477 	char __user *usermem;  in copy_user_test()  local
485 	usermem = (char __user *)vm_mmap(NULL, 0, PAGE_SIZE,  in copy_user_test()
488 	if (IS_ERR(usermem)) {  in copy_user_test()
495 	unused = copy_from_user(kmem, usermem, size + 1);  in copy_user_test()
498 	unused = copy_to_user(usermem, kmem, size + 1);  in copy_user_test()
501 	unused = __copy_from_user(kmem, usermem, size + 1);  in copy_user_test()
504 	unused = __copy_to_user(usermem, kmem, size + 1);  in copy_user_test()
507 	unused = __copy_from_user_inatomic(kmem, usermem, size + 1);  in copy_user_test()
510 	unused = __copy_to_user_inatomic(usermem, kmem, size + 1);  in copy_user_test()
513 	unused = strncpy_from_user(kmem, usermem, size + 1);  in copy_user_test()
515 	vm_munmap((unsigned long)usermem, PAGE_SIZE);  in copy_user_test()