Provided by: linux-doc-2.6.15_2.6.15-23.39_all bug

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.