__COPY_TO_USER(9)                   Memory Management in Linux                  __COPY_TO_USER(9)



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

SYNOPSIS
       unsigned long __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 if pagefaults are enabled.

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.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                         __COPY_TO_USER(9)