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Commit fa032f21 authored by Linux Build Service Account's avatar Linux Build Service Account Committed by Gerrit - the friendly Code Review server
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Merge "perf: stop deadlock if attempt to bring cpu up fails"

parents 91fbc6b4 595ba75f

arch/arm64/kernel/perf_event.c

+0 −1
Original line number Diff line number Diff line
@@ -581,7 +581,6 @@ static void __init armpmu_init(struct arm_pmu *armpmu) 
		.start		= armpmu_start,

		.stop		= armpmu_stop,

		.read		= armpmu_read,

		.events_across_hotplug = 1,

	};

}

kernel/events/core.c

+1 −34
Original line number Diff line number Diff line
@@ -1540,32 +1540,6 @@ static int __perf_remove_from_context(void *info) 
	return 0;

}





#ifdef CONFIG_SMP

static void perf_retry_remove(struct perf_event *event,

			      struct remove_event *rep)

{

	int up_ret;

	/*

	 * CPU was offline. Bring it online so we can

	 * gracefully exit a perf context.

	 */

	up_ret = cpu_up(event->cpu);

	if (!up_ret)

		/* Try the remove call once again. */

		cpu_function_call(event->cpu, __perf_remove_from_context,

				  rep);

	else

		pr_err("Failed to bring up CPU: %d, ret: %d\n",

		       event->cpu, up_ret);

}

#else

static void perf_retry_remove(struct perf_event *event,

			      struct remove_event *rep)

{

}

#endif



/*

 * Remove the event from a task's (or a CPU's) list of events.

 *
@@ -1601,9 +1575,6 @@ static void __ref perf_remove_from_context(struct perf_event *event, 
		 */

		ret = cpu_function_call(event->cpu, __perf_remove_from_context,

					&re);

		if (ret == -ENXIO)

			perf_retry_remove(event, &re);



		return;

	}
@@ -6185,7 +6156,6 @@ static struct pmu perf_swevent = { 
	.start		= perf_swevent_start,

	.stop		= perf_swevent_stop,

	.read		= perf_swevent_read,

	.events_across_hotplug = 1,

};



#ifdef CONFIG_EVENT_TRACING
@@ -6303,7 +6273,6 @@ static struct pmu perf_tracepoint = { 
	.start		= perf_swevent_start,

	.stop		= perf_swevent_stop,

	.read		= perf_swevent_read,

	.events_across_hotplug = 1,

};



static inline void perf_tp_register(void)
@@ -6529,7 +6498,6 @@ static struct pmu perf_cpu_clock = { 
	.start		= cpu_clock_event_start,

	.stop		= cpu_clock_event_stop,

	.read		= cpu_clock_event_read,

	.events_across_hotplug = 1,

};



/*
@@ -6608,7 +6576,6 @@ static struct pmu perf_task_clock = { 
	.start		= task_clock_event_start,

	.stop		= task_clock_event_stop,

	.read		= task_clock_event_read,

	.events_across_hotplug = 1,

};



static void perf_pmu_nop_void(struct pmu *pmu)

kernel/events/hw_breakpoint.c

+0 −1
Original line number Diff line number Diff line
@@ -614,7 +614,6 @@ static struct pmu perf_breakpoint = { 
	.start		= hw_breakpoint_start,

	.stop		= hw_breakpoint_stop,

	.read		= hw_breakpoint_pmu_read,

	.events_across_hotplug = 1,

};



int __init init_hw_breakpoint(void)