extern void *kmem_alloc(size_t, unsigned int __nocast);
extern void *kmem_zalloc(size_t, unsigned int __nocast);
extern void *kmem_zalloc_greedy(size_t *, size_t, size_t, unsigned int __nocast);
extern void *kmem_alloc(size_t, unsigned int __nocast);
extern void *kmem_zalloc(size_t, unsigned int __nocast);
extern void *kmem_zalloc_greedy(size_t *, size_t, size_t, unsigned int __nocast);