On Tue, 9 Sep 2014, Andrew Morton wrote: > > > > - if (unlikely(ZERO_OR_NULL_PTR(objp))) > > + if (unlikely(ZERO_OR_NULL_PTR(objp) || IS_ERR(objp))) > > return; > > kfree() is quite a hot path to which this will add overhead. And we > have (as far as we know) no code which will actually use this at > present. We could come up with a macro that does both. Basically if objp < 4086 or so (signed comparison) then just return. -- 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>