X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=urcu%2Fcompiler.h;h=e7817dbd019f8803abea56cd54fd749ebe6279d6;hb=6488f70bcf96976bfda4d1836e0cab5ef6f599ff;hp=074e70026a056cab15d1b05b7537ac333c2daedf;hpb=b52a3dc23521f7a21fb5ab3d2b53dad89c586ee4;p=userspace-rcu.git

diff --git a/urcu/compiler.h b/urcu/compiler.h
index 074e700..e7817db 100644
--- a/urcu/compiler.h
+++ b/urcu/compiler.h
@@ -89,12 +89,11 @@
 #define caa_is_signed_type(type)	((type) -1 < (type) 0)
 
 /*
- * Sign-extend to long if needed, and output type is unsigned long.
+ * Cast to unsigned long, sign-extending if @v is signed.
+ * Note: casting to a larger type or to same type size keeps the sign of
+ * the expression being cast (see C99 6.3.1.3).
  */
-#define caa_cast_long_keep_sign(v)		\
-	(caa_is_signed_type(__typeof__(v)) ?	\
-		(unsigned long) (long) (v) :	\
-		(unsigned long) (v))
+#define caa_cast_long_keep_sign(v)	((unsigned long) (v))
 
 /*
  * Don't allow compiling with buggy compiler.