linux-kernel - Re: [PATCH] nvdimm: Use kobj_to

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Date:   Mon, 28 Sep 2020 10:25:02 -0700
From:   Ira Weiny <ira.weiny@...el.com>
To:     Wang Qing <wangqing@...o.com>
Cc:     Dan Williams <dan.j.williams@...el.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Dave Jiang <dave.jiang@...el.com>, linux-nvdimm@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] nvdimm: Use kobj_to_dev() API

On Sat, Sep 26, 2020 at 02:54:17PM +0800, Wang Qing wrote:
> Use kobj_to_dev() instead of container_of().
> 
> Signed-off-by: Wang Qing <wangqing@...o.com>

Reviewed-by: Ira Weiny <ira.weiny@...el.com>

> ---
>  drivers/nvdimm/namespace_devs.c | 2 +-
>  drivers/nvdimm/region_devs.c    | 4 ++--
>  2 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
> index 6da67f4..1d11ca7
> --- a/drivers/nvdimm/namespace_devs.c
> +++ b/drivers/nvdimm/namespace_devs.c
> @@ -1623,7 +1623,7 @@ static struct attribute *nd_namespace_attributes[] = {
>  static umode_t namespace_visible(struct kobject *kobj,
>  		struct attribute *a, int n)
>  {
> -	struct device *dev = container_of(kobj, struct device, kobj);
> +	struct device *dev = kobj_to_dev(kobj);
>  
>  	if (a == &dev_attr_resource.attr && is_namespace_blk(dev))
>  		return 0;
> diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c
> index ef23119..92adfaf
> --- a/drivers/nvdimm/region_devs.c
> +++ b/drivers/nvdimm/region_devs.c
> @@ -644,7 +644,7 @@ static struct attribute *nd_region_attributes[] = {
>  
>  static umode_t region_visible(struct kobject *kobj, struct attribute *a, int n)
>  {
> -	struct device *dev = container_of(kobj, typeof(*dev), kobj);
> +	struct device *dev = kobj_to_dev(kobj);
>  	struct nd_region *nd_region = to_nd_region(dev);
>  	struct nd_interleave_set *nd_set = nd_region->nd_set;
>  	int type = nd_region_to_nstype(nd_region);
> @@ -759,7 +759,7 @@ REGION_MAPPING(31);
>  
>  static umode_t mapping_visible(struct kobject *kobj, struct attribute *a, int n)
>  {
> -	struct device *dev = container_of(kobj, struct device, kobj);
> +	struct device *dev = kobj_to_dev(kobj);
>  	struct nd_region *nd_region = to_nd_region(dev);
>  
>  	if (n < nd_region->ndr_mappings)
> -- 
> 2.7.4
>