KFIFO_FROM_USER(9) FIFO Buffer KFIFO_FROM_USER(9)
NAME
kfifo_from_user - puts some data from user space into the fifo
SYNOPSIS
kfifo_from_user(fifo, from, len, copied);
ARGUMENTS
fifo
address of the fifo to be used
from
pointer to the data to be added
len
the length of the data to be added
copied
pointer to output variable to store the number of copied bytes
DESCRIPTION
This macro copies at most len bytes from the from into the fifo, depending of the available space 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 3.10 June 2014 KFIFO_FROM_USER(9)
