Re: [RFC/HACK] x86: Fast return to kernel

[Linus Torvalds]

On Fri, May 2, 2014 at 2:04 PM, Andy Lutomirski <luto@xxxxxxxxxxxxxx> wrote:
>
> Because otherwise I'd have to keep track of whether it's a zeroentry
> or an errorentry.  I can't stuff the offset in a register without even
> more stack hackery, since there are no available registers there.  I
> could split the whole thing into two code paths, I guess.

Ahh. Never mind. I didn't think about the fact that the error entry
case had one more field on the stack. Your approach is all fine, it
was me not seeing the problem.

          Linus
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