Re: Linux 5.19-rc8

Linus Torvalds
2022-07-25T20:41:22Z

On Mon, Jul 25, 2022 at 1:35 PM Yury Norov <yury.norov@gmail.com> wrote:
>
> Here we have 2 ugly options - having pairs of almost identical
> functions, or passing dummy variables. I decided that copy-pasting is
> worse than abusing branch predictor.

The thing is, we have solutions for this - just use a single inline
function, and make it *see* the constant.

That way the compiler can DTRT, either generating two copies (with the
constant elided) or depending on the branch predictor.

That's particularly true in a case like this, when there is only *one*
case for the normal situation (ie little-endian). Because let's face
it, big-endian is completely dead and legacy model.

Linus