linux-kernel - [PATCH ] printk: add module parameter ignore_loglevel to control ignore

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Message-ID: <1312859564.1743.13.camel@ymzhang>
Date:	Tue, 09 Aug 2011 11:12:44 +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 ignore_loglevel to control
 ignore_loglevel

We are enabling some power features on medfield. To test suspend-2-RAM
conveniently, we need turn on/off ignore_loglevel frequently without rebooting.

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

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

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

diff --git a/kernel/printk.c b/kernel/printk.c
index ce00f1b..12d4437 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -530,6 +530,7 @@ static int __init ignore_loglevel_setup(char *str)
 }
 
 early_param("ignore_loglevel", ignore_loglevel_setup);
+module_param_named(ignore_loglevel, ignore_loglevel, bool, S_IRUGO | S_IWUSR);
 
 /*
  * Write out chars from start to end - 1 inclusive
-- 
1.7.1



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