138  * A callchain cursor is a single linked list that
147 	/* Indicate valid cursor node for LBR stitch */
160 	struct callchain_cursor_node	cursor;  member
195 		     struct callchain_cursor *cursor,
198 int callchain_merge(struct callchain_cursor *cursor,
201 void callchain_cursor_reset(struct callchain_cursor *cursor);
203 int callchain_cursor_append(struct callchain_cursor *cursor, u64 ip,
209 /* Close a cursor writing session. Initialize for the reader */
210 static inline void callchain_cursor_commit(struct callchain_cursor *cursor)  in callchain_cursor_commit()  argument
212 	if (cursor == NULL)  in callchain_cursor_commit()
214 	cursor->curr = cursor->first;  in callchain_cursor_commit()
215 	cursor->pos = 0;  in callchain_cursor_commit()
218 /* Cursor reading iteration helpers */
220 callchain_cursor_current(struct callchain_cursor *cursor)  in callchain_cursor_current()  argument
222 	if (cursor == NULL || cursor->pos == cursor->nr)  in callchain_cursor_current()
225 	return cursor->curr;  in callchain_cursor_current()
228 static inline void callchain_cursor_advance(struct callchain_cursor *cursor)  in callchain_cursor_advance()  argument
230 	cursor->curr = cursor->curr->next;  in callchain_cursor_advance()
231 	cursor->pos++;  in callchain_cursor_advance()
252 			      struct callchain_cursor *cursor, struct symbol **parent,