suse man page for kfifo_in_rec

KFIFO_IN_REC(9) 						    FIFO Buffer 						   KFIFO_IN_REC(9)

NAME
       kfifo_in_rec - puts some record data into the FIFO

SYNOPSIS
       __must_check unsigned int kfifo_in_rec(struct kfifo * fifo, void * from, unsigned int n, unsigned int recsize);

ARGUMENTS
       fifo
	   the fifo to be used.

       from
	   the data to be added.

       n
	   the length of the data to be added.

       recsize
	   size of record field

DESCRIPTION
       This function copies n bytes from the from into the FIFO and returns the number of bytes which cannot be copied. A returned value greater
       than the n value means that the record doesn't fit into the buffer.

       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_IN_REC(9)