KTR_ENTRIES
#define KTR_ENTRIES_MASK (KTR_ENTRIES - 1)
#if (KTR_ENTRIES < 256)
#define KTR_ENTRIES_BOOT0 KTR_ENTRIES
kcpu->ktr_buf = kmalloc(KTR_ENTRIES * sizeof(struct ktr_entry),
ktr_entries = KTR_ENTRIES;
#ifndef KTR_ENTRIES
#elif (KTR_ENTRIES & KTR_ENTRIES - 1)