Re: [PATCH RFC v2] fhandle: expose u64 mount id to name_to_handle_at(2)

quoted

Hell, if you twist my arm I'll even write the patches for this.

I'm also happy to help with that despite very limited time, but I'd
rather avoid doing the misguided mount ID thing.

As I've said earlier, independent of the new handle type returning the
new mount id is useful and needed because it allows the caller to
reliably generate a mount fd for use with open_by_handle_at() via
statmount(). That won't be solved by a new handle type and is racy with
the old mount id. So I intend to accept a version of this patch.