On Fri, Feb 9, 2018 at 1:09 PM, Pavel Machek <pa...@ucw.cz> wrote:
>
> Hardware supports PCID even on 32-bit kernels, no?

We're not adding support for it even if it were possible. No way.

Christ, even if you want to run 32-bit user code, you'd better run a
64-bit kernel. Backporting the PCID bits to something that no actual
real developer will ever use is crazy and unacceptable.

             Linus

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