On Sun, Mar 12, 2017 at 02:29:27AM +0000, Al Viro wrote: > > Oh, I agree that multiple __put_user() are wrong; I also agree that bulk copy is > the right approach (when we get the unsafe stuff right, we can revisit that, but > I suspect that on quite a few architectures a bulk copy will still give better > time, no matter what). > > > If padding is a concern at all (AFAICS it's not actually an issue now with > > struct statx, but people tend to have different opinions on how careful they > > want to be with padding), then I think we'll just have to start by memsetting > > the whole struct to 0. > > My point is simply that it's worth a comment in that code. Okay, thanks. I'll add a comment about the padding assumption, and I think I'll take the suggestion to use a designated initializer. Then at least all *fields* get initialized by default. And if in the future someone wants to conditionally initialize fields, then they can use ?: or they can do it after the initializer. Either way, at least they won't be able to forget to zero some field. - Eric
