tag	line	file	source code
rdwr_fifo_fops	86	fs/fifo.c	filp->f_op = &rdwr_fifo_fops;
rdwr_fifo_fops	308	fs/pipe.c	struct file_operations rdwr_fifo_fops = {
rdwr_fifo_fops	404	include/linux/fs.h	extern struct file_operations rdwr_fifo_fops;