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SubjectRe: [PATCH] Fix CPU bitmask truncation
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On Fri, 2002-12-20 at 17:00, Bjorn Helgaas wrote:
> This was an issue with gcc 2.96 on a 64-way IA64 box. I don't have
> access to one at the moment, but as I remember, without the 2.4 changes:
>
> - ((p)->cpus_runnable & (p)->cpus_allowed & (1 << cpu))
> + ((p)->cpus_runnable & (p)->cpus_allowed & (1UL << cpu))
>
> nothing would get scheduled on CPUs 32-63. I guess those changes
> aren't controversial, though.

Is this a C quirk or a compiler bug ?

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