CLEAR_USER(9) Memory Management in Linux CLEAR_USER(9)

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.

COPYRIGHT Kernel Hackers Manual 2.6. January 2013 CLEAR_USER(9)