kfifo_size(9) suse man page | unix.com

KFIFO_SIZE(9)							    FIFO Buffer 						     KFIFO_SIZE(9)

NAME
       kfifo_size - returns the size of the fifo in bytes

SYNOPSIS
       __must_check unsigned int kfifo_size(struct kfifo * fifo);

ARGUMENTS
       fifo
	   the fifo to be used.

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