>>> I don't understand it. How can we get rid of the warning? >> >> See cpu_device_release() for example. > > If we implement a function like cpu_device_release(), the warning > disappears. But the comment says in the function "Never copy this way...". > So I think it is illegal way. What does "illegal" mean? You still haven't explain any benefit of your code. If there is zero benefit, just kill it. I believe everybody think so. Again, Which benefit do you have? >>>> Why do we need this node_device_release() implementation? >>> >>> I think that this is a manner of releasing object related kobject. >> >> No. Usually we never call memset() from release callback. > > What we want to release is a part of array, not a pointer. > Therefore, there is only this way instead of kfree(). Why? Before your patch, we don't have memset() and did work it. I can't understand what mean "only way". -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>