[PATCH -next] drm/i915: use DEVICE_ATTR_RO macro

[YueHaibing]

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 <yuehaib...@huawei.com>
---
 drivers/gpu/drm/i915/i915_pmu.c   |  8 +++-----
 drivers/gpu/drm/i915/i915_sysfs.c | 30 +++++++++++++++---------------
 2 files changed, 18 insertions(+), 20 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_pmu.c b/drivers/gpu/drm/i915/i915_pmu.c
index 41651ac255fa..fb215929b05b 100644
--- a/drivers/gpu/drm/i915/i915_pmu.c
+++ b/drivers/gpu/drm/i915/i915_pmu.c
@@ -834,15 +834,13 @@ static ssize_t i915_pmu_event_show(struct device *dev,
        return sprintf(buf, "config=0x%lx\n", eattr->val);
 }
 
-static ssize_t
-i915_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)
 {
        return cpumap_print_to_pagebuf(true, buf, &i915_pmu_cpumask);
 }
 
-static DEVICE_ATTR(cpumask, 0444, i915_pmu_get_attr_cpumask, NULL);
+static DEVICE_ATTR_RO(cpumask);
 
 static struct attribute *i915_cpumask_attrs[] = {
        &dev_attr_cpumask.attr,
diff --git a/drivers/gpu/drm/i915/i915_sysfs.c 
b/drivers/gpu/drm/i915/i915_sysfs.c
index 4c6b5d52b5ca..183517d1a73d 100644
--- a/drivers/gpu/drm/i915/i915_sysfs.c
+++ b/drivers/gpu/drm/i915/i915_sysfs.c
@@ -58,8 +58,8 @@ static u32 calc_residency(struct drm_i915_private *dev_priv,
        return DIV_ROUND_CLOSEST_ULL(res, 1000);
 }
 
-static ssize_t
-show_rc6_mask(struct device *kdev, struct device_attribute *attr, char *buf)
+static ssize_t rc6_enable_show(struct device *kdev,
+                              struct device_attribute *attr, char *buf)
 {
        struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
        unsigned int mask;
@@ -75,43 +75,43 @@ show_rc6_mask(struct device *kdev, struct device_attribute 
*attr, char *buf)
        return sysfs_emit(buf, "%x\n", mask);
 }
 
-static ssize_t
-show_rc6_ms(struct device *kdev, struct device_attribute *attr, char *buf)
+static ssize_t rc6_residency_ms_show(struct device *kdev,
+                                    struct device_attribute *attr, char *buf)
 {
        struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
        u32 rc6_residency = calc_residency(dev_priv, GEN6_GT_GFX_RC6);
        return sysfs_emit(buf, "%u\n", rc6_residency);
 }
 
-static ssize_t
-show_rc6p_ms(struct device *kdev, struct device_attribute *attr, char *buf)
+static ssize_t rc6p_residency_ms_show(struct device *kdev,
+                                     struct device_attribute *attr, char *buf)
 {
        struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
        u32 rc6p_residency = calc_residency(dev_priv, GEN6_GT_GFX_RC6p);
        return sysfs_emit(buf, "%u\n", rc6p_residency);
 }
 
-static ssize_t
-show_rc6pp_ms(struct device *kdev, struct device_attribute *attr, char *buf)
+static ssize_t rc6pp_residency_ms_show(struct device *kdev,
+                                      struct device_attribute *attr, char *buf)
 {
        struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
        u32 rc6pp_residency = calc_residency(dev_priv, GEN6_GT_GFX_RC6pp);
        return sysfs_emit(buf, "%u\n", rc6pp_residency);
 }
 
-static ssize_t
-show_media_rc6_ms(struct device *kdev, struct device_attribute *attr, char 
*buf)
+static ssize_t media_rc6_residency_ms_show(struct device *kdev,
+                                          struct device_attribute *attr, char 
*buf)
 {
        struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
        u32 rc6_residency = calc_residency(dev_priv, VLV_GT_MEDIA_RC6);
        return sysfs_emit(buf, "%u\n", rc6_residency);
 }
 
-static DEVICE_ATTR(rc6_enable, S_IRUGO, show_rc6_mask, NULL);
-static DEVICE_ATTR(rc6_residency_ms, S_IRUGO, show_rc6_ms, NULL);
-static DEVICE_ATTR(rc6p_residency_ms, S_IRUGO, show_rc6p_ms, NULL);
-static DEVICE_ATTR(rc6pp_residency_ms, S_IRUGO, show_rc6pp_ms, NULL);
-static DEVICE_ATTR(media_rc6_residency_ms, S_IRUGO, show_media_rc6_ms, NULL);
+static DEVICE_ATTR_RO(rc6_enable);
+static DEVICE_ATTR_RO(rc6_residency_ms);
+static DEVICE_ATTR_RO(rc6p_residency_ms);
+static DEVICE_ATTR_RO(rc6pp_residency_ms);
+static DEVICE_ATTR_RO(media_rc6_residency_ms);
 
 static struct attribute *rc6_attrs[] = {
        &dev_attr_rc6_enable.attr,
-- 
2.17.1