drivers/rtc/rtc-bd70528.c:365: undefined reference to `bd70528_wdt_lock'

[kbuild test robot]

Hi Matti,

FYI, the error/warning still remains.

tree:   
https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux.git 
master
head:   33920f1ec5bf47c5c0a1d2113989bdd9dfb3fae9
commit: 32a4a4ebf76848828d67f519d07af9eadb6e8300 rtc: bd70528: Initial support 
for ROHM bd70528 RTC
date:   6 weeks ago
config: x86_64-randconfig-s0-201930 (attached as .config)
compiler: gcc-7 (Debian 7.4.0-10) 7.4.0
reproduce:
        git checkout 32a4a4ebf76848828d67f519d07af9eadb6e8300
        # save the attached .config to linux build tree
        make ARCH=x86_64 

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

All errors (new ones prefixed by >>):

   ld: drivers/rtc/rtc-bd70528.o: in function `bd70528_alm_enable':
>> drivers/rtc/rtc-bd70528.c:365: undefined reference to `bd70528_wdt_lock'
>> ld: drivers/rtc/rtc-bd70528.c:377: undefined reference to 
>> `bd70528_wdt_unlock'
   ld: drivers/rtc/rtc-bd70528.o: in function `bd70528_set_rtc_based_timers':
>> drivers/rtc/rtc-bd70528.c:126: undefined reference to `bd70528_wdt_set'
   ld: drivers/rtc/rtc-bd70528.o: in function `bd70528_set_time':
   drivers/rtc/rtc-bd70528.c:329: undefined reference to `bd70528_wdt_lock'
   ld: drivers/rtc/rtc-bd70528.c:331: undefined reference to 
`bd70528_wdt_unlock'

vim +365 drivers/rtc/rtc-bd70528.c

   355  
   356  static int bd70528_alm_enable(struct device *dev, unsigned int enabled)
   357  {
   358          int ret;
   359          unsigned int enableval = BD70528_MASK_ALM_EN;
   360          struct bd70528_rtc *r = dev_get_drvdata(dev);
   361  
   362          if (enabled)
   363                  enableval = 0;
   364  
 > 365          bd70528_wdt_lock(r->mfd);
   366          ret = bd70528_set_wake(r->mfd, enabled, NULL);
   367          if (ret) {
   368                  dev_err(dev, "Failed to change wake state\n");
   369                  goto out_unlock;
   370          }
   371          ret = regmap_update_bits(r->mfd->regmap, 
BD70528_REG_RTC_ALM_MASK,
   372                                   BD70528_MASK_ALM_EN, enableval);
   373          if (ret)
   374                  dev_err(dev, "Failed to change alarm state\n");
   375  
   376  out_unlock:
 > 377          bd70528_wdt_unlock(r->mfd);
   378          return ret;
   379  }
   380  

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