Hi Arnd,

I love your patch! Yet something to improve:

[auto build test ERROR on powerpc/next]
[also build test ERROR on v4.17-rc2 next-20180423]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Arnd-Bergmann/powerpc-always-enable-RTC_LIB/20180423-223504
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc64-defconfig (attached as .config)
compiler: powerpc64-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=powerpc64 

All errors (new ones prefixed by >>):

   arch/powerpc/platforms/maple/time.c: In function 'maple_get_boot_time':
>> arch/powerpc/platforms/maple/time.c:173:9: error: implicit declaration of function 'rtc_tm_to_time66'; did you mean 'rtc_tm_to_time64'? [-Werror=implicit-function-declaration]
     return rtc_tm_to_time66(&tm);
            ^~~~~~~~~~~~~~~~
            rtc_tm_to_time64
   cc1: all warnings being treated as errors

vim +173 arch/powerpc/platforms/maple/time.c

   139	
   140	time64_t __init maple_get_boot_time(void)
   141	{
   142		struct rtc_time tm;
   143		struct device_node *rtcs;
   144	
   145		rtcs = of_find_compatible_node(NULL, "rtc", "pnpPNP,b00");
   146		if (rtcs) {
   147			struct resource r;
   148			if (of_address_to_resource(rtcs, 0, &r)) {
   149				printk(KERN_EMERG "Maple: Unable to translate RTC"
   150				       " address\n");
   151				goto bail;
   152			}
   153			if (!(r.flags & IORESOURCE_IO)) {
   154				printk(KERN_EMERG "Maple: RTC address isn't PIO!\n");
   155				goto bail;
   156			}
   157			maple_rtc_addr = r.start;
   158			printk(KERN_INFO "Maple: Found RTC at IO 0x%x\n",
   159			       maple_rtc_addr);
   160		}
   161	 bail:
   162		if (maple_rtc_addr == 0) {
   163			maple_rtc_addr = RTC_PORT(0); /* legacy address */
   164			printk(KERN_INFO "Maple: No device node for RTC, assuming "
   165			       "legacy address (0x%x)\n", maple_rtc_addr);
   166		}
   167	
   168		rtc_iores.start = maple_rtc_addr;
   169		rtc_iores.end = maple_rtc_addr + 7;
   170		request_resource(&ioport_resource, &rtc_iores);
   171	
   172		maple_get_rtc_time(&tm);
 > 173		return rtc_tm_to_time66(&tm);
   174	}
   175	

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