linux-kernel - [PATCH 4/7] [v2] zram/xvmalloc: create CONFIG_ZRAM

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Date:	Fri, 28 Jan 2011 08:59:26 -0600
From:	Robert Jennings <rcj@...ux.vnet.ibm.com>
To:	Nitin Gupta <ngupta@...are.org>
Cc:	Greg Kroah-Hartman <gregkh@...e.de>,
	Robert Jennings <rcj@...ux.vnet.ibm.com>,
	Pekka Enberg <penberg@...helsinki.fi>,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: [PATCH 4/7] [v2] zram/xvmalloc: create CONFIG_ZRAM_DEBUG for debug
 code

Add a debug config flag to enable debug printk output and future
debug code.

Signed-off-by: Robert Jennings <rcj@...ux.vnet.ibm.com>
---
 drivers/staging/zram/Kconfig    |    8 ++++++++
 drivers/staging/zram/xvmalloc.c |    4 ++++
 drivers/staging/zram/zram_drv.c |    4 ++++
 3 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/drivers/staging/zram/Kconfig b/drivers/staging/zram/Kconfig
index da079f8..d957747 100644
--- a/drivers/staging/zram/Kconfig
+++ b/drivers/staging/zram/Kconfig
@@ -15,3 +15,11 @@ config ZRAM
 
 	  See zram.txt for more information.
 	  Project home: http://compcache.googlecode.com/
+
+config ZRAM_DEBUG
+	bool "Compressed RAM block device debug support"
+	depends on ZRAM
+	default n
+	help
+	  This option adds additional debugging code to the compressed
+	  RAM block device driver.
diff --git a/drivers/staging/zram/xvmalloc.c b/drivers/staging/zram/xvmalloc.c
index 149138a..0560e9d 100644
--- a/drivers/staging/zram/xvmalloc.c
+++ b/drivers/staging/zram/xvmalloc.c
@@ -10,6 +10,10 @@
  * Released under the terms of GNU General Public License Version 2.0
  */
 
+#ifdef CONFIG_ZRAM_DEBUG
+#define DEBUG
+#endif
+
 #include <linux/bitops.h>
 #include <linux/errno.h>
 #include <linux/highmem.h>
diff --git a/drivers/staging/zram/zram_drv.c b/drivers/staging/zram/zram_drv.c
index d85d034..c67060c 100644
--- a/drivers/staging/zram/zram_drv.c
+++ b/drivers/staging/zram/zram_drv.c
@@ -15,6 +15,10 @@
 #define KMSG_COMPONENT "zram"
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 
+#ifdef CONFIG_ZRAM_DEBUG
+#define DEBUG
+#endif
+
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/bio.h>
-- 
1.7.0.4

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