[RFC 05/12] x86/mm: Add a helper function to set keyid bits in encrypted VMA's

[Sakkinen, Jarkko]

On Fri, 2018-09-07 at 15:36 -0700, Alison Schofield wrote:
> Store the memory encryption keyid in the upper bits of vm_page_prot
> that match position of keyid, bits 51:46, in a PTE.

Would not do bad to explain the context a bit here. At least I do not
know why you ended up to this bit range.

/Jarkko