Re: [PATCH v3] ARM64: Dynamically allocate cpumasks and increase supported CPUs to 512

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On Fri, 8 Mar 2024, Marek Szyprowski wrote:


It looks that cpufreq-dt and/or opp drivers needs some adjustments
related with this change.
That's strange. Is this with defconfig? I wonder whether NR_CPUS being
larger caused the issue with this specific code. Otherwise
CPUMASK_OFFSTACK may not work that well on arm64.

cpumask handling must use the accessor functions provided in include/linux/cpumask.h for declaring and accessing cpumasks. It is likely related to the driver opencoding one of the accessors.

I.e. you must use alloc_cpumask_var() and not allocate yourself on the stack.





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