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SubjectRe: [PATCH 1/5] tty: serial: define UART_LCR_WLEN() macro
On Thu, Feb 24, 2022 at 10:55:54AM +0100, Jiri Slaby wrote:
> Define a generic UART_LCR_WLEN() macro with a size argument. It can be
> used to encode byte size into an LCR value. Therefore we can use it to
> simplify the drivers using tty_get_char_size() in the next patches.
>
> Signed-off-by: Jiri Slaby <jslaby@suse.cz>
> ---
> include/uapi/linux/serial_reg.h | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/include/uapi/linux/serial_reg.h b/include/uapi/linux/serial_reg.h
> index f51bc8f36813..c9d5ff6dd4c6 100644
> --- a/include/uapi/linux/serial_reg.h
> +++ b/include/uapi/linux/serial_reg.h
> @@ -111,6 +111,7 @@
> #define UART_LCR_WLEN6 0x01 /* Wordlength: 6 bits */
> #define UART_LCR_WLEN7 0x02 /* Wordlength: 7 bits */
> #define UART_LCR_WLEN8 0x03 /* Wordlength: 8 bits */
> +#define UART_LCR_WLEN(x) ((x) - 5)

I'm all for this, but why does it need to be in a uapi .h file?

thanks,

greg k-h

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