[PATCH 2/2] include: Fix compile warning in include/linux/bitops.h

[Namjae Jeon]

The compile warning is caused by __const_hweight8 when using hweight_long with -Wsign-compare option.
The reason is that the default return value of this macro is signed. So need type casting to remove warning.

Signed-off-by: Namjae Jeon <linkinjeon@xxxxxxxxx>
---
 include/asm-generic/bitops/const_hweight.h |   18 +++++++++---------
 1 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/include/asm-generic/bitops/const_hweight.h b/include/asm-generic/bitops/const_hweight.h
index fa2a50b..31b7fce 100644
--- a/include/asm-generic/bitops/const_hweight.h
+++ b/include/asm-generic/bitops/const_hweight.h
@@ -4,15 +4,15 @@
 /*
  * Compile time versions of __arch_hweightN()
  */
-#define __const_hweight8(w)		\
-      (	(!!((w) & (1ULL << 0))) +	\
-	(!!((w) & (1ULL << 1))) +	\
-	(!!((w) & (1ULL << 2))) +	\
-	(!!((w) & (1ULL << 3))) +	\
-	(!!((w) & (1ULL << 4))) +	\
-	(!!((w) & (1ULL << 5))) +	\
-	(!!((w) & (1ULL << 6))) +	\
-	(!!((w) & (1ULL << 7)))	)
+#define __const_hweight8(w)	(unsigned long)	\
+      	(	(!!((w) & (1ULL << 0))) +	\
+		(!!((w) & (1ULL << 1))) +	\
+		(!!((w) & (1ULL << 2))) +	\
+		(!!((w) & (1ULL << 3))) +	\
+		(!!((w) & (1ULL << 4))) +	\
+		(!!((w) & (1ULL << 5))) +	\
+		(!!((w) & (1ULL << 6))) +	\
+		(!!((w) & (1ULL << 7)))	)
 
 #define __const_hweight16(w) (__const_hweight8(w)  + __const_hweight8((w)  >> 8 ))
 #define __const_hweight32(w) (__const_hweight16(w) + __const_hweight16((w) >> 16))
-- 
1.7.4.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/