linux-kernel - Re: [PATCH] serial: Remove unused uart_get

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Message-ID: <1736ad95-566d-4c87-835e-257a091fac59@infradead.org>
Date: Sun, 8 Jun 2025 09:30:00 -0700
From: Randy Dunlap <rdunlap@...radead.org>
To: linux@...blig.org, gregkh@...uxfoundation.org, jirislaby@...nel.org,
 corbet@....net
Cc: linux-serial@...r.kernel.org, linux-doc@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] serial: Remove unused uart_get_console



On 6/8/25 8:46 AM, linux@...blig.org wrote:
> From: "Dr. David Alan Gilbert" <linux@...blig.org>
> 
> uart_get_console() has been unused since 2019's
> commit bd0d9d159988 ("serial: remove ks8695 driver")
> 
> Remove it, and it's associated docs.
> 
> Signed-off-by: Dr. David Alan Gilbert <linux@...blig.org>

Acked-by: Randy Dunlap <rdunlap@...radead.org>

Thanks.

> ---
>  Documentation/driver-api/serial/driver.rst |  7 +++---
>  drivers/tty/serial/serial_core.c           | 27 ----------------------
>  include/linux/serial_core.h                |  2 --
>  3 files changed, 3 insertions(+), 33 deletions(-)
> 
> diff --git a/Documentation/driver-api/serial/driver.rst b/Documentation/driver-api/serial/driver.rst
> index fa1ebfcd4472..c1db6a1a67c4 100644
> --- a/Documentation/driver-api/serial/driver.rst
> +++ b/Documentation/driver-api/serial/driver.rst
> @@ -24,9 +24,8 @@ console support.
>  Console Support
>  ---------------
>  
> -The serial core provides a few helper functions.  This includes identifying
> -the correct port structure (via uart_get_console()) and decoding command line
> -arguments (uart_parse_options()).
> +The serial core provides a few helper functions.  This includes
> +decoding command line arguments (uart_parse_options()).
>  
>  There is also a helper function (uart_console_write()) which performs a
>  character by character write, translating newlines to CRLF sequences.
> @@ -76,7 +75,7 @@ Other functions
>             uart_add_one_port uart_remove_one_port uart_console_write
>             uart_parse_earlycon uart_parse_options uart_set_options
>             uart_get_lsr_info uart_handle_dcd_change uart_handle_cts_change
> -           uart_try_toggle_sysrq uart_get_console
> +           uart_try_toggle_sysrq
>  
>  .. kernel-doc:: include/linux/serial_core.h
>     :identifiers: uart_port_tx_limited uart_port_tx
> diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
> index 1f7708a91fc6..c15e005047bb 100644
> --- a/drivers/tty/serial/serial_core.c
> +++ b/drivers/tty/serial/serial_core.c
> @@ -2131,33 +2131,6 @@ void uart_console_write(struct uart_port *port, const char *s,
>  }
>  EXPORT_SYMBOL_GPL(uart_console_write);
>  
> -/**
> - * uart_get_console - get uart port for console
> - * @ports: ports to search in
> - * @nr: number of @ports
> - * @co: console to search for
> - * Returns: uart_port for the console @co
> - *
> - * Check whether an invalid uart number has been specified (as @co->index), and
> - * if so, search for the first available port that does have console support.
> - */
> -struct uart_port * __init
> -uart_get_console(struct uart_port *ports, int nr, struct console *co)
> -{
> -	int idx = co->index;
> -
> -	if (idx < 0 || idx >= nr || (ports[idx].iobase == 0 &&
> -				     ports[idx].membase == NULL))
> -		for (idx = 0; idx < nr; idx++)
> -			if (ports[idx].iobase != 0 ||
> -			    ports[idx].membase != NULL)
> -				break;
> -
> -	co->index = idx;
> -
> -	return ports + idx;
> -}
> -
>  /**
>   * uart_parse_earlycon - Parse earlycon options
>   * @p:	     ptr to 2nd field (ie., just beyond '<name>,')
> diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
> index 914b5e97e056..cfd891357573 100644
> --- a/include/linux/serial_core.h
> +++ b/include/linux/serial_core.h
> @@ -1101,8 +1101,6 @@ static inline bool uart_console_registered(struct uart_port *port)
>  	return uart_console(port) && console_is_registered(port->cons);
>  }
>  
> -struct uart_port *uart_get_console(struct uart_port *ports, int nr,
> -				   struct console *c);
>  int uart_parse_earlycon(char *p, enum uart_iotype *iotype,
>  			resource_size_t *addr, char **options);
>  void uart_parse_options(const char *options, int *baud, int *parity, int *bits,

-- 
~Randy