[frank-w-bpi-r2-4.14:5.4-wifi 7/10] include/linux/pm_wakeup.h:189:2: error: implicit declaration of function 'wakeup_source_prepare'; did you mean 'wakeup_source_create'?

[kbuild test robot <lkp@intel.com>]

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tree:   https://github.com/frank-w/BPI-R2-4.14 5.4-wifi
head:   247c0a1b4c448f34c618955cc97411eaed06056a
commit: 34473d49317bf5dad624e17560e9d5e94f57a799 [7/10] mt6625l: adding wifi-related changes outside driver-directory
config: i386-tinyconfig (attached as .config)
compiler: gcc-7 (Debian 7.4.0-14) 7.4.0
reproduce:
        git checkout 34473d49317bf5dad624e17560e9d5e94f57a799
        # save the attached .config to linux build tree
        make ARCH=i386 

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

Note: the frank-w-bpi-r2-4.14/5.4-wifi HEAD 247c0a1b4c448f34c618955cc97411eaed06056a builds fine.
      It only hurts bisectibility.

All errors (new ones prefixed by >>):

   In file included from include/linux/device.h:1337:0,
                    from include/linux/node.h:18,
                    from include/linux/swap.h:11,
                    from include/linux/suspend.h:5,
                    from arch/x86/kernel/asm-offsets.c:13:
   include/linux/pm_wakeup.h: In function 'wakeup_source_init':
>> include/linux/pm_wakeup.h:189:2: error: implicit declaration of function 'wakeup_source_prepare'; did you mean 'wakeup_source_create'? [-Werror=implicit-function-declaration]
     wakeup_source_prepare(ws, name);
     ^~~~~~~~~~~~~~~~~~~~~
     wakeup_source_create
   cc1: some warnings being treated as errors
   make[2]: *** [arch/x86/kernel/asm-offsets.s] Error 1
   make[2]: Target '__build' not remade because of errors.
   make[1]: *** [prepare0] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [sub-make] Error 2
   18 real  5 user  3 sys  52.50% cpu 	make prepare

vim +189 include/linux/pm_wakeup.h

   185	
   186	static inline void wakeup_source_init(struct wakeup_source *ws,
   187					      const char *name)
   188	{
 > 189		wakeup_source_prepare(ws, name);
   190		wakeup_source_add(ws);
   191	}
   192	

---
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