static int __init perf_init()

in kernel/perf.c [487:529]

• 34 lines of code
• 12 McCabe index (conditional complexity)

static int __init perf_init(void)
{
	int ret;

	/* Determine correct processor interface to use */
	bitmask_array = perf_bitmasks;

	if (boot_cpu_data.cpu_type == pcxu ||
	    boot_cpu_data.cpu_type == pcxu_) {
		perf_processor_interface = ONYX_INTF;
	} else if (boot_cpu_data.cpu_type == pcxw ||
		 boot_cpu_data.cpu_type == pcxw_ ||
		 boot_cpu_data.cpu_type == pcxw2 ||
		 boot_cpu_data.cpu_type == mako ||
		 boot_cpu_data.cpu_type == mako2) {
		perf_processor_interface = CUDA_INTF;
		if (boot_cpu_data.cpu_type == pcxw2 ||
		    boot_cpu_data.cpu_type == mako ||
		    boot_cpu_data.cpu_type == mako2)
			bitmask_array = perf_bitmasks_piranha;
	} else {
		perf_processor_interface = UNKNOWN_INTF;
		printk("Performance monitoring counters not supported on this processor\n");
		return -ENODEV;
	}

	ret = misc_register(&perf_dev);
	if (ret) {
		printk(KERN_ERR "Performance monitoring counters: "
			"cannot register misc device.\n");
		return ret;
	}

	/* Patch the images to match the system */
    	perf_patch_images();

	/* TODO: this only lets us access the first cpu.. what to do for SMP? */
	cpu_device = per_cpu(cpu_data, 0).dev;
	printk("Performance monitoring counters enabled for %s\n",
		per_cpu(cpu_data, 0).dev->name);

	return 0;
}