linux-kernel - [RFC PATCH 2/5] serial: omap: Remove _

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Date:   Tue, 18 Jul 2017 12:30:00 +0800
From:   Jeffy Chen <jeffy.chen@...k-chips.com>
To:     linux-kernel@...r.kernel.org
Cc:     gregkh@...uxfoundation.org, briannorris@...omium.org,
        dianders@...omium.org, peter@...leysoftware.com,
        Jeffy Chen <jeffy.chen@...k-chips.com>,
        linux-serial@...r.kernel.org, Jiri Slaby <jslaby@...e.com>
Subject: [RFC PATCH 2/5] serial: omap: Remove __init marking from early write

The earlycon would be alive outside the init code in these cases:
1/ we have keep_bootcon in cmdline.
2/ we don't have a real console to switch to.

So remove the __init marking to avoid invalid memory access.

Signed-off-by: Jeffy Chen <jeffy.chen@...k-chips.com>
---

 drivers/tty/serial/omap-serial.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index 1ea05ac..7754053 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -1235,21 +1235,20 @@ static int serial_omap_poll_get_char(struct uart_port *port)
 #ifdef CONFIG_SERIAL_OMAP_CONSOLE
 
 #ifdef CONFIG_SERIAL_EARLYCON
-static unsigned int __init omap_serial_early_in(struct uart_port *port,
-						int offset)
+static unsigned int omap_serial_early_in(struct uart_port *port, int offset)
 {
 	offset <<= port->regshift;
 	return readw(port->membase + offset);
 }
 
-static void __init omap_serial_early_out(struct uart_port *port, int offset,
-					 int value)
+static void omap_serial_early_out(struct uart_port *port, int offset,
+				  int value)
 {
 	offset <<= port->regshift;
 	writew(value, port->membase + offset);
 }
 
-static void __init omap_serial_early_putc(struct uart_port *port, int c)
+static void omap_serial_early_putc(struct uart_port *port, int c)
 {
 	unsigned int status;
 
@@ -1262,8 +1261,8 @@ static void __init omap_serial_early_putc(struct uart_port *port, int c)
 	omap_serial_early_out(port, UART_TX, c);
 }
 
-static void __init early_omap_serial_write(struct console *console,
-					   const char *s, unsigned int count)
+static void early_omap_serial_write(struct console *console, const char *s,
+				    unsigned int count)
 {
 	struct earlycon_device *device = console->data;
 	struct uart_port *port = &device->port;
-- 
2.1.4