__user with scalar data types

[Al Viro]

On Mon, Jun 19, 2017 at 10:15:09AM -0600, Jordan Crouse wrote:

> Which raised a bikeshed debate over whether it is appropriate to mark a scalar
> type as __user.  My opinion is that it is appropriate because __user should mark
> user memory regardless of the container.

What the hell?  __user is a qualifier like const, volatile, etc.  It's a property
of *pointer* *type*.  Not some nebulous "marks userland memory" thing.

> I'm looking for opinions or semi-authoritative edicts to determine if we should
> either start changing our uapi headers or go off and try to figure out how to
> make sparse understand this particular usage.

Stop cargo-culting, please.