pipefifo_fops    2036 fs/inode.c     		inode->i_fop = &pipefifo_fops;
pipefifo_fops     171 fs/internal.h  extern const struct file_operations pipefifo_fops;
pipefifo_fops     745 fs/pipe.c      	inode->i_fop = &pipefifo_fops;
pipefifo_fops     778 fs/pipe.c      				&pipefifo_fops);
pipefifo_fops     788 fs/pipe.c      				  &pipefifo_fops);
pipefifo_fops    1023 fs/pipe.c      const struct file_operations pipefifo_fops = {
pipefifo_fops    1145 fs/pipe.c      	return file->f_op == &pipefifo_fops ? file->private_data : NULL;