linux-kernel - Re: [PATCH] qemu_fw_cfg: use default_groups in kobj

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Message-ID: <20220105175546-mutt-send-email-mst@kernel.org>
Date:   Wed, 5 Jan 2022 17:56:26 -0500
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, Gabriel Somlo <somlo@....edu>,
        qemu-devel@...gnu.org
Subject: Re: [PATCH] qemu_fw_cfg: use default_groups in kobj_type

On Wed, Jan 05, 2022 at 07:31:33PM +0100, Greg Kroah-Hartman wrote:
> There are currently 2 ways to create a set of sysfs files for a
> kobj_type, through the default_attrs field, and the default_groups
> field.  Move the firmware qemu_fw_cfg sysfs code to use default_groups
> field which has been the preferred way since aa30f47cf666 ("kobject: Add
> support for default attribute groups to kobj_type") so that we can soon
> get rid of the obsolete default_attrs field.
> 
> Cc: Gabriel Somlo <somlo@....edu>
> Cc: "Michael S. Tsirkin" <mst@...hat.com>
> Cc: qemu-devel@...gnu.org
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

OK then you know best I guess

Acked-by: Michael S. Tsirkin <mst@...hat.com>

feel free to queue.

> ---
>  drivers/firmware/qemu_fw_cfg.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/firmware/qemu_fw_cfg.c b/drivers/firmware/qemu_fw_cfg.c
> index 172c751a4f6c..c62f05420d32 100644
> --- a/drivers/firmware/qemu_fw_cfg.c
> +++ b/drivers/firmware/qemu_fw_cfg.c
> @@ -395,7 +395,7 @@ static void fw_cfg_sysfs_cache_cleanup(void)
>  	}
>  }
>  
> -/* default_attrs: per-entry attributes and show methods */
> +/* per-entry attributes and show methods */
>  
>  #define FW_CFG_SYSFS_ATTR(_attr) \
>  struct fw_cfg_sysfs_attribute fw_cfg_sysfs_attr_##_attr = { \
> @@ -428,6 +428,7 @@ static struct attribute *fw_cfg_sysfs_entry_attrs[] = {
>  	&fw_cfg_sysfs_attr_name.attr,
>  	NULL,
>  };
> +ATTRIBUTE_GROUPS(fw_cfg_sysfs_entry);
>  
>  /* sysfs_ops: find fw_cfg_[entry, attribute] and call appropriate show method */
>  static ssize_t fw_cfg_sysfs_attr_show(struct kobject *kobj, struct attribute *a,
> @@ -454,7 +455,7 @@ static void fw_cfg_sysfs_release_entry(struct kobject *kobj)
>  
>  /* kobj_type: ties together all properties required to register an entry */
>  static struct kobj_type fw_cfg_sysfs_entry_ktype = {
> -	.default_attrs = fw_cfg_sysfs_entry_attrs,
> +	.default_groups = fw_cfg_sysfs_entry_groups,
>  	.sysfs_ops = &fw_cfg_sysfs_attr_ops,
>  	.release = fw_cfg_sysfs_release_entry,
>  };
> -- 
> 2.34.1