On Sun, 5 Jun 2016 12:33:29 +0800 kbuild test robot <fengguang.wu@xxxxxxxxx> wrote: > 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: 049ec1b5a76d34a6980cccdb7c0baeb4eed7a993 > commit: 888cdbc2c9a76a0e450f533b1957cdbfe7d483d5 hugetlb: fix compile error on tile > date: 5 months ago > config: tile-allnoconfig (attached as .config) > compiler: tilegx-linux-gcc (GCC) 4.6.2 > 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 888cdbc2c9a76a0e450f533b1957cdbfe7d483d5 > # save the attached .config to linux build tree > make.cross ARCH=tile > > All errors (new ones prefixed by >>): > > arch/tile/built-in.o: In function `setup_arch': > >> (.init.text+0x15d8): undefined reference to `early_panic' > arch/tile/built-in.o: In function `setup_arch': > (.init.text+0x1610): undefined reference to `early_panic' > arch/tile/built-in.o: In function `setup_arch': > (.init.text+0x1800): undefined reference to `early_panic' > arch/tile/built-in.o: In function `setup_arch': > (.init.text+0x1828): undefined reference to `early_panic' > arch/tile/built-in.o: In function `setup_arch': > (.init.text+0x1bd8): undefined reference to `early_panic' > arch/tile/built-in.o:(.init.text+0x1c18): more undefined references to `early_panic' follow This? From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Subject: tile: early_printk.o is always required arch/tile/setup.o is always compiled, and it requires early_panic() and hence early_printk(), so we must always build and link early_printk.o. Reported-by: kbuild test robot <fengguang.wu@xxxxxxxxx> Cc: Chris Metcalf <cmetcalf@xxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- arch/tile/Kconfig | 1 + 1 file changed, 1 insertion(+) diff -puN arch/tile/Kconfig~tile-early_printko-is-always-required arch/tile/Kconfig --- a/arch/tile/Kconfig~tile-early_printko-is-always-required +++ a/arch/tile/Kconfig @@ -14,6 +14,7 @@ config TILE select GENERIC_FIND_FIRST_BIT select GENERIC_IRQ_PROBE select GENERIC_IRQ_SHOW + select EARLY_PRINTK select GENERIC_PENDING_IRQ if SMP select GENERIC_STRNCPY_FROM_USER select GENERIC_STRNLEN_USER _ -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>