3419 	struct vm_area_struct *new_vma, *prev;  in copy_vma()  local
3445 	new_vma = __vma_merge(mm, prev, addr, addr + len, vma->vm_flags,  in copy_vma()
3449 	if (new_vma) {  in copy_vma()
3453 		if (unlikely(vma_start >= new_vma->vm_start &&  in copy_vma()
3454 			     vma_start < new_vma->vm_end)) {  in copy_vma()
3467 			VM_BUG_ON_VMA(faulted_in_anon_vma, new_vma);  in copy_vma()
3468 			*vmap = vma = new_vma;  in copy_vma()
3470 		*need_rmap_locks = (new_vma->vm_pgoff <= vma->vm_pgoff);  in copy_vma()
3472 		new_vma = vm_area_dup(vma);  in copy_vma()
3473 		if (!new_vma)  in copy_vma()
3475 		new_vma->vm_start = addr;  in copy_vma()
3476 		new_vma->vm_end = addr + len;  in copy_vma()
3477 		new_vma->vm_pgoff = pgoff;  in copy_vma()
3478 		if (vma_dup_policy(vma, new_vma))  in copy_vma()
3480 		if (anon_vma_clone(new_vma, vma))  in copy_vma()
3482 		if (new_vma->vm_file)  in copy_vma()
3483 			get_file(new_vma->vm_file);  in copy_vma()
3484 		if (new_vma->vm_ops && new_vma->vm_ops->open)  in copy_vma()
3485 			new_vma->vm_ops->open(new_vma);  in copy_vma()
3494 		vm_write_begin(new_vma);  in copy_vma()
3495 		vma_link(mm, new_vma, prev, rb_link, rb_parent);  in copy_vma()
3498 	return new_vma;  in copy_vma()
3501 	mpol_put(vma_policy(new_vma));  in copy_vma()
3503 	vm_area_free(new_vma);  in copy_vma()
3563 static int special_mapping_mremap(struct vm_area_struct *new_vma)  in special_mapping_mremap()  argument
3565 	struct vm_special_mapping *sm = new_vma->vm_private_data;  in special_mapping_mremap()
3567 	if (WARN_ON_ONCE(current->mm != new_vma->vm_mm))  in special_mapping_mremap()
3571 		return sm->mremap(sm, new_vma);  in special_mapping_mremap()