[linux-next:master 9661/9894] arch/x86/xen/enlighten.c:1328:2: note: in expansion of macro 'if'

[kbuild test robot <fengguang.wu@intel.com>]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   fd8d43a58dacbbde8beaaecbeaed7bd8bdbe6859
commit: 01eff0378a46a33a1252f9a3a4817263e16f52c0 [9661/9894] kexec: allow kdump with crash_kexec_post_notifiers
config: x86_64-randconfig-i0-201628 (attached as .config)
compiler: gcc-6 (Debian 6.1.1-1) 6.1.1 20160430
reproduce:
        git checkout 01eff0378a46a33a1252f9a3a4817263e16f52c0
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

   In file included from include/linux/ioport.h:12:0,
                    from include/linux/device.h:16,
                    from include/linux/node.h:17,
                    from include/linux/cpu.h:16,
                    from arch/x86/xen/enlighten.c:14:
   arch/x86/xen/enlighten.c: In function 'xen_panic_event':
   arch/x86/xen/enlighten.c:1328:7: error: implicit declaration of function 'kexec_crash_loaded' [-Werror=implicit-function-declaration]
     if (!kexec_crash_loaded())
          ^
   include/linux/compiler.h:151:30: note: in definition of macro '__trace_if'
     if (__builtin_constant_p(!!(cond)) ? !!(cond) :   \
                                 ^~~~
>> arch/x86/xen/enlighten.c:1328:2: note: in expansion of macro 'if'
     if (!kexec_crash_loaded())
     ^~
   cc1: some warnings being treated as errors

vim +/if +1328 arch/x86/xen/enlighten.c

  1312	
  1313	static void xen_machine_power_off(void)
  1314	{
  1315		if (pm_power_off)
  1316			pm_power_off();
  1317		xen_reboot(SHUTDOWN_poweroff);
  1318	}
  1319	
  1320	static void xen_crash_shutdown(struct pt_regs *regs)
  1321	{
  1322		xen_reboot(SHUTDOWN_crash);
  1323	}
  1324	
  1325	static int
  1326	xen_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
  1327	{
> 1328		if (!kexec_crash_loaded())
  1329			xen_reboot(SHUTDOWN_crash);
  1330		return NOTIFY_DONE;
  1331	}
  1332	
  1333	static struct notifier_block xen_panic_block = {
  1334		.notifier_call= xen_panic_event,
  1335		.priority = INT_MIN
  1336	};

---
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