linux-kernel - [PATCH 2/4] tty/serial: make port of serial8250_register_8250

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Message-Id: <20210519072153.3859-2-jslaby@suse.cz>
Date:   Wed, 19 May 2021 09:21:51 +0200
From:   Jiri Slaby <jslaby@...e.cz>
To:     gregkh@...uxfoundation.org
Cc:     linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 2/4] tty/serial: make port of serial8250_register_8250_port const

After the previous patch, we can make port passed to
serial8250_find_match_or_unused const. And then we can make const also
port of serial8250_register_8250_port.

Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/tty/serial/8250/8250_core.c | 4 ++--
 include/linux/serial_8250.h         | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c
index 1082e76c4d37..1ce193daea7f 100644
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -906,7 +906,7 @@ static struct platform_device *serial8250_isa_devs;
  */
 static DEFINE_MUTEX(serial_mutex);
 
-static struct uart_8250_port *serial8250_find_match_or_unused(struct uart_port *port)
+static struct uart_8250_port *serial8250_find_match_or_unused(const struct uart_port *port)
 {
 	int i;
 
@@ -971,7 +971,7 @@ static void serial_8250_overrun_backoff_work(struct work_struct *work)
  *
  *	On success the port is ready to use and the line number is returned.
  */
-int serial8250_register_8250_port(struct uart_8250_port *up)
+int serial8250_register_8250_port(const struct uart_8250_port *up)
 {
 	struct uart_8250_port *uart;
 	int ret = -ENOSPC;
diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h
index 9e655055112d..5db211f43b29 100644
--- a/include/linux/serial_8250.h
+++ b/include/linux/serial_8250.h
@@ -146,7 +146,7 @@ static inline struct uart_8250_port *up_to_u8250p(struct uart_port *up)
 	return container_of(up, struct uart_8250_port, port);
 }
 
-int serial8250_register_8250_port(struct uart_8250_port *);
+int serial8250_register_8250_port(const struct uart_8250_port *);
 void serial8250_unregister_port(int line);
 void serial8250_suspend_port(int line);
 void serial8250_resume_port(int line);
-- 
2.31.1