linux-kernel - Re: [PATCH v2 15/20] media: imx290: mark read reg function as __always

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Message-ID: <20211202145906.GA263467@thinkpad>
Date:   Thu, 2 Dec 2021 20:29:06 +0530
From:   Manivannan Sadhasivam <mani@...nel.org>
To:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Cc:     linuxarm@...wei.com, mauro.chehab@...wei.com,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        llvm@...ts.linux.dev
Subject: Re: [PATCH v2 15/20] media: imx290: mark read reg function as
 __always_unused

Hi Mauro,

On Mon, Nov 29, 2021 at 10:47:47AM +0100, Mauro Carvalho Chehab wrote:
> Such function is currently unused, but could be needed in the
> future. So, keep it, marking it as __always_unused, in order to
> avoid a clang W=1 error.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
> ---
> 
> See [PATCH v2 00/20] at: https://lore.kernel.org/all/cover.1638179135.git.mchehab+huawei@kernel.org/
> 
>  drivers/media/i2c/imx290.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/media/i2c/imx290.c b/drivers/media/i2c/imx290.c
> index bf7a6c37ca5d..99f2a50d39a4 100644
> --- a/drivers/media/i2c/imx290.c
> +++ b/drivers/media/i2c/imx290.c
> @@ -363,7 +363,7 @@ static inline struct imx290 *to_imx290(struct v4l2_subdev *_sd)
>  	return container_of(_sd, struct imx290, sd);
>  }
>  
> -static inline int imx290_read_reg(struct imx290 *imx290, u16 addr, u8 *value)
> +static inline int __always_unused imx290_read_reg(struct imx290 *imx290, u16 addr, u8 *value)

Can we drop this function instead?

Thanks,
Mani

>  {
>  	unsigned int regval;
>  	int ret;
> -- 
> 2.33.1
>