linux-kernel - [PATCH 10/58] tty/serial: Migrate apbuart to use has

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Date:   Fri, 13 Dec 2019 00:06:09 +0000
From:   Dmitry Safonov <dima@...sta.com>
To:     linux-kernel@...r.kernel.org
Cc:     Dmitry Safonov <0x7f454c46@...il.com>,
        Dmitry Safonov <dima@...sta.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.com>,
        Vasiliy Khoruzhick <vasilykh@...sta.com>,
        linux-serial@...r.kernel.org
Subject: [PATCH 10/58] tty/serial: Migrate apbuart to use has_sysrq

The SUPPORT_SYSRQ ifdeffery is not nice as:
- May create misunderstanding about sizeof(struct uart_port) between
  different objects
- Prevents moving functions from serial_core.h
- Reduces readability (well, it's ifdeffery - it's hard to follow)

In order to remove SUPPORT_SYSRQ, has_sysrq variable has been added.
Initialise it in driver's probe and remove ifdeffery.

Signed-off-by: Dmitry Safonov <dima@...sta.com>
---
 drivers/tty/serial/apbuart.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/tty/serial/apbuart.c b/drivers/tty/serial/apbuart.c
index 60cd133ffbbc..e8d56e899ec7 100644
--- a/drivers/tty/serial/apbuart.c
+++ b/drivers/tty/serial/apbuart.c
@@ -11,10 +11,6 @@
  *  Copyright (C) 2009 Kristoffer Glembo <kristoffer@...sler.com>, Aeroflex Gaisler AB
  */
 
-#if defined(CONFIG_SERIAL_GRLIB_GAISLER_APBUART_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
 #include <linux/module.h>
 #include <linux/tty.h>
 #include <linux/tty_flip.h>
@@ -626,6 +622,7 @@ static int __init grlib_apbuart_configure(void)
 		port->irq = 0;
 		port->iotype = UPIO_MEM;
 		port->ops = &grlib_apbuart_ops;
+		port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_GRLIB_GAISLER_APBUART_CONSOLE);
 		port->flags = UPF_BOOT_AUTOCONF;
 		port->line = line;
 		port->uartclk = *freq_hz;
-- 
2.24.0