[kbuild-all] [linux-stable-rc:linux-5.4.y 5527/5583] arch/powerpc/xmon/xmon.c:489:6: error: variable 'cmd' might be clobbered by 'longjmp' or 'vfork'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-5.4.y head: 12a5ce113626ce8208aef76d4d2e9fc93ea48ddf commit: 99c63ba21d2ea9d28880b0341b25e4a4ce8a18bb [5527/5583] powerpc/xmon: Restrict when kernel is locked down config: powerpc64-randconfig-r002-20210720 (attached as .config) compiler: powerpc-linux-gcc (GCC) 10.3.0 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 # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.gi... git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git git fetch --no-tags linux-stable-rc linux-5.4.y git checkout 99c63ba21d2ea9d28880b0341b25e4a4ce8a18bb # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 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 errors (new ones prefixed by >>): In file included from arch/powerpc/xmon/xmon.c:64: arch/powerpc/xmon/dis-asm.h: In function 'print_insn_powerpc': arch/powerpc/xmon/dis-asm.h:16:13: error: format '%x' expects argument of type 'unsigned int', but argument 2 has type 'long unsigned int' [-Werror=format=] 16 | printf("%.8x", insn); | ~~~^ ~~~~ | | | | | long unsigned int | unsigned int | %.8lx arch/powerpc/xmon/dis-asm.h: In function 'print_insn_spu': arch/powerpc/xmon/dis-asm.h:22:13: error: format '%x' expects argument of type 'unsigned int', but argument 2 has type 'long unsigned int' [-Werror=format=] 22 | printf("%.8x", insn); | ~~~^ ~~~~ | | | | | long unsigned int | unsigned int | %.8lx arch/powerpc/xmon/xmon.c: In function 'xmon_print_symbol': arch/powerpc/xmon/xmon.c:3535:14: error: variable 'name' might be clobbered by 'longjmp' or 'vfork' [-Werror=clobbered] 3535 | const char *name = NULL; | ^~~~ arch/powerpc/xmon/xmon.c: In function 'show_pte': arch/powerpc/xmon/xmon.c:3121:22: error: variable 'tsk' might be clobbered by 'longjmp' or 'vfork' [-Werror=clobbered] 3121 | struct task_struct *tsk = NULL; | ^~~ arch/powerpc/xmon/xmon.c: In function 'show_tasks': arch/powerpc/xmon/xmon.c:3217:22: error: variable 'tsk' might be clobbered by 'longjmp' or 'vfork' [-Werror=clobbered] 3217 | struct task_struct *tsk = NULL; | ^~~ arch/powerpc/xmon/xmon.c: In function 'xmon_core': 489 | int cmd = 0; | ^~~ arch/powerpc/xmon/xmon.c:848:14: error: variable 'bp' might be clobbered by 'longjmp' or 'vfork' [-Werror=clobbered] 848 | struct bpt *bp; | ^~ arch/powerpc/xmon/xmon.c:848:14: error: variable 'bp' might be clobbered by 'longjmp' or 'vfork' [-Werror=clobbered] arch/powerpc/xmon/xmon.c:487:48: error: argument 'fromipi' might be clobbered by 'longjmp' or 'vfork' [-Werror=clobbered] 487 | static int xmon_core(struct pt_regs *regs, int fromipi) | ~~~~^~~~~~~ cc1: all warnings being treated as errors vim +489 arch/powerpc/xmon/xmon.c daf8f40391b2a1 arch/powerpc/xmon/xmon.c Josh Boyer 2009-09-23 486 b0da985644faa4 arch/powerpc/xmon/xmon.c Arnd Bergmann 2006-01-11 487 static int xmon_core(struct pt_regs *regs, int fromipi) ^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 488 { ^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 @489 int cmd = 0; ^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 490 struct bpt *bp; ^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 491 long recurse_jmp[JMP_BUF_LEN]; 99c63ba21d2ea9 arch/powerpc/xmon/xmon.c Christopher M. Riedl 2019-09-07 492 bool locked_down; ^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 493 unsigned long offset; f13659e0b39075 arch/powerpc/xmon/xmon.c Anton Blanchard 2007-03-21 494 unsigned long flags; ^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 495 #ifdef CONFIG_SMP ^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 496 int cpu; ^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 497 int secondary; ^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 498 #endif ^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 499 f13659e0b39075 arch/powerpc/xmon/xmon.c Anton Blanchard 2007-03-21 500 local_irq_save(flags); a71d64b4dc4067 arch/powerpc/xmon/xmon.c Anton Blanchard 2014-08-05 501 hard_irq_disable(); ^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 502 99c63ba21d2ea9 arch/powerpc/xmon/xmon.c Christopher M. Riedl 2019-09-07 503 locked_down = xmon_is_locked_down(); 99c63ba21d2ea9 arch/powerpc/xmon/xmon.c Christopher M. Riedl 2019-09-07 504 aaf06665f7ea3e arch/powerpc/xmon/xmon.c Naveen N. Rao 2019-06-27 505 if (!fromipi) { ed49f7fd6438dc arch/powerpc/xmon/xmon.c Breno Leitao 2017-08-02 506 tracing_enabled = tracing_is_on(); ed49f7fd6438dc arch/powerpc/xmon/xmon.c Breno Leitao 2017-08-02 507 tracing_off(); aaf06665f7ea3e arch/powerpc/xmon/xmon.c Naveen N. Rao 2019-06-27 508 } ed49f7fd6438dc arch/powerpc/xmon/xmon.c Breno Leitao 2017-08-02 509 ^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 510 bp = in_breakpoint_table(regs->nip, &offset); ^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 511 if (bp != NULL) { ^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 512 regs->nip = bp->address + offset; ^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 513 atomic_dec(&bp->ref_count); ^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 514 } ^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 515 ^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 516 remove_cpu_bpts(); ^1da177e4c3f41 arch/ppc64/xmon/xmon.c Linus Torvalds 2005-04-16 517 :::::: The code at line 489 was first introduced by commit :::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2 :::::: TO: Linus Torvalds <torvalds(a)ppc970.osdl.org&gt; :::::: CC: Linus Torvalds <torvalds(a)ppc970.osdl.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org