linux-kernel - Re: [PATCH] staging: rtl8723bs: include: use inline functions for dvobj_to

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Date:   Sun, 19 Mar 2023 15:13:04 +0100 (CET)
From:   Julia Lawall <julia.lawall@...ia.fr>
To:     Menna Mahmoud <eng.mennamahmoud.mm@...il.com>
cc:     gregkh@...uxfoundation.org, outreachy@...ts.linux.dev,
        namcaov@...il.com, straube.linux@...il.com, hdegoede@...hat.com,
        linux-kernel@...r.kernel.org, linux-staging@...ts.linux.dev
Subject: Re: [PATCH] staging: rtl8723bs: include: use inline functions for
 dvobj_to_dev

How have you chosen the names at the beginning of the subject line?  The
other patches on this file don't have the word "include:" in the subject.
Please see the section "Following the Driver commit style" of the tutorial
to see what to do.


On Sun, 19 Mar 2023, Menna Mahmoud wrote:

> Convert `dvobj_to_dev` macro into static inline function,

"into a static inline function"

But the message is a bit too verbose.  Please see my suggestion on another
similar patch that was recently proposed.

julia

> because it is not great to have macro that use `container_of` macro,
> because from looking at the definition one cannot tell what type it applies to.
>
> One can get the same benefit from an efficiency point of view by making an
> inline function (concretely, typically a static inline function, because
> the definition only needs to be visible in the current file, or in the
> case of a header file in the file that includes the header file).
>
> Suggested-by: Julia Lawall <julia.lawall@...ia.fr>
> Signed-off-by: Menna Mahmoud <eng.mennamahmoud.mm@...il.com>
> ---
>  drivers/staging/rtl8723bs/include/drv_types.h | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/staging/rtl8723bs/include/drv_types.h b/drivers/staging/rtl8723bs/include/drv_types.h
> index 82159e1c7f9b..ea6bb44c5e1d 100644
> --- a/drivers/staging/rtl8723bs/include/drv_types.h
> +++ b/drivers/staging/rtl8723bs/include/drv_types.h
> @@ -305,7 +305,11 @@ struct sdio_data intf_data;
>  };
>
>  #define dvobj_to_pwrctl(dvobj) (&(dvobj->pwrctl_priv))
> -#define pwrctl_to_dvobj(pwrctl) container_of(pwrctl, struct dvobj_priv, pwrctl_priv)
> +
> +static inline struct dvobj_priv *pwrctl_to_dvobj(struct pwrctrl_priv *pwrctl_priv)
> +{
> +	return container_of(pwrctl_priv, struct dvobj_priv, pwrctl_priv);
> +}
>
>  static inline struct device *dvobj_to_dev(struct dvobj_priv *dvobj)
>  {
> --
> 2.34.1
>
>