Symbol: IST_INDEX_NMI
arch/x86/kernel/cpu/common.c
2377
tss->x86_tss.ist[IST_INDEX_NMI] = __this_cpu_ist_top_va(NMI);
arch/x86/kernel/idt.c
86
ISTG(X86_TRAP_NMI, asm_exc_nmi, IST_INDEX_NMI),