linux-kernel - [PATCH] drivers/tty/hvc: don't free hvc_console

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Message-ID: <20140502221847.24255.17096.stgit@hds.com>
Date:	Fri, 02 May 2014 18:18:47 -0400
From:	Tomoki Sekiyama <tomoki.sekiyama@....com>
To:	linux-kernel@...r.kernel.org
Cc:	gregkh@...uxfoundation.org, jslaby@...e.cz,
	mitsuhiro.tanino@....com, paul.gortmaker@...driver.com
Subject: [PATCH] drivers/tty/hvc: don't free hvc_console_setup after init

When 'console=hvc0' is specified to the kernel parameter in x86 KVM guest,
hvc console is setup within a kthread. However, that will cause SEGV
and the boot will fail when the driver is builtin to the kernel,
because currently hvc_console_setup() is annotated with '__init'. This
patch removes '__init' to boot the guest successfully with 'console=hvc0'.

Signed-off-by: Tomoki Sekiyama <tomoki.sekiyama@....com>
---
 drivers/tty/hvc/hvc_console.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c
index 94f9e3a..0ff7fda 100644
--- a/drivers/tty/hvc/hvc_console.c
+++ b/drivers/tty/hvc/hvc_console.c
@@ -190,7 +190,7 @@ static struct tty_driver *hvc_console_device(struct console *c, int *index)
 	return hvc_driver;
 }
 
-static int __init hvc_console_setup(struct console *co, char *options)
+static int hvc_console_setup(struct console *co, char *options)
 {	
 	if (co->index < 0 || co->index >= MAX_NR_HVC_CONSOLES)
 		return -ENODEV;

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