vma->vm_mm = current->mm;
vma->vm_start = current->thread.rbs_bot & PAGE_MASK;
vma->vm_end = vma->vm_start + PAGE_SIZE;
vma->vm_page_prot = protection_map[VM_DATA_DEFAULT_FLAGS & 0x7];
vma->vm_mm = current->mm;
vma->vm_start = current->thread.rbs_bot & PAGE_MASK;
vma->vm_end = vma->vm_start + PAGE_SIZE;
vma->vm_page_prot = protection_map[VM_DATA_DEFAULT_FLAGS & 0x7];