linux-kernel - Re: [PATCH] driver core: move sysfs_dev_char

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Date:   Mon, 27 Mar 2023 18:18:25 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org,
        "Rafael J. Wysocki" <rafael@...nel.org>
Subject: Re: [PATCH] driver core: move sysfs_dev_char_kobj out of class.h

On Mon, Mar 27, 2023 at 6:03 PM Greg Kroah-Hartman
<gregkh@...uxfoundation.org> wrote:
>
> The structure sysfs_dev_char_kobj is local only to the driver core code,
> so move it out of the global class.h file and into the internal base.h
> file as no one else should be touching this symbol.

Good idea.

> Cc: "Rafael J. Wysocki" <rafael@...nel.org>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

Acked-by: Rafael J. Wysocki <rafael@...nel.org>

> ---
>  drivers/base/base.h          | 3 +++
>  include/linux/device/class.h | 1 -
>  2 files changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/base/base.h b/drivers/base/base.h
> index 6659cf1d3a44..6296164bb7f3 100644
> --- a/drivers/base/base.h
> +++ b/drivers/base/base.h
> @@ -191,6 +191,9 @@ const char *device_get_devnode(const struct device *dev, umode_t *mode,
>  extern struct kset *devices_kset;
>  void devices_kset_move_last(struct device *dev);
>
> +/* /sys/dev/char directory */
> +extern struct kobject *sysfs_dev_char_kobj;
> +
>  #if defined(CONFIG_MODULES) && defined(CONFIG_SYSFS)
>  void module_add_driver(struct module *mod, struct device_driver *drv);
>  void module_remove_driver(struct device_driver *drv);
> diff --git a/include/linux/device/class.h b/include/linux/device/class.h
> index af7fefc39364..f7aad64e256a 100644
> --- a/include/linux/device/class.h
> +++ b/include/linux/device/class.h
> @@ -79,7 +79,6 @@ struct class_dev_iter {
>  };
>
>  extern struct kobject *sysfs_dev_block_kobj;
> -extern struct kobject *sysfs_dev_char_kobj;
>
>  int __must_check class_register(struct class *class);
>  void class_unregister(const struct class *class);
> --
> 2.40.0
>