Clarify list_add documentation

Originally, the function list_add is said to insert a node at the
beginning of a given list. However, it could also be used to insert a
node after any existing node in the list. Therefore, this commit
modifies its documentation to reflect the actual list manipulation
performed by the function. The checksum of list.h is also updated.

Change-Id: I661d7a0ebb876712c8ff75deef84370a51e62f1c

Author: SimonLiu423

list.h

@@ -90,13 +90,13 @@ static inline void INIT_LIST_HEAD(struct list_head *head)
 }
 
 /**
- * list_add - Insert a node at the beginning of a circular list
+ * list_add - Insert a node after a given node in a circular list
  * @node: Pointer to the list_head structure to add.
- * @head: Pointer to the list_head structure representing the list head.
+ * @head: Pointer to the list_head structure after which to add the new node.
  *
  * Adds the specified @node immediately after @head in a circular doubly-linked
- * list, effectively placing it at the beginning. The existing first node, if
- * any, shifts to follow @node, and the list's circular structure is maintained.
+ * list. The node that previously followed @head will now follow @node, and the
+ * list's circular structure is maintained.
  */
 static inline void list_add(struct list_head *node, struct list_head *head)
 {

scripts/checksums

@@ -1,3 +1,3 @@
 db6784ff3917888db4d1dceaa0570d99ed40e762  queue.h
-9be9666430f392924f5d27caa71a412527bf9267  list.h
+5179cf8f5aafbc6cb8e8d7b898ef3798cfe85613  list.h
 3bb0192cee08d165fd597a9f6fbb404533e28fcf  scripts/check-commitlog.sh