Re: [oliver.sang@xxxxxxxxx: [cpumask] b9a7ecc71f: WARNING:at_include/linux/cpumask.h:#__is_kernel_percpu_address]

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On Sat, Oct 01, 2022 at 09:20:53AM -0700, Linus Torvalds wrote:
> On Fri, Sep 30, 2022 at 6:51 PM Yury Norov <yury.norov@xxxxxxxxx> wrote:
> >
> > The commit  b9a7ecc71fe582e ("cpumask: fix checking valid cpu range")
> > fixes broken cpumask_check(), which for now doesn't warn user when it
> > should. After the fix, I observed many false-positive warnings which
> > were addressed in the following patches.
> 
> Are all the false positives fixed?

I build-tested on x86_64 and arm64. All fixed except for those
generated by cpumask_next_wrap(). And I'm not even sure they
are false positives.

This is what I'm working on right now. Hope moving it in next
merge window.
 
> I suspect that to avoid any automation noise, you should just rebase
> so that the fixes come first. Otherwise we'll end up wasting a lot of
> time on the noise.
> 
> This is not that different from introducing new buil;d-time warnings:
> the things they point out need to be fixed before the warning can be
> integrated, or it causes bisection problems.

OK, I'll reorder the patches. Thanks for your help.




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