staging: ramster/debug: Add CONFIG_RAMSTER_DEBUG Kconfig entry

Add CONFIG_RAMSTER_DEBUG Kconfig entry.
Acked-by: Dan Magenheimer <dan.magenheimer@oracle.com>
Signed-off-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/zcache/Kconfig

@@ -33,6 +33,14 @@ config RAMSTER
 	  zcache2, compresses swap pages into local RAM, but then remotifies
 	  the compressed pages to another node in the RAMster cluster.
 
+config RAMSTER_DEBUG
+        bool "Enable ramster debug statistics"
+        depends on DEBUG_FS && RAMSTER
+        default n
+        help
+          This is used to provide an debugfs directory with counters of
+          how ramster is doing. You probably want to set this to 'N'.
+
 # Depends on not-yet-upstreamed mm patches to export end_swap_bio_write and
 # __add_to_swap_cache, and implement __swap_writepage (which is swap_writepage
 # without the frontswap call. When these are in-tree, the dependency on

drivers/staging/zcache/Makefile

 zcache-y	:=		zcache-main.o tmem.o zbud.o
 zcache-$(CONFIG_ZCACHE_DEBUG) += debug.o
-zcache-$(CONFIG_RAMSTER) += ramster/debug.o
+zcache-$(CONFIG_RAMSTER_DEBUG) += ramster/debug.o
 zcache-$(CONFIG_RAMSTER)	+=	ramster/ramster.o ramster/r2net.o
 zcache-$(CONFIG_RAMSTER)	+=	ramster/nodemanager.o ramster/tcp.o
 zcache-$(CONFIG_RAMSTER)	+=	ramster/heartbeat.o ramster/masklog.o

drivers/staging/zcache/ramster/debug.h

 #include <linux/bug.h>
 
-#ifdef CONFIG_RAMSTER
+#ifdef CONFIG_RAMSTER_DEBUG
 
 extern long ramster_flnodes;
 static atomic_t ramster_flnodes_atomic = ATOMIC_INIT(0);