extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
unsigned long start, unsigned long end);
extern struct vm_struct *remove_vm_area(void *addr);
+extern struct vm_struct *__remove_vm_area(void *addr);
extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
struct page ***pages);
extern void unmap_vm_area(struct vm_struct *area);