list: make hlist_add_after() argument names match hlist_add_after_rcu()

The argument names for hlist_add_after() are poorly chosen because they
look the same as the ones for hlist_add_before() but have to be used
differently.

hlist_add_after_rcu() has made a better choice.

Signed-off-by: Ken Helias <[email protected]>
Cc: "Paul E. McKenney" <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Jeff Kirsher <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

include/linux/list.h

@@ -654,15 +654,15 @@ static inline void hlist_add_before(struct hlist_node *n,
 	*(n->pprev) = n;
 }
 
-static inline void hlist_add_after(struct hlist_node *n,
-					struct hlist_node *next)
+static inline void hlist_add_after(struct hlist_node *prev,
+				   struct hlist_node *n)
 {
-	next->next = n->next;
-	n->next = next;
-	next->pprev = &n->next;
+	n->next = prev->next;
+	prev->next = n;
+	n->pprev = &prev->next;
 
-	if(next->next)
-		next->next->pprev  = &next->next;
+	if (n->next)
+		n->next->pprev  = &n->next;
 }
 
 /* after that we'll appear to be on some hlist and hlist_del will work */