Re: [PATCH] x86/nospec: Fixup array_index_nospec_mask() asm constraint

[Dan Williams]

On Tue, Feb 6, 2018 at 5:50 PM, Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
> On Tue, Feb 6, 2018 at 5:33 PM, Dan Williams <dan.j.williams@xxxxxxxxx> wrote:
>> Allow the compiler to handle @size as an immediate value rather than
>> allocating a register.
>
> Actually, maybe that "ir" should be "g".
>
> Because it's fine if it's a memory location too. "cmp" takes pretty
> much anything, as long as the thing we compare _to_ is a register.

Ok, no worries I'll do a v2. In fact you suggested 'g' in your initial
version and I lost that along the way while wrestling with why the
compiler miscompiled it until I put it in a static inline rather than
a macro.