linux-kernel - [PATCH 1/2] random: make it possible to enable debugging without rebuild

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Date:	Mon, 8 Oct 2012 16:39:30 +0200 (CEST)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Theodore Ts'o <tytso@....edu>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] random: make it possible to enable debugging without
 rebuild

The module parameter that turns debugging mode (which basically means 
printing a few extra lines during runtime) is in '#if 0' block. Forcing 
everyone who would like to see how entropy is behaving on his system seems 
to be a little bit too harsh.
If we were concerned about speed, we could potentially turn 'debug' into
a static key, but I don't think it's necessary.

Drop the '#if 0' block to allow using the 'debug' parameter without rebuilding.

Signed-off-by: Jiri Kosina <jkosina@...e.cz>
---
 drivers/char/random.c |    4 ----
 1 files changed, 0 insertions(+), 4 deletions(-)

diff --git a/drivers/char/random.c b/drivers/char/random.c
index b86eae9..9ac4443 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -399,7 +399,6 @@ static DECLARE_WAIT_QUEUE_HEAD(random_read_wait);
 static DECLARE_WAIT_QUEUE_HEAD(random_write_wait);
 static struct fasync_struct *fasync;
 
-#if 0
 static bool debug;
 module_param(debug, bool, 0644);
 #define DEBUG_ENT(fmt, arg...) do { \
@@ -410,9 +409,6 @@ module_param(debug, bool, 0644);
 		blocking_pool.entropy_count,\
 		nonblocking_pool.entropy_count,\
 		## arg); } while (0)
-#else
-#define DEBUG_ENT(fmt, arg...) do {} while (0)
-#endif
 
 /**********************************************************************
  *

-- 
Jiri Kosina
SUSE Labs
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