334 	if (!file->f_op->fallocate)  in vfs_fallocate()
338 	ret = file->f_op->fallocate(file, mode, offset, len);  in vfs_fallocate()
910 		f->f_op = &empty_fops;  in do_dentry_open()
927 	f->f_op = fops_get(inode->i_fop);  in do_dentry_open()
928 	if (WARN_ON(!f->f_op)) {  in do_dentry_open()
954 		open = f->f_op->open;  in do_dentry_open()
962 	     likely(f->f_op->read || f->f_op->read_iter))  in do_dentry_open()
965 	     likely(f->f_op->write || f->f_op->write_iter))  in do_dentry_open()
967 	if ((f->f_mode & FMODE_LSEEK) && !f->f_op->llseek)  in do_dentry_open()
1012 	fops_put(f->f_op);  in do_dentry_open()
1536 			filp->f_op)) {  in filp_flush()
1540 	if (filp->f_op->flush)  in filp_flush()
1541 		retval = filp->f_op->flush(filp, id);  in filp_flush()