linux-kernel - [PATCH 10/10] fblog: add "activate" module parameter

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Message-Id: <1339884266-9201-11-git-send-email-dh.herrmann@googlemail.com>
Date:	Sun, 17 Jun 2012 00:04:26 +0200
From:	David Herrmann <dh.herrmann@...glemail.com>
To:	linux-serial@...r.kernel.org
Cc:	Florian Tobias Schandinat <FlorianSchandinat@....de>,
	linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	David Herrmann <dh.herrmann@...glemail.com>
Subject: [PATCH 10/10] fblog: add "activate" module parameter

This new parameter controls whether fblog is automatically activated when
it is loaded. This defaults to "true".

We can now compile with CONFIG_VT=n and CONFIG_FBLOG=y and control fblog
with fblog.activate=0/1 on the kernel command line to enable/disable
debugging.

Signed-off-by: David Herrmann <dh.herrmann@...glemail.com>
---
 drivers/video/console/fblog.c |   10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/video/console/fblog.c b/drivers/video/console/fblog.c
index 9d3b072..cabc550 100644
--- a/drivers/video/console/fblog.c
+++ b/drivers/video/console/fblog.c
@@ -94,6 +94,7 @@ struct fblog_fb {
 static struct fblog_fb *fblog_fbs[FB_MAX];
 static struct device *fblog_device;
 static atomic_t fblog_active;
+static bool activate = 1;
 
 static void fblog_buf_resize(struct fblog_buf *buf, size_t width,
 			     size_t height)
@@ -653,6 +654,12 @@ static int __init fblog_init(void)
 
 	register_console(&fblog_con_driver);
 
+	if (activate) {
+		console_lock();
+		fblog_activate();
+		console_unlock();
+	}
+
 	return 0;
 
 err_fb:
@@ -677,6 +684,9 @@ static void __exit fblog_exit(void)
 	put_device(fblog_device);
 }
 
+module_param(activate, bool, S_IRUGO);
+MODULE_PARM_DESC(activate, "Activate fblog by default");
+
 module_init(fblog_init);
 module_exit(fblog_exit);
 MODULE_LICENSE("GPL");
-- 
1.7.10.4

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