vm_area_dup
struct vm_area_struct *vm_area_dup(struct vm_area_struct *);
tmp = vm_area_dup(mpnt);
new = vm_area_dup(vma);
new_vma = vm_area_dup(vma);
new = vm_area_dup(vma);
struct vm_area_struct *vm_area_dup(struct vm_area_struct *orig);