KFIFO_FROM_USER
Section: FIFO Buffer (9)
Updated: February 2011
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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