kfifo_from_user

Langue: en

Version: October 2010 (fedora - 01/12/10)

Section: 9 (Appels noyau Linux)

NAME

kfifo_from_user - puts some data from user space into the FIFO

SYNOPSIS

int kfifo_from_user(struct kfifo * fifo, const void __user * from, unsigned int len, unsigned * total);

ARGUMENTS

fifo

the fifo to be used.

from

pointer to the data to be added.

len

the length of the data to be added.

total

the actual returned data length.

DESCRIPTION

This function copies at most len bytes from the from into the FIFO depending and returns -EFAULT/0.

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