kfifo_len(9) suse man page | unix.com

KFIFO_LEN(9)							    FIFO Buffer 						      KFIFO_LEN(9)

NAME
       kfifo_len - returns the number of used bytes in the FIFO

SYNOPSIS
       unsigned int kfifo_len(struct kfifo * fifo);

ARGUMENTS
       fifo
	   the fifo to be used.

COPYRIGHT
Kernel Hackers Manual 2.6.					     July 2010							      KFIFO_LEN(9)