KFIFO_TO_USER(9)                           FIFO Buffer                           KFIFO_TO_USER(9)



NAME
       kfifo_to_user - copies data from the fifo into user space

SYNOPSIS
       kfifo_to_user(fifo, to, len, copied);

ARGUMENTS
       fifo
           address of the fifo to be used

       to
           where the data must be copied

       len
           the size of the destination buffer

       copied
           pointer to output variable to store the number of copied bytes

DESCRIPTION
       This macro copies at most len bytes from the fifo into the to buffer and returns
       -EFAULT/0.

       Note that with only one concurrent reader and one concurrent writer, you don't need extra
       locking to use these macro.

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