Hi Daniel,

FYI, the error/warning still remains.

tree: git://anongit.freedesktop.org/drm/drm-tip drm-tip head: 1b18cb66428cffa748719cf900b2decac3690029 commit: 7928ca5cc786fdc0269342f1b9e22c2af939b989 [144/320] RFC: debugobjects: capture stack traces at _init() time config: m68k-allyesconfig (attached as .config) compiler: m68k-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 git checkout 7928ca5cc786fdc0269342f1b9e22c2af939b989 # save the attached .config to linux build tree GCC_VERSION=7.2.0 make.cross ARCH=m68k :::::: branch date: 9 hours ago :::::: commit date: 3 weeks ago

All errors (new ones prefixed by >>):

kernel/dma/debug.o: In function `dma_entry_alloc':

...

debug.c:(.text+0x11c2): undefined reference to `save_stack_trace'

kernel/backtracetest.o: In function `backtrace_regression_test': backtracetest.c:(.text+0xd8): undefined reference to `save_stack_trace' mm/slub.o: In function `set_track':

...

slub.c:(.text+0x12b4): undefined reference to `save_stack_trace'

fs/btrfs/ref-verify.o: In function `btrfs_ref_tree_mod': ref-verify.c:(.text+0x92e): undefined reference to `save_stack_trace' lib/debugobjects.o: In function `save_stack.isra.0':

...

debugobjects.c:(.text+0x9f2): undefined reference to `save_stack_trace'

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