[powerpc:next-test 167/234] arch/powerpc/kernel/eeh_event.c:124:23: error: implicit declaration of function 'stack_trace_save'; did you mean 'stack_depot_save'?

tree:   https://kernel.googlesource.com/pub/scm/linux/kernel/git/powerpc/linux.git next-test
head:   4fead715c62a5196fa57218a1992e5eb8437dd8a
commit: 25baf3d81614b0b8ca8958f4d6f111ccaaaad578 [167/234] powerpc/eeh: Defer printing stack trace
config: powerpc-skiroot_defconfig (attached as .config)
compiler: powerpc64le-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 25baf3d81614b0b8ca8958f4d6f111ccaaaad578
        # save the attached .config to linux build tree
        GCC_VERSION=7.4.0 make.cross ARCH=powerpc 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <redacted>

All errors (new ones prefixed by >>):

   arch/powerpc/kernel/eeh_event.c: In function '__eeh_send_failure_event':

quoted

arch/powerpc/kernel/eeh_event.c:124:23: error: implicit declaration of function 'stack_trace_save'; did you mean 'stack_depot_save'? [-Werror=implicit-function-declaration]

      pe->trace_entries = stack_trace_save(pe->stack_trace,
                          ^~~~~~~~~~~~~~~~
                          stack_depot_save
   cc1: all warnings being treated as errors

vim +124 arch/powerpc/kernel/eeh_event.c

    93	
    94	/**
    95	 * eeh_send_failure_event - Generate a PCI error event
    96	 * @pe: EEH PE
    97	 *
    98	 * This routine can be called within an interrupt context;
    99	 * the actual event will be delivered in a normal context
   100	 * (from a workqueue).
   101	 */
   102	int __eeh_send_failure_event(struct eeh_pe *pe)
   103	{
   104		unsigned long flags;
   105		struct eeh_event *event;
   106	
   107		event = kzalloc(sizeof(*event), GFP_ATOMIC);
   108		if (!event) {
   109			pr_err("EEH: out of memory, event not handled\n");
   110			return -ENOMEM;
   111		}
   112		event->pe = pe;
   113	
   114		/*
   115		 * Mark the PE as recovering before inserting it in the queue.
   116		 * This prevents the PE from being free()ed by a hotplug driver
   117		 * while the PE is sitting in the event queue.
   118		 */
   119		if (pe) {
   120			/*
   121			 * Save the current stack trace so we can dump it from the
   122			 * event handler thread.
   123			 */
 > 124			pe->trace_entries = stack_trace_save(pe->stack_trace,
   125						 ARRAY_SIZE(pe->stack_trace), 0);
   126	
   127			eeh_pe_state_mark(pe, EEH_PE_RECOVERING);
   128		}
   129	
   130		/* We may or may not be called in an interrupt context */
   131		spin_lock_irqsave(&eeh_eventlist_lock, flags);
   132		list_add(&event->list, &eeh_eventlist);
   133		spin_unlock_irqrestore(&eeh_eventlist_lock, flags);
   134	
   135		/* For EEH deamon to knick in */
   136		complete(&eeh_eventlist_event);
   137	
   138		return 0;
   139	}
   140	

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