Name

__copy_to_user — Copy a block of data into user space, with less checking.

Synopsis

unsigned long __must_check __copy_to_user (void __user *  to,
 const void *  from,
 unsigned long  n);

Arguments

to

Destination address, in user space.

from

Source address, in kernel space.

n

Number of bytes to copy.

Context

User context only. This function may sleep.

Description

Copy data from kernel space to user space. Caller must check the specified block with access_ok before calling this function.

Returns number of bytes that could not be copied. On success, this will be zero.