20 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)  argument
22  * container_of - cast a member of a structure out to the containing structure
23  * @ptr:    the pointer to the member.
25  * @member: the name of the member within the struct.
28 #define container_of(ptr, type, member) ({          \  argument
29 	const typeof(((type *)0)->member)*__mptr = (ptr);    \
30 		     (type *)((char *)__mptr - offsetof(type, member)); })
90  * @member:	the name of the list_head within the struct.
92 #define list_entry(ptr, type, member) \  argument
93 	container_of(ptr, type, member)
99  * @member:	the name of the list_head within the struct.
101 #define list_for_each_entry(pos, head, member)				\  argument
102 	for (pos = list_entry((head)->next, typeof(*pos), member);	\
103 	     &pos->member != (head); 	\
104 	     pos = list_entry(pos->member.next, typeof(*pos), member))