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perf: arm_pmu: use DEVICE_ATTR_RO macro

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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/20210528014130.7708-1-yuehaibing@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
YueHaibing 2021-05-28 09:41:30 +08:00 committed by Will Deacon
parent 2db5223731
commit 29c043760e
1 changed files with 3 additions and 3 deletions
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6
drivers/perf/arm_pmu.c
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@ -563,14 +563,14 @@ static int armpmu_filter_match(struct perf_event *event)
return ret; return ret;
} }
static ssize_t armpmu_cpumask_show(struct device *dev, static ssize_t cpus_show(struct device *dev,
struct device_attribute *attr, char *buf) struct device_attribute *attr, char *buf)
{ {
struct arm_pmu *armpmu = to_arm_pmu(dev_get_drvdata(dev)); struct arm_pmu *armpmu = to_arm_pmu(dev_get_drvdata(dev));
return cpumap_print_to_pagebuf(true, buf, &armpmu->supported_cpus); return cpumap_print_to_pagebuf(true, buf, &armpmu->supported_cpus);
} }
static DEVICE_ATTR(cpus, S_IRUGO, armpmu_cpumask_show, NULL); static DEVICE_ATTR_RO(cpus);
static struct attribute *armpmu_common_attrs[] = { static struct attribute *armpmu_common_attrs[] = {
&dev_attr_cpus.attr, &dev_attr_cpus.attr,