[PATCH] powerpc/vdso64: Add support for CLOCK_{REALTIME/MONOTONIC}_COARSE

[kbuild test robot]

Hi Santosh,

[auto build test ERROR on powerpc/next]
[also build test ERROR on v4.13-rc1 next-20170721]
[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/Santosh-Sivaraj/powerpc-vdso64-Add-support-for-CLOCK_-REALTIME-MONOTONIC-_COARSE/20170722-235025
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc-ps3_defconfig (attached as .config)
compiler: powerpc64-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://raw.githubusercontent.com/01org/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=powerpc 

All errors (new ones prefixed by >>):

   arch/powerpc/kernel/vdso64/gettime.o: In function `kernel_clock_gettime':
>> arch/powerpc/kernel/vdso64/gettime.c:134: undefined reference to `.__get_datapage'
   collect2: error: ld returned 1 exit status

vim +134 arch/powerpc/kernel/vdso64/gettime.c

   130	
   131	notrace int kernel_clock_gettime(clockid_t clk_id, struct timespec *tp)
   132	{
   133		int ret;
 > 134		struct vdso_data *vdata = __get_datapage();

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
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