Hi Hauke, It's probably a bug fix that unveils the link errors.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 53cd1ad1a68fd10f677445e04ed63aa9ce39b36b commit: a2724663494f7313f53da10d8c0a729c5e3c4dea mtd: nand: xway: fix build because of module functions date: 4 weeks ago config: mips-xway_defconfig (attached as .config) compiler: mips-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705 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 a2724663494f7313f53da10d8c0a729c5e3c4dea # save the attached .config to linux build tree make.cross ARCH=mips All errors (new ones prefixed by >>): arch/mips/built-in.o: In function `vpe_run': >> (.text+0x14990): undefined reference to `physical_memsize' arch/mips/built-in.o: In function `vpe_run': (.text+0x14994): undefined reference to `physical_memsize' --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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