[tip:WIP.sched/core 120/122] arch/powerpc/platforms/83xx/suspend.c:271:7: error: implicit declaration of function 'signal_pending'

[kbuild test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.sched/core
head:   a69a38e26e87ddbe993e33b55f693405cd62c76f
commit: 88d0fe4cbc5e74cda2764df63cb369f32746af54 [120/122] sched/headers: Move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>
config: powerpc-mpc83xx_defconfig (attached as .config)
compiler: powerpc-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 88d0fe4cbc5e74cda2764df63cb369f32746af54
        # save the attached .config to linux build tree
        make.cross ARCH=powerpc 

All errors (new ones prefixed by >>):

   arch/powerpc/platforms/83xx/suspend.c: In function 'agent_thread_fn':
>> arch/powerpc/platforms/83xx/suspend.c:271:7: error: implicit declaration of function 'signal_pending' [-Werror=implicit-function-declaration]
      if (signal_pending(current) || pci_pm_state < 2)
          ^~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/signal_pending +271 arch/powerpc/platforms/83xx/suspend.c

d49747bd Scott Wood 2007-10-09  265  static int agent_thread_fn(void *data)
d49747bd Scott Wood 2007-10-09  266  {
d49747bd Scott Wood 2007-10-09  267  	while (1) {
d49747bd Scott Wood 2007-10-09  268  		wait_event_interruptible(agent_wq, pci_pm_state >= 2);
d49747bd Scott Wood 2007-10-09  269  		try_to_freeze();
d49747bd Scott Wood 2007-10-09  270  
d49747bd Scott Wood 2007-10-09 @271  		if (signal_pending(current) || pci_pm_state < 2)
d49747bd Scott Wood 2007-10-09  272  			continue;
d49747bd Scott Wood 2007-10-09  273  
d49747bd Scott Wood 2007-10-09  274  		/* With a preemptible kernel (or SMP), this could race with

:::::: The code at line 271 was first introduced by commit
:::::: d49747bdfb2ddebea24d1580da55b79d093d48a9 powerpc/mpc83xx: Power Management support

:::::: TO: Scott Wood <scottwood@xxxxxxxxxxxxx>
:::::: CC: Kumar Gala <galak@xxxxxxxxxxxxxxxxxxx>

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