tree:   https://git.kernel.org/pub/scm/linux/kernel/git/bigeasy/staging.git preemption
head:   94ad72514bd0c0c9c31dee81fb6339daf06e508f
commit: 421a3f5894210a669b68c61aba12fbd655b58fdf [17/36] s390: Use CONFIG_PREEMPTION
config: s390-allmodconfig (attached as .config)
compiler: s390-linux-gcc (GCC) 7.4.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 421a3f5894210a669b68c61aba12fbd655b58fdf
        # save the attached .config to linux build tree
        GCC_VERSION=7.4.0 make.cross ARCH=s390 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   arch/s390/kernel/dumpstack.c: In function 'die':
>> arch/s390/kernel/dumpstack.c:197:7: warning: "CONFIG_PREEMPT_RT" is not defined, evaluates to 0 [-Wundef]
    #elif CONFIG_PREEMPT_RT
          ^~~~~~~~~~~~~~~~~

vim +/CONFIG_PREEMPT_RT +197 arch/s390/kernel/dumpstack.c

   182	
   183	void die(struct pt_regs *regs, const char *str)
   184	{
   185		static int die_counter;
   186	
   187		oops_enter();
   188		lgr_info_log();
   189		debug_stop_all();
   190		console_verbose();
   191		spin_lock_irq(&die_lock);
   192		bust_spinlocks(1);
   193		printk("%s: %04x ilc:%d [#%d] ", str, regs->int_code & 0xffff,
   194		       regs->int_code >> 17, ++die_counter);
   195	#ifdef CONFIG_PREEMPT
   196		pr_cont("PREEMPT ");
 > 197	#elif CONFIG_PREEMPT_RT

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