Re: [PATCH] MIPS: Make CP0 config registers readable via sysfs.

[Florian Fainelli <florian@openwrt.org>]

Hello Steven,

Le 12/07/12 06:31, Steven J. Hill a écrit :

[snip]

> +
> +#define __BUILD_CP0_SYSFS(reg)					\
> +static DEFINE_PER_CPU(unsigned int, cpu_config##reg);		\
> +static ssize_t show_config##reg(struct device *dev,		\
> +		struct device_attribute *attr, char *buf)	\
> +{								\
> +	struct cpu *cpu = container_of(dev, struct cpu, dev);	\
> +	int n = snprintf(buf, PAGE_SIZE-2, "%x\n",		\
> +		per_cpu(cpu_config##reg, cpu->dev.id));		\
> +	return n;						\
> +}								\
> +static DEVICE_ATTR(config##reg, 0444, show_config##reg, NULL);
> +
> +__BUILD_CP0_SYSFS(0)
> +__BUILD_CP0_SYSFS(1)
> +__BUILD_CP0_SYSFS(2)
> +__BUILD_CP0_SYSFS(3)
> +__BUILD_CP0_SYSFS(4)
> +__BUILD_CP0_SYSFS(5)
> +__BUILD_CP0_SYSFS(6)
> +__BUILD_CP0_SYSFS(7)
> +
> +static void read_c0_registers(void *arg)
> +{
> +	struct device *dev = get_cpu_device(smp_processor_id());
> +	struct cpu *cpu;
> +	int ok;
> +
> +	if (dev != NULL) {
> +		cpu = container_of(dev, struct cpu, dev);
> +		per_cpu(cpu_config0, cpu->dev.id) = read_c0_config();
> +		device_create_file(dev, &dev_attr_config0);
> +		ok = per_cpu(cpu_config0, cpu->dev.id) & MIPS_CONF_M;
> +	} else

Is there any reason you are not using a macro here too?
--
Florian