From 4eabf533fb1886089ef57e0c8ec52048b1741e39 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Mon, 4 Nov 2024 14:39:20 +0100 Subject: perf/core: Detach 'struct perf_cpu_pmu_context' and 'struct pmu' lifetimes In prepration for being able to unregister a PMU with existing events, it becomes important to detach struct perf_cpu_pmu_context lifetimes from that of struct pmu. Notably struct perf_cpu_pmu_context embeds a struct perf_event_pmu_context that can stay referenced until the last event goes. Signed-off-by: Peter Zijlstra (Intel) Signed-off-by: Ingo Molnar Reviewed-by: Ravi Bangoria Link: https://lore.kernel.org/r/20241104135518.760214287@infradead.org --- include/linux/perf_event.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 5f293e679ab6..76f4265efee9 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -343,7 +343,7 @@ struct pmu { */ unsigned int scope; - struct perf_cpu_pmu_context __percpu *cpu_pmu_context; + struct perf_cpu_pmu_context __percpu **cpu_pmu_context; atomic_t exclusive_cnt; /* < 0: cpu; > 0: tsk */ int task_ctx_nr; int hrtimer_interval_ms; @@ -922,7 +922,7 @@ struct perf_event_pmu_context { struct list_head pinned_active; struct list_head flexible_active; - /* Used to avoid freeing per-cpu perf_event_pmu_context */ + /* Used to identify the per-cpu perf_event_pmu_context */ unsigned int embedded : 1; unsigned int nr_events; -- cgit v1.2.3