KFIFO_TO_USER(9) FIFO Buffer KFIFO_TO_USER(9)
NAME
kfifo_to_user - gets data from the FIFO and write it to user space
SYNOPSIS
int kfifo_to_user(struct kfifo * fifo, void __user * to, unsigned int len, unsigned * lenout);
ARGUMENTS
fifo
the fifo to be used.
to
where the data must be copied.
len
the size of the destination buffer.
lenout
pointer to output variable with copied data
DESCRIPTION
This function copies at most len bytes from the FIFO into the to buffer and 0 or -EFAULT.
Note that with only one concurrent reader and one concurrent writer, you don't need extra locking to use these functions.
COPYRIGHT
Kernel Hackers Manual 2.6. July 2010 KFIFO_TO_USER(9)
