perf: arm_spe: use DEVICE_ATTR_RO macro

Use DEVICE_ATTR_RO() helper instead of plain DEVICE_ATTR(),
which makes the code a bit shorter and easier to read.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20210528061738.23392-1-yuehaibing@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>

diff --git a/drivers/perf/arm_spe_pmu.c b/drivers/perf/arm_spe_pmu.c
index e3711cb..d44bcc2 100644 (file)
--- a/drivers/perf/arm_spe_pmu.c
+++ b/drivers/perf/arm_spe_pmu.c
@@ -231,15 +231,14 @@ static const struct attribute_group arm_spe_pmu_format_group = {
        .attrs  = arm_spe_pmu_formats_attr,
 };
 
-static ssize_t arm_spe_pmu_get_attr_cpumask(struct device *dev,
-                                           struct device_attribute *attr,
-                                           char *buf)
+static ssize_t cpumask_show(struct device *dev,
+                           struct device_attribute *attr, char *buf)
 {
        struct arm_spe_pmu *spe_pmu = dev_get_drvdata(dev);
 
        return cpumap_print_to_pagebuf(true, buf, &spe_pmu->supported_cpus);
 }
-static DEVICE_ATTR(cpumask, S_IRUGO, arm_spe_pmu_get_attr_cpumask, NULL);
+static DEVICE_ATTR_RO(cpumask);
 
 static struct attribute *arm_spe_pmu_attrs[] = {
        &dev_attr_cpumask.attr,