[drm-intel:topic/drm-misc 1/2] backtracetest.c:undefined reference to `save_stack_trace'

[kbuild test robot]

tree:   git://anongit.freedesktop.org/drm-intel topic/drm-misc
head:   77d150b90d58ae6a43bf67af28feb26384d06cd6
commit: cd456f8d06d2036e1e013136c3fbf5721d04f6d7 [1/2] drm: Restrict stackdepot usage to builtin drm.ko
config: m68k-allyesconfig (attached as .config)
compiler: m68k-linux-gcc (GCC) 4.9.0
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout cd456f8d06d2036e1e013136c3fbf5721d04f6d7
        # save the attached .config to linux build tree
        make.cross ARCH=m68k 

All errors (new ones prefixed by >>):

   kernel/built-in.o: In function `backtrace_regression_test':
>> backtracetest.c:(.text+0x550d4): undefined reference to `save_stack_trace'
   mm/built-in.o: In function `set_track':
   slub.c:(.text+0x41414): undefined reference to `save_stack_trace'
   drivers/built-in.o: In function `save_stack.isra.7':
>> drm_mm.c:(.text+0x16be82): undefined reference to `save_stack_trace'

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