__clear_user(9)
NAME
__clear_user - Zero a block of memory in user space, with less
checking.
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. Caller must check the specified
block with access_ok before calling this function.
Returns number of bytes that could not be cleared. On success, this
will be zero.