extern void consistent_free(void *vaddr);
extern void consistent_sync(void *vaddr, size_t size, int direction);
extern void consistent_sync_page(struct page *page, unsigned long offset,
extern void consistent_free(void *vaddr);
extern void consistent_sync(void *vaddr, size_t size, int direction);
extern void consistent_sync_page(struct page *page, unsigned long offset,