linux-kernel - Re: [PATCH v15 11/19] drm/etnaviv: Add etnaviv_gem_obj

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Message-ID: <45b8eb9a0a2b91d85f9dd6b7e66a1796398fa27c.camel@pengutronix.de>
Date: Tue, 01 Oct 2024 16:21:53 +0200
From: Lucas Stach <l.stach@...gutronix.de>
To: Sui Jingfeng <sui.jingfeng@...ux.dev>
Cc: Christian Gmeiner <christian.gmeiner@...il.com>, Russell King
	 <linux+etnaviv@...linux.org.uk>, dri-devel@...ts.freedesktop.org, 
	etnaviv@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v15 11/19] drm/etnaviv: Add etnaviv_gem_obj_remove()
 helper

Am Sonntag, dem 08.09.2024 um 17:43 +0800 schrieb Sui Jingfeng:
> Which is corresonding to the etnaviv_gem_obj_add()
> 
While symmetry is nice, it's still not really symmetric, as this
function isn't exported into the PRIME parts of the driver like
etnaviv_gem_obj_add(). Given that I don't really see how this patch
improves code legibility.

Regards,
Lucas

> Signed-off-by: Sui Jingfeng <sui.jingfeng@...ux.dev>
> ---
>  drivers/gpu/drm/etnaviv/etnaviv_gem.c | 17 +++++++++++++----
>  1 file changed, 13 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem.c b/drivers/gpu/drm/etnaviv/etnaviv_gem.c
> index 39cfece67b90..3732288ff530 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_gem.c
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem.c
> @@ -19,6 +19,8 @@
>  static struct lock_class_key etnaviv_shm_lock_class;
>  static struct lock_class_key etnaviv_userptr_lock_class;
>  
> +static void etnaviv_gem_obj_remove(struct drm_gem_object *obj);
> +
>  static void etnaviv_gem_scatter_map(struct etnaviv_gem_object *etnaviv_obj)
>  {
>  	struct drm_device *dev = etnaviv_obj->base.dev;
> @@ -555,15 +557,12 @@ void etnaviv_gem_free_object(struct drm_gem_object *obj)
>  {
>  	struct drm_device *drm = obj->dev;
>  	struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
> -	struct etnaviv_drm_private *priv = obj->dev->dev_private;
>  	struct etnaviv_vram_mapping *mapping, *tmp;
>  
>  	/* object should not be active */
>  	drm_WARN_ON(drm, is_active(etnaviv_obj));
>  
> -	mutex_lock(&priv->gem_lock);
> -	list_del(&etnaviv_obj->gem_node);
> -	mutex_unlock(&priv->gem_lock);
> +	etnaviv_gem_obj_remove(obj);
>  
>  	list_for_each_entry_safe(mapping, tmp, &etnaviv_obj->vram_list,
>  				 obj_node) {
> @@ -595,6 +594,16 @@ void etnaviv_gem_obj_add(struct drm_device *dev, struct drm_gem_object *obj)
>  	mutex_unlock(&priv->gem_lock);
>  }
>  
> +static void etnaviv_gem_obj_remove(struct drm_gem_object *obj)
> +{
> +	struct etnaviv_drm_private *priv = to_etnaviv_priv(obj->dev);
> +	struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
> +
> +	mutex_lock(&priv->gem_lock);
> +	list_del(&etnaviv_obj->gem_node);
> +	mutex_unlock(&priv->gem_lock);
> +}
> +
>  static const struct vm_operations_struct vm_ops = {
>  	.fault = etnaviv_gem_fault,
>  	.open = drm_gem_vm_open,