122 	if (file->f_op && file->f_op->llseek)  in llseek()
123 		fn = file->f_op->llseek;  in llseek()
198 				if (file->f_op && (read = file->f_op->read) != NULL)  in sys_read()
222 				if (file->f_op && (write = file->f_op->write) != NULL)  in sys_write()
258 	if (!file->f_op)  in do_readv_writev()
303 	fnv = (type == VERIFY_WRITE ? file->f_op->readv : file->f_op->writev);  in do_readv_writev()
310 	fn = (type == VERIFY_WRITE ? file->f_op->read :  in do_readv_writev()
311 	      (io_fn_t) file->f_op->write);  in do_readv_writev()
358 	if (file->f_op && (file->f_mode & FMODE_READ) &&  in sys_readv()
359 	    (file->f_op->readv || file->f_op->read))  in sys_readv()
378 	if (file->f_op && (file->f_mode & FMODE_WRITE) &&  in sys_writev()
379 	    (file->f_op->writev || file->f_op->write))  in sys_writev()
409 	if (!file->f_op || !(read = file->f_op->read))  in sys_pread()
440 	if (!file->f_op || !(write = file->f_op->write))  in sys_pwrite()