linux-kernel - [PATCH ] printk: add module parameter console_suspend_enabled to control console_suspend

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Message-ID: <1312859345.1743.9.camel@ymzhang>
Date:	Tue, 09 Aug 2011 11:09:04 +0800
From:	Yanmin Zhang <yanmin_zhang@...ux.intel.com>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH ] printk: add module parameter console_suspend_enabled to
 control console_suspend_enabled

We are enabling some power features on medfield. To test suspend-2-RAM
conveniently, we need turn on/off console_suspend_enabled frequently.

Below patch adds a module parameter, so users could change it by:
/sys/module/printk/parameters/console_suspend_enabled

Signed-off-by: Yanmin Zhang <yanmin.zhang@...el.com>

---
 kernel/printk.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/kernel/printk.c b/kernel/printk.c
index 37dff34..ce00f1b 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -1106,6 +1106,8 @@ static int __init console_suspend_disable(char *str)
 	return 1;
 }
 __setup("no_console_suspend", console_suspend_disable);
+module_param_named(console_suspend_enabled, console_suspend_enabled,
+		bool, S_IRUGO | S_IWUSR);
 
 /**
  * suspend_console - suspend the console subsystem
-- 
1.7.1




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