linux-kernel - [PATCH 15/58] tty/serial: Migrate dz to use has

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Message-Id: <20191213000657.931618-16-dima@arista.com>
Date:   Fri, 13 Dec 2019 00:06:14 +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,
        "Maciej W. Rozycki" <macro@...ux-mips.org>
Subject: [PATCH 15/58] tty/serial: Migrate dz 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.

Cc: "Maciej W. Rozycki" <macro@...ux-mips.org>
Signed-off-by: Dmitry Safonov <dima@...sta.com>
---
 drivers/tty/serial/dz.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/tty/serial/dz.c b/drivers/tty/serial/dz.c
index 7b57e840e255..6192ed011bc3 100644
--- a/drivers/tty/serial/dz.c
+++ b/drivers/tty/serial/dz.c
@@ -29,10 +29,6 @@
 
 #undef DEBUG_DZ
 
-#if defined(CONFIG_SERIAL_DZ_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
 #include <linux/bitops.h>
 #include <linux/compiler.h>
 #include <linux/console.h>
@@ -787,6 +783,7 @@ static void __init dz_init_ports(void)
 		uport->ops	= &dz_ops;
 		uport->line	= line;
 		uport->mapbase	= base;
+		uport->has_sysrq = IS_ENABLED(CONFIG_SERIAL_DZ_CONSOLE);
 	}
 }
 
-- 
2.24.0