kmemusage
struct kmemusage *kmemusage;
struct kmemusage *kup;
struct kmemusage *kup;
kmemusage = km_alloc(round_page(nkmempages * sizeof(struct kmemusage)),
#define btokup(addr) (&kmemusage[((caddr_t)(addr) - kmembase) >> PAGE_SHIFT])
extern struct kmemusage *kmemusage;