Zero a block of memory in user space, with less checking.
unsigned long __clear_user (
|void __user * to, |
| ||unsigned long n|
void __user * to
Destination address, in user space.
unsigned long n
Number of bytes to zero.
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.