__clear_user - Zero a block of memory in user space, with less checking.
2. SYNOPSIS ▲
unsigned long __clear_user(void __user * to , unsigned long n );
3. ARGUMENTS ▲
Destination address, in user space.
Number of bytes to zero.
4. 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.
5. COPYRIGHT ▲