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.