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;
}
void oprofile_arch_exit(void)
{
oprofile_perf_exit();
}
void __exit oprofile_arch_exit(void)
{
oprofile_perf_exit();
kfree(sh_pmu_op_name);
}