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References: <20240110102102.61587-1-tudor.ambarus@linaro.org> <20240110102102.61587-18-tudor.ambarus@linaro.org>
In-Reply-To: <20240110102102.61587-18-tudor.ambarus@linaro.org>
From: Sam Protsenko <semen.protsenko@linaro.org>
Date: Tue, 16 Jan 2024 13:03:34 -0600
Message-ID: <CAPLW+4k091328krLB_KdHyobG-pR--Rt5WaN6c1ccpgdV8ry7Q@mail.gmail.com>
Subject: Re: [PATCH 17/18] tty: serial: samsung: shrink port feature flags to u8
To: Tudor Ambarus <tudor.ambarus@linaro.org>
Cc: krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, 
	gregkh@linuxfoundation.org, jirislaby@kernel.org, 
	linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, 
	linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, 
	andre.draszik@linaro.org, peter.griffin@linaro.org, kernel-team@android.com, 
	willmcvicker@google.com
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On Wed, Jan 10, 2024 at 4:25=E2=80=AFAM Tudor Ambarus <tudor.ambarus@linaro=
org> wrote:
>
> There's a single flag defined as of now. Shrink the feature flags to u8
> and aim for a better memory footprint for ``struct s3c24xx_uart_info``.
>
> Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
> ---
>  drivers/tty/serial/samsung_tty.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsun=
g_tty.c
> index 5df2bcebf9fb..598d9fe7a492 100644
> --- a/drivers/tty/serial/samsung_tty.c
> +++ b/drivers/tty/serial/samsung_tty.c
> @@ -90,7 +90,7 @@ struct s3c24xx_uart_info {
>
>         /* uart port features */
>
> -       unsigned int            has_divslot:1;
> +       u8                      has_divslot:1;

But that's already a bit field. Why does it matter which type it is?

>  };
>
>  struct s3c24xx_serial_drv_data {
> --
> 2.43.0.472.g3155946c3a-goog
>
>