[PATCH 4.17 087/101] arm64: Add per-cpu infrastructure to call ARCH_WORKAROUND_2

4.17-stable review patch. If anyone has any objections, please let me know. -- From: Marc Zyngier commit 5cf9ce6e5ea50f805c6188c04ed0daaec7b6887d upstream. In a heterogeneous system, we can end up with both affected and unaffected CPUs. Let's check their status before calling

[PATCH 4.17 087/101] arm64: Add per-cpu infrastructure to call ARCH_WORKAROUND_2

4.17-stable review patch. If anyone has any objections, please let me know. -- From: Marc Zyngier commit 5cf9ce6e5ea50f805c6188c04ed0daaec7b6887d upstream. In a heterogeneous system, we can end up with both affected and unaffected CPUs. Let's check their status before calling