236 		unsigned long old_addr, unsigned long old_len,  in move_vma()  argument
264 	err = ksm_madvise(vma, old_addr, old_addr + old_len,  in move_vma()
275 	moved_len = move_page_tables(vma, old_addr, new_vma, new_addr, old_len,  in move_vma()
277 	if (moved_len < old_len) {  in move_vma()
286 		old_len = new_len;  in move_vma()
301 		excess = vma->vm_end - vma->vm_start - old_len;  in move_vma()
303 		    old_addr + old_len < vma->vm_end)  in move_vma()
319 	if (do_munmap(mm, old_addr, old_len) < 0) {  in move_vma()
342 	unsigned long old_len, unsigned long new_len, unsigned long *p)  in vma_to_resize()  argument
354 	if (old_len > vma->vm_end - addr)  in vma_to_resize()
358 	if (new_len > old_len) {  in vma_to_resize()
373 		locked += new_len - old_len;  in vma_to_resize()
378 	if (!may_expand_vm(mm, (new_len - old_len) >> PAGE_SHIFT))  in vma_to_resize()
382 		unsigned long charged = (new_len - old_len) >> PAGE_SHIFT;  in vma_to_resize()
391 static unsigned long mremap_to(unsigned long addr, unsigned long old_len,  in mremap_to()  argument
412 	if ((addr <= new_addr) && (addr+old_len) > new_addr)  in mremap_to()
419 	if (old_len >= new_len) {  in mremap_to()
420 		ret = do_munmap(mm, addr+new_len, old_len - new_len);  in mremap_to()
421 		if (ret && old_len != new_len)  in mremap_to()
423 		old_len = new_len;  in mremap_to()
426 	vma = vma_to_resize(addr, old_len, new_len, &charged);  in mremap_to()
442 	ret = move_vma(vma, addr, old_len, new_len, new_addr, locked);  in mremap_to()
472 SYSCALL_DEFINE5(mremap, unsigned long, addr, unsigned long, old_len,  in SYSCALL_DEFINE5()  argument
491 	old_len = PAGE_ALIGN(old_len);  in SYSCALL_DEFINE5()
505 		ret = mremap_to(addr, old_len, new_addr, new_len,  in SYSCALL_DEFINE5()
515 	if (old_len >= new_len) {  in SYSCALL_DEFINE5()
516 		ret = do_munmap(mm, addr+new_len, old_len - new_len);  in SYSCALL_DEFINE5()
517 		if (ret && old_len != new_len)  in SYSCALL_DEFINE5()
526 	vma = vma_to_resize(addr, old_len, new_len, &charged);  in SYSCALL_DEFINE5()
534 	if (old_len == vma->vm_end - addr) {  in SYSCALL_DEFINE5()
536 		if (vma_expandable(vma, new_len - old_len)) {  in SYSCALL_DEFINE5()
537 			int pages = (new_len - old_len) >> PAGE_SHIFT;  in SYSCALL_DEFINE5()
575 		ret = move_vma(vma, addr, old_len, new_len, new_addr, &locked);  in SYSCALL_DEFINE5()
581 	if (locked && new_len > old_len)  in SYSCALL_DEFINE5()
582 		mm_populate(new_addr + old_len, new_len - old_len);  in SYSCALL_DEFINE5()