Re: [PATCH 3/7] driver core: class: remove subsystem private pointer from struct class

[Rafael J. Wysocki]

On Fri, Mar 31, 2023 at 11:33 AM Greg Kroah-Hartman
<gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
>
> Now that the last users of the subsystem private pointer in struct class
> are gone, the pointer can be removed, as no one is using it.  One step
> closer to allowing struct class to be const and moved into read-only
> memory.
>
> Cc: "Rafael J. Wysocki" <rafael@xxxxxxxxxx>
> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

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

> ---
>  drivers/base/class.c         | 4 ----
>  include/linux/device/class.h | 2 --
>  2 files changed, 6 deletions(-)
>
> diff --git a/drivers/base/class.c b/drivers/base/class.c
> index a8a1bf976290..fcfb295363cc 100644
> --- a/drivers/base/class.c
> +++ b/drivers/base/class.c
> @@ -97,8 +97,6 @@ static void class_release(struct kobject *kobj)
>
>         pr_debug("class '%s': release.\n", class->name);
>
> -       class->p = NULL;
> -
>         if (class->class_release)
>                 class->class_release(class);
>         else
> @@ -206,7 +204,6 @@ int class_register(struct class *cls)
>         cp->subsys.kobj.kset = class_kset;
>         cp->subsys.kobj.ktype = &class_ktype;
>         cp->class = cls;
> -       cls->p = cp;
>
>         error = kset_register(&cp->subsys);
>         if (error)
> @@ -222,7 +219,6 @@ int class_register(struct class *cls)
>
>  err_out:
>         kfree(cp);
> -       cls->p = NULL;
>         return error;
>  }
>  EXPORT_SYMBOL_GPL(class_register);
> diff --git a/include/linux/device/class.h b/include/linux/device/class.h
> index 9cb5db0588c8..f7aad64e256a 100644
> --- a/include/linux/device/class.h
> +++ b/include/linux/device/class.h
> @@ -71,8 +71,6 @@ struct class {
>         void (*get_ownership)(const struct device *dev, kuid_t *uid, kgid_t *gid);
>
>         const struct dev_pm_ops *pm;
> -
> -       struct subsys_private *p;
>  };
>
>  struct class_dev_iter {
> --
> 2.40.0
>