Name
container_of — 
     cast a member of a structure out to the containing structure
 
Synopsis
|  container_of ( | ptr, | 
|  | type, | 
|  | member ); | 
 
Arguments
- ptr
- 
     the pointer to the member.
     
- type
- 
     the type of the container struct this is embedded in.
     
- member
- 
     the name of the member within the struct.