Exemplo n.º 1
0
int __init oprofile_perf_init(struct oprofile_operations *ops)
{
	int cpu, ret = 0;

	ret = init_driverfs();
	if (ret)
		return ret;

	memset(&perf_events, 0, sizeof(perf_events));

	num_counters = perf_num_counters();
	if (num_counters <= 0) {
		pr_info("oprofile: no performance counters\n");
		ret = -ENODEV;
		goto out;
	}

	counter_config = kcalloc(num_counters,
			sizeof(struct op_counter_config), GFP_KERNEL);

	if (!counter_config) {
		pr_info("oprofile: failed to allocate %d "
				"counters\n", num_counters);
		ret = -ENOMEM;
		num_counters = 0;
		goto out;
	}

	for_each_possible_cpu(cpu) {
		perf_events[cpu] = kcalloc(num_counters,
				sizeof(struct perf_event *), GFP_KERNEL);
		if (!perf_events[cpu]) {
			pr_info("oprofile: failed to allocate %d perf events "
					"for cpu %d\n", num_counters, cpu);
			ret = -ENOMEM;
			goto out;
		}
	}

	ops->create_files	= oprofile_perf_create_files;
	ops->setup		= oprofile_perf_setup;
	ops->start		= oprofile_perf_start;
	ops->stop		= oprofile_perf_stop;
	ops->shutdown		= oprofile_perf_stop;
	ops->cpu_type		= op_name_from_perf_id();

	if (!ops->cpu_type)
		ret = -ENODEV;
	else
		pr_info("oprofile: using %s\n", ops->cpu_type);

out:
	if (ret)
		oprofile_perf_exit();

	return ret;
}
Exemplo n.º 2
0
void oprofile_arch_exit(void)
{
	oprofile_perf_exit();
}
Exemplo n.º 3
0
void __exit oprofile_arch_exit(void)
{
	oprofile_perf_exit();
	kfree(sh_pmu_op_name);
}