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