linux-kernel - Re: [PATCH v2] staging: most: use inline functions for iface_to

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Message-ID: <alpine.DEB.2.22.394.2303202217110.2906@hadrien>
Date:   Mon, 20 Mar 2023 22:17:45 +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,
        parthiban.veerasooran@...rochip.com, christian.gromm@...rochip.com,
        drv@...lo.com, dave@...olabs.net, yang.lee@...ux.alibaba.com,
        linux-kernel@...r.kernel.org, linux-staging@...ts.linux.dev,
        Julia Lawall <julia.lawall@...ia.fr>
Subject: Re: [PATCH v2] staging: most: use inline functions for
 iface_to_hdm

Maybe "define iface_to_hdm as an inline function" would be better.  "use"
is not very precise.

julia

On Mon, 20 Mar 2023, Menna Mahmoud wrote:

> Convert `iface_to_hdm` macro into a static inline function.
> 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.
>
> Suggested-by: Julia Lawall <julia.lawall@...ia.fr>
> Signed-off-by: Menna Mahmoud <eng.mennamahmoud.mm@...il.com>
> ---
> change in v2:
> 	edit subject line.
> ---
>  drivers/staging/most/dim2/dim2.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/staging/most/dim2/dim2.c b/drivers/staging/most/dim2/dim2.c
> index b8bd01ca1f11..21d1c9f24c3d 100644
> --- a/drivers/staging/most/dim2/dim2.c
> +++ b/drivers/staging/most/dim2/dim2.c
> @@ -108,7 +108,10 @@ struct dim2_platform_data {
>  	u8 fcnt;
>  };
>
> -#define iface_to_hdm(iface) container_of(iface, struct dim2_hdm, most_iface)
> +static inline struct dim2_hdm *iface_to_hdm(struct most_interface *iface)
> +{
> +	return container_of(iface, struct dim2_hdm, most_iface);
> +}
>
>  /* Macro to identify a network status message */
>  #define PACKET_IS_NET_INFO(p)  \
> --
> 2.34.1
>
>