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60a59eaca7
Arena simplifies verification and allows more natural programming. Convert scx_qmap to arena as preparation for further sub-sched work. Move scheduler state from BSS globals and a percpu array map into a single BPF arena map. A shared struct qmap_arena is declared as an __arena global so BPF accesses it directly and userspace reaches it through skel->arena->qa. Scheduling logic unchanged; only memory backing changes. v2: Drop "mutable" from comments. Signed-off-by: Tejun Heo <tj@kernel.org> Reviewed-by: Andrea Righi <arighi@nvidia.com> Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com>