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.