From b1f5b81ebeee3974a8c793cafacace991d9a864d Mon Sep 17 00:00:00 2001
From: Robert Jennings <rcj@linux.vnet.ibm.com>
Date: Fri, 28 Jan 2011 08:59:26 -0600
Subject: [PATCH] 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@linux.vnet.ibm.com>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
 drivers/staging/zram/Kconfig    | 8 ++++++++
 drivers/staging/zram/xvmalloc.c | 4 ++++
 drivers/staging/zram/zram_drv.c | 4 ++++
 3 files changed, 16 insertions(+)

diff --git a/drivers/staging/zram/Kconfig b/drivers/staging/zram/Kconfig
index d3982e6fdb40..2f3b484ce5a4 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 9cbe04a496e1..4f6cb8de6865 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 3c8ecab70e97..7d11c595c7d2 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>
-- 
2.25.1