Re: [PATCH 5/8] x86/head: remove useless zeroed word

Andi Kleen
2016-08-22T21:48:49Z

Josh Poimboeuf <jpoimboe@redhat.com> writes:

> This zeroed word has no apparent purpose, so remove it.
>
> Brian Gerst says:
>
> "FYI the word used to be the SS segment selector for the LSS
> instruction, which isn't needed in 64-bit mode."
>

Seems dangerous. It wouldn't surprise me if some CPUs or x86 emulations
load it anyways and trigger page faults if there is really nothing
there.

-Andi