perf, x86: Extract DS alloc/free functions (65af94ba) · Commits · 戴 / test

arch/x86/kernel/cpu/perf_event_intel_ds.c

+26 −14

Original line number	Original line	Diff line number	Diff line
	@@ -148,6 +148,30 @@ static void release_bts_buffer(int cpu)
	ds->bts_buffer_base = 0;		ds->bts_buffer_base = 0;
	}		}

			static int alloc_ds_buffer(int cpu)
			{
			struct debug_store *ds;

			ds = kzalloc(sizeof(*ds), GFP_KERNEL);
			if (unlikely(!ds))
			return -ENOMEM;

			per_cpu(cpu_hw_events, cpu).ds = ds;

			return 0;
			}

			static void release_ds_buffer(int cpu)
			{
			struct debug_store *ds = per_cpu(cpu_hw_events, cpu).ds;

			if (!ds)
			return;

			per_cpu(cpu_hw_events, cpu).ds = NULL;
			kfree(ds);
			}

	static void release_ds_buffers(void)		static void release_ds_buffers(void)
	{		{
	int cpu;		int cpu;
	@@ -160,16 +184,9 @@ static void release_ds_buffers(void)
	fini_debug_store_on_cpu(cpu);		fini_debug_store_on_cpu(cpu);

	for_each_possible_cpu(cpu) {		for_each_possible_cpu(cpu) {
	struct debug_store *ds = per_cpu(cpu_hw_events, cpu).ds;

	if (!ds)
	continue;

	release_pebs_buffer(cpu);		release_pebs_buffer(cpu);
	release_bts_buffer(cpu);		release_bts_buffer(cpu);
			release_ds_buffer(cpu);
	per_cpu(cpu_hw_events, cpu).ds = NULL;
	kfree(ds);
	}		}
	put_online_cpus();		put_online_cpus();
	}		}
	@@ -184,13 +201,8 @@ static int reserve_ds_buffers(void)
	get_online_cpus();		get_online_cpus();

	for_each_possible_cpu(cpu) {		for_each_possible_cpu(cpu) {
	struct debug_store *ds;		if (alloc_ds_buffer(cpu))

	err = -ENOMEM;
	ds = kzalloc(sizeof(*ds), GFP_KERNEL);
	if (unlikely(!ds))
	break;		break;
	per_cpu(cpu_hw_events, cpu).ds = ds;

	if (alloc_bts_buffer(cpu))		if (alloc_bts_buffer(cpu))
	break;		break;