linux-kernel - Re: [Intel-gfx] [PATCH -next] drm/i915: use DEVICE_ATTR

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Message-ID: <80d29f19-f429-875f-d255-259a73051f51@linux.intel.com>
Date:   Wed, 2 Jun 2021 10:48:23 +0100
From:   Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>
To:     YueHaibing <yuehaibing@...wei.com>, jani.nikula@...ux.intel.com,
        joonas.lahtinen@...ux.intel.com, rodrigo.vivi@...el.com,
        airlied@...ux.ie, daniel@...ll.ch, chris@...is-wilson.co.uk,
        tvrtko.ursulin@...el.com
Cc:     intel-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org
Subject: Re: [Intel-gfx] [PATCH -next] drm/i915: use DEVICE_ATTR_RO macro


On 01/06/2021 10:15, Tvrtko Ursulin wrote:
> 
> On 28/05/2021 11:04, YueHaibing wrote:
>> 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@...wei.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,
>>
> 
> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@...el.com>

Pushed thanks for the patch!

Regards,

Tvrtko