Provided by:
linux-doc-2.6.15_2.6.15-23.39_all 
NAME
__copy_to_user_inatomic - Copy a block of data into user space, with
less checking.
SYNOPSIS
unsigned long __must_check __copy_to_user_inatomic (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.