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
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