2013/10/18 Michael S. Tsirkin <m...@redhat.com>: > On Fri, Oct 18, 2013 at 05:27:55PM +0800, Axel Lin wrote: >> Hi Michael, >> >> I got below build error for nommu if CONFIG_DEBUG_ATOMIC_SLEEP is selected. >> Also got the same build error if CONFIG_PROVE_LOCKING is selected. >> >> Seems this issue is introduced by commit 662bbcb2747c2 >> "mm, sched: Allow uaccess in atomic with pagefault_disable()". >> >> arch/arm/kernel/built-in.o: In function `arch_ptrace': >> arch/arm/kernel/ptrace.c:852: undefined reference to `might_fault' >> arch/arm/kernel/built-in.o: In function `restore_sigframe': >> arch/arm/kernel/signal.c:173: undefined reference to `might_fault' >> arch/arm/kernel/signal.c:174: undefined reference to `might_fault' >> arch/arm/kernel/signal.c:175: undefined reference to `might_fault' >> arch/arm/kernel/signal.c:176: undefined reference to `might_fault' >> arch/arm/kernel/built-in.o:arch/arm/kernel/signal.c:177: more undefined >> references to `might_fault' follow >> make: *** [vmlinux] Error 1 >> >> Regards, >> Axel > > Can you send/upload your full .config please?
I patch the kernel to port it for an arm7tdmi SoC. But I think you can easily reproduce it by simply select ARM7TDMI cpu and then enable either CONFIG_DEBUG_ATOMIC_SLEEP or CONFIG_PROVE_LOCKING. Note, might_fault is implemented in mm/memory.c which is not built if !CONFIG_MMU. Regards, Axel -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
