arm64: arch_timer: Allows a CPU-specific erratum to only affect a subset of CPUs
Instead of applying a CPU-specific workaround to all CPUs in the system, allow it to only affect a subset of them (typical big-little case). This is done by turning the erratum pointer into a per-CPU variable. Acked-by: NThomas Gleixner <tglx@linutronix.de> Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>
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