[gentoo-user] error compiling kernel: watchdog missing?

[Jarry]

Hi, I'm trying to compile new kernel, but it failed:
--------------------------------------------
   CC      arch/x86/kernel/process_64.o
   CC      arch/x86/kernel/signal.o
   AS      arch/x86/kernel/entry_64.o
   CC      arch/x86/kernel/traps.o
arch/x86/kernel/traps.c: In function âdefault_do_nmiâ:
arch/x86/kernel/traps.c:509:3: error: implicit declaration of function 
ânmi_watchdog_tickâ
arch/x86/kernel/traps.c:512:3: error: implicit declaration of function 
âdo_nmi_callbackâ
make[2]: *** [arch/x86/kernel/traps.o] Error 1
make[1]: *** [arch/x86/kernel] Error 2
make: *** [arch/x86] Error 2
--------------------------------------------

If I understand correctly, function "default_do_nmi" in traps.c
triggered check for nmi_watchdog_tick and do_nmi_callback which
are probably missing.

Q1: how can I find which "make menuconfig" option activated
"default_do_nmi"?

Q2: If I can not disable default_do_nmi, what else do I have to
check/activate in kernel config to fix this error?

Jarry
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