Name
clear_user — 
  Zero a block of memory in user space.
 
Synopsis
| unsigned long clear_user ( | void __user * to, | 
|  | unsigned long n ); | 
 
Arguments
- to
- 
     Destination address, in user space.
     
- n
- 
     Number of bytes to zero.
     
Description
   Zero a block of memory in user space.
   
   Returns number of bytes that could not be cleared.
   On success, this will be zero.