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>
diff --git a/drivers/staging/zram/Kconfig b/drivers/staging/zram/Kconfig
index d3982e6f..2f3b484 100644
--- a/drivers/staging/zram/Kconfig
+++ b/drivers/staging/zram/Kconfig
@@ -15,3 +15,11 @@
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 9cbe04a..4f6cb8d 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 3c8ecab..7d11c59 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>
