Name
list_replace — 
     replace old entry by new one
 
Synopsis
| void list_replace ( | struct list_head * old, | 
|  | struct list_head * new ); | 
 
Arguments
- old
- 
     the element to be replaced
     
- new
- 
     the new element to insert
     
Description
   If old was empty, it will be overwritten.