[norov:kerne-unload 6/6] arch/s390/kernel/machine_kexec.c:254:2: error: call to undeclared function 'tracing_off'; ISO C99 and later do not support implicit function declarations

[norov:kerne-unload 6/6] arch/s390/kernel/machine_kexec.c:254:2: error: call to undeclared function 'tracing_off'; ISO C99 and later do not support implicit function declarations

[kernel test robot]

tree:   https://github.com/norov/linux kerne-unload
head:   a2b83b8a1af321f2206864668e042008f27a0fbf
commit: a2b83b8a1af321f2206864668e042008f27a0fbf [6/6] drop trace_printk.h
config: s390-defconfig (https://download.01.org/0day-ci/archive/20251224/202512241352.Ec4E1Goi-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 4ef602d446057dabf5f61fb221669ecbeda49279)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251224/202512241352.Ec4E1Goi-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202512241352.Ec4E1Goi-lkp@intel.com/

All errors (new ones prefixed by >>):

>> arch/s390/kernel/machine_kexec.c:254:2: error: call to undeclared function 'tracing_off'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     254 |         tracing_off();
         |         ^
   1 error generated.


vim +/tracing_off +254 arch/s390/kernel/machine_kexec.c

2c2df118a64407 Heiko Carstens     2010-02-26  247  
60a0c68df2632f Michael Holzheu    2011-10-30  248  /*
60a0c68df2632f Michael Holzheu    2011-10-30  249   * Reset system and call either kdump or normal kexec
60a0c68df2632f Michael Holzheu    2011-10-30  250   */
60a0c68df2632f Michael Holzheu    2011-10-30  251  static void __machine_kexec(void *data)
60a0c68df2632f Michael Holzheu    2011-10-30  252  {
60a0c68df2632f Michael Holzheu    2011-10-30  253  	pfault_fini();
3ab121ab186692 Michael Holzheu    2012-03-11 @254  	tracing_off();
3ab121ab186692 Michael Holzheu    2012-03-11  255  	debug_locks_off();
10ad34bc76dfbc Martin Schwidefsky 2015-01-14  256  #ifdef CONFIG_CRASH_DUMP
1a36a39e225d35 Martin Schwidefsky 2015-10-29  257  	if (((struct kimage *) data)->type == KEXEC_TYPE_CRASH)
1a36a39e225d35 Martin Schwidefsky 2015-10-29  258  		__machine_kdump(data);
10ad34bc76dfbc Martin Schwidefsky 2015-01-14  259  #endif
1a36a39e225d35 Martin Schwidefsky 2015-10-29  260  	__do_machine_kexec(data);
60a0c68df2632f Michael Holzheu    2011-10-30  261  }
60a0c68df2632f Michael Holzheu    2011-10-30  262  

:::::: The code at line 254 was first introduced by commit
:::::: 3ab121ab18669226742891416fe7ecc86dadb047 [S390] kernel: Add z/VM LGR detection

:::::: TO: Michael Holzheu <holzheu@linux.vnet.ibm.com>
:::::: CC: Martin Schwidefsky <schwidefsky@de.ibm.com>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki