linux-kernel - [PATCH 1/6] serial8250: Mark console as CON

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Date:	Thu,  2 Dec 2010 13:08:18 -0800
From:	Greg Kroah-Hartman <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: [PATCH 1/6] serial8250: Mark console as CON_ANYTIME

From: Peter Zijlstra <peterz@...radead.org>

While trying to debug a cpu-hotplug issue I noticed printk() stopped
working once the cpu got marked offline, since the 8250 serial console
doesn't have any per-cpu resources the CON_ANYTIME bit is the safe and
documented way to make it work again.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
 drivers/serial/8250.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index 4d8e14b..09a5508 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -2872,7 +2872,7 @@ static struct console serial8250_console = {
 	.device		= uart_console_device,
 	.setup		= serial8250_console_setup,
 	.early_setup	= serial8250_console_early_setup,
-	.flags		= CON_PRINTBUFFER,
+	.flags		= CON_PRINTBUFFER | CON_ANYTIME,
 	.index		= -1,
 	.data		= &serial8250_reg,
 };
-- 
1.7.1

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