tag	line	file	source code
write_pipe_fops	13	fs/fifo.c	extern struct file_operations write_pipe_fops;
write_pipe_fops	64	fs/fifo.c	filp->f_op = &write_pipe_fops;
write_pipe_fops	189	fs/pipe.c	struct file_operations write_pipe_fops = {
write_pipe_fops	258	fs/pipe.c	f[1]->f_op = &write_pipe_fops;