[PATCH] zcache/debug: compiler failure on PPC64 and revert commit.

[Konrad Rzeszutek Wilk]

On PPC64 we get this:
In file included from drivers/staging/zcache/debug.c:2:
drivers/staging/zcache/debug.h: In function 'dec_zcache_obj_count':
drivers/staging/zcache/debug.h:16: error: implicit declaration of function 'BUG_ON'

This simple patch adds the appropiate header file to finish
the compile and reverts
"staging: zcache: disable ZCACHE_DEBUG due to build error"
(5db5a20a50cfd078c78b13a988f237cca81aedc5)

Reported-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
---
 drivers/staging/zcache/Kconfig | 1 -
 drivers/staging/zcache/debug.h | 2 ++
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/zcache/Kconfig b/drivers/staging/zcache/Kconfig
index ad47b4b..2da6cc4 100644
--- a/drivers/staging/zcache/Kconfig
+++ b/drivers/staging/zcache/Kconfig
@@ -13,7 +13,6 @@ config ZCACHE
 config ZCACHE_DEBUG
 	bool "Enable debug statistics"
 	depends on DEBUG_FS && ZCACHE
-	depends on BROKEN
 	default n
 	help
 	  This is used to provide an debugfs directory with counters of
diff --git a/drivers/staging/zcache/debug.h b/drivers/staging/zcache/debug.h
index eef67db..4bbe49b 100644
--- a/drivers/staging/zcache/debug.h
+++ b/drivers/staging/zcache/debug.h
@@ -1,3 +1,5 @@
+#include <linux/bug.h>
+
 #ifdef CONFIG_ZCACHE_DEBUG
 
 /* we try to keep these statistics SMP-consistent */
-- 
1.8.0.2

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