X-Git-Url: http://git.liburcu.org/?p=urcu.git;a=blobdiff_plain;f=urcu%2Fcompiler.h;h=4bced2a9849846a25b8c1fd59a15cd2b03af0060;hp=489677b3aefe1ad6dd294006d903721f375f66a7;hb=27b940e7a3f4ebd44ac60636905374e59751e835;hpb=78bec10ca517bf457cba0cddfdb3516ee153e36f

diff --git a/urcu/compiler.h b/urcu/compiler.h
index 489677b..4bced2a 100644
--- a/urcu/compiler.h
+++ b/urcu/compiler.h
@@ -55,13 +55,28 @@
 #define CAA_BITS_PER_LONG	32
 #endif
 
-#define caa_container_of(ptr, type, member)					\
+/*
+ * caa_container_of - Get the address of an object containing a field.
+ *
+ * @ptr: pointer to the field.
+ * @type: type of the object.
+ * @member: name of the field within the object.
+ */
+#define caa_container_of(ptr, type, member)				\
 	({								\
-		const typeof(((type *)NULL)->member) * __ptr = (ptr);	\
+		const typeof(((type *) NULL)->member) * __ptr = (ptr);	\
 		(type *)((char *)__ptr - offsetof(type, member));	\
 	})
 
 #define CAA_BUILD_BUG_ON_ZERO(cond) (sizeof(struct { int:-!!(cond); }))
 #define CAA_BUILD_BUG_ON(cond) ((void)BUILD_BUG_ON_ZERO(cond))
 
+/*
+ * __rcu is an annotation that documents RCU pointer accesses that need
+ * to be protected by a read-side critical section. Eventually, a static
+ * checker will be able to use this annotation to detect incorrect RCU
+ * usage.
+ */
+#define __rcu
+
 #endif /* _URCU_COMPILER_H */