tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.core/stacktrace
head:   9fe290aca53f59fd24187841dd4a8ff41ade91bd
commit: 9fe290aca53f59fd24187841dd4a8ff41ade91bd [32/32] x86/stacktrace: Use common infrastructure
config: i386-randconfig-a1-201915 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4
reproduce:
        git checkout 9fe290aca53f59fd24187841dd4a8ff41ade91bd
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

   In file included from include/linux/lockdep.h:29:0,
                    from include/linux/spinlock_types.h:18,
                    from kernel/bounds.c:14:
>> include/linux/stacktrace.h:84:14: warning: 'struct stack_trace' declared inside parameter list
          struct stack_trace *trace)
                 ^
>> include/linux/stacktrace.h:84:14: warning: its scope is only this definition or declaration, which is probably not what you want
   include/linux/stacktrace.h: In function 'save_stack_trace_tsk_reliable':
   include/linux/stacktrace.h:86:10: error: 'ENOSYS' undeclared (first use in this function)
     return -ENOSYS;
             ^
   include/linux/stacktrace.h:86:10: note: each undeclared identifier is reported only once for each function it appears in
   make[2]: *** [kernel/bounds.s] Error 1
   make[2]: Target '__build' not remade because of errors.
   make[1]: *** [prepare0] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [sub-make] Error 2

vim +84 include/linux/stacktrace.h

8637c099 Ingo Molnar     2006-07-03  81  
714f46ba Thomas Gleixner 2019-04-09  82  #if !defined(CONFIG_STACKTRACE) || !defined(CONFIG_HAVE_RELIABLE_STACKTRACE)
714f46ba Thomas Gleixner 2019-04-09  83  static inline int save_stack_trace_tsk_reliable(struct task_struct *tsk,
714f46ba Thomas Gleixner 2019-04-09 @84  						struct stack_trace *trace)
714f46ba Thomas Gleixner 2019-04-09  85  {
714f46ba Thomas Gleixner 2019-04-09  86  	return -ENOSYS;
714f46ba Thomas Gleixner 2019-04-09  87  }
714f46ba Thomas Gleixner 2019-04-09  88  #endif
714f46ba Thomas Gleixner 2019-04-09  89  

:::::: The code at line 84 was first introduced by commit
:::::: 714f46ba649b163e80d3dd89e83b92f4ba5ac6af stacktrace: Provide helpers for common stack trace operations

:::::: TO: Thomas Gleixner <tglx@linutronix.de>
:::::: CC: Thomas Gleixner <tglx@linutronix.de>

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0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation