Add const to prefetch and memadvice

[TApplencourt]

Fix #963

Implementation are correct, spec should follow : )

[TApplencourt]

(I don't know what magic @illuhad have done, but I cannot add him as a reviewer... Smart guy!)

[gmlueck]

LGTM!

Do we need to change the CTS to pass a const pointer to these APIs?

[TApplencourt]

Do we need to change the CTS to pass a const pointer to these APIs?

Oh yes good idea; it should make the CST fail with an implementation implementing the old specification.

Not sure, if it's a blocking change but should be better indeed.

[illuhad]

LGTM!

@TApplencourt I think github only allows requesting reviews from people who have write permissions, which, for whatever reason, I don't have for SYCL-Docs. That's also why my review checkmarks are not green either.

[gmlueck]

I think github only allows requesting reviews from people who have write permissions, which, for whatever reason, I don't have for SYCL-Docs. That's also why my review checkmarks are not green either.

I think it is because you were not part of the sycl-committee group. I just invited you, and it looks like you are a member now.

[illuhad]

Yep, thanks @gmlueck :-)

[TApplencourt]

WG: Merge as clarification.