Re: [GIT PULL] x86/platform updates for v5.10

[Linus Torvalds]

On Mon, Oct 12, 2020 at 3:10 AM Borislav Petkov <bp@xxxxxxx> wrote:
>
> please pull the x86/platform queue.

Hmm. I didn't immediately notice this new warning, because it only
happens with the clang build that I don't do in between every pull.

But this pull causes new warnings from clang:

arch/x86/platform/uv/uv_nmi.c:250:23: warning: implicit conversion
from 'unsigned long' to 'int' changes value from 1152921504606846976
to 0 [-Wconstant-conversion]
                uvh_nmi_mmrx_mask = UVH_EVENT_OCCURRED0_EXTIO_INT0_MASK;
                                  ~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

and I think that warning is correct, and the code is wrong.

In particular, we have

     static int uvh_nmi_mmrx_mask;

so it's a signed 32-bit integer, and the code is treating it like it's
a 64-bit mask.

Of course, it also looks like that 'uvh_nmi_mmrx_mask' thing is a
write-only variable so it doesn't matter, but can we _please_ get this
code fixed ASAP?

                     Linus