e7a3 Jim Cromie 2021-04-18 1167 rc = kstrtouint(instr, 0, &val); 0f03b0e100e7a3 Jim Cromie 2021-04-18 1168 if (rc) { 0f03b0e100e7a3 Jim Cromie 2021-04-18 1169 pr_err("%s: failed\n", __func__); 0f03b0e100e7a3 Jim Cromie 2021-04-18 1170 return -EINVAL; 0f03b0e100e7a3 Jim Cromie 2021-04-18 1171 } 0f03b0e100e7a3 Jim Cromie 2021-04-18 1172 result = val; 0f03b0e100e7a3 Jim Cromie 2021-04-18 1173 // changes = result ^ __drm_debug; 0f03b0e100e7a3 Jim Cromie 2021-04-18 1174 0f03b0e100e7a3 Jim Cromie 2021-04-18 1175 pr_debug("changes:0x%lx from result:0x%lx\n", changes, result); 0f03b0e100e7a3 Jim Cromie 2021-04-18 1176 558f6a2e2f7f44 Jim Cromie 2021-04-23 1177 for_each_set_bit(bitpos, &changes, 32) { //ARRAY_SIZE(format_class_prefixes)) { 0f03b0e100e7a3 Jim Cromie 2021-04-18 1178 0f03b0e100e7a3 Jim Cromie 2021-04-18 1179 sprintf(query, "format '^%s' %cp", format_class_prefixes[bitpos], 0f03b0e100e7a3 Jim Cromie 2021-04-18 1180 test_bit(bitpos, &result) ? '+' : '-'); 0f03b0e100e7a3 Jim Cromie 2021-04-18 1181 0f03b0e100e7a3 Jim Cromie 2021-04-18 1182 chgct = dynamic_debug_exec_queries(query, "drm*"); 0f03b0e100e7a3 Jim Cromie 2021-04-18 1183 if (chgct < 0) { 0f03b0e100e7a3 Jim Cromie 2021-04-18 1184 pr_err("%s: exec err:%d on: %s\n", __func__, chgct, query); 0f03b0e100e7a3 Jim Cromie 2021-04-18 1185 continue; 0f03b0e100e7a3 Jim Cromie 2021-04-18 1186 } 0f03b0e100e7a3 Jim Cromie 2021-04-18 1187 pr_debug("change ct:%d on %s\n", chgct, query); 0f03b0e100e7a3 Jim Cromie 2021-04-18 1188 totct += chgct; 0f03b0e100e7a3 Jim Cromie 2021-04-18 1189 } 0f03b0e100e7a3 Jim Cromie 2021-04-18 1190 pr_debug("total changes: %d\n", totct); 0f03b0e100e7a3 Jim Cromie 2021-04-18 1191 //__drm_debug = result; 0f03b0e100e7a3 Jim Cromie 2021-04-18 1192 return 0; 0f03b0e100e7a3 Jim Cromie 2021-04-18 1193 } 0f03b0e100e7a3 Jim Cromie 2021-04-18 1194 0f03b0e100e7a3 Jim Cromie 2021-04-18 1195 static int param_get_dyndbg(char *buffer, const struct kernel_param *kp) 0f03b0e100e7a3 Jim Cromie 2021-04-18 1196 { 0f03b0e100e7a3 Jim Cromie 2021-04-18 1197 pr_debug("debug-val:0x%x\n", //__drm_debug 0f03b0e100e7a3 Jim Cromie 2021-04-18 1198 *((unsigned int *)kp->arg)); 0f03b0e100e7a3 Jim Cromie 2021-04-18 1199 return scnprintf(buffer, PAGE_SIZE, "%u\n", 0f03b0e100e7a3 Jim Cromie 2021-04-18 1200 *((unsigned int *)kp->arg)); 0f03b0e100e7a3 Jim Cromie 2021-04-18 1201 } 0f03b0e100e7a3 Jim Cromie 2021-04-18 1202 static const struct kernel_param_ops param_ops_debug = { 0f03b0e100e7a3 Jim Cromie 2021-04-18 @1203 .set = param_set_dyndbg, :::::: The code at line 1203 was first introduced by commit :::::: 0f03b0e100e7a3c1568a2454f3d453f1706d636e dyndbg: 1st port of bitmap-to-query code :::::: TO: Jim Cromie <jim.cromie(a)gmail.com&gt; :::::: CC: Jim Cromie <jim.cromie(a)gmail.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org