[PATCH][next] treewide: uapi: Replace zero-length arrays with flexible-array members

[Jason Gunthorpe]

On Tue, Jun 28, 2022 at 10:54:58AM -0700, Kees Cook wrote:

 
> which must also be assuming it's a header. So probably better to just
> drop the driver_data field? I don't see anything using it (that I can
> find) besides as a sanity-check that the field exists and is at the end
> of the struct.

The field is guaranteeing alignment of the following structure. IIRC
there are a few cases that we don't have a u64 already to force this.

Jason