linux-kernel - [PATCH RT] Revert "rt: Improve the serial console PASS

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Date:   Thu, 23 Apr 2020 18:20:04 +0200
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     Jiri Kosina <jikos@...nel.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-rt-users <linux-rt-users@...r.kernel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Frederic Weisbecker <fweisbec@...il.com>,
        Matt Fleming <matt@...eblueprint.co.uk>,
        Daniel Wagner <dwagner@...e.de>
Subject: [PATCH RT] Revert "rt: Improve the serial console PASS_LIMIT"

There is no need to loop for longer. The message of too much work was
removed in commit
    9d7c249a1ef9b ("serial: 8250: drop the printk from serial8250_interrupt()")

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
---
 drivers/tty/serial/8250/8250_core.c | 11 +----------
 1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c
index 15d7c47fb7ca3..475b51f4321db 100644
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -55,16 +55,7 @@ static struct uart_driver serial8250_reg;
 
 static unsigned int skip_txen_test; /* force skip of txen test at init time */
 
-/*
- * On -rt we can have a more delays, and legitimately
- * so - so don't drop work spuriously and spam the
- * syslog:
- */
-#ifdef CONFIG_PREEMPT_RT
-# define PASS_LIMIT	1000000
-#else
-# define PASS_LIMIT	512
-#endif
+#define PASS_LIMIT	512
 
 #include <asm/serial.h>
 /*
-- 
2.26.2