do_loop_readv_writev 1122 fs/compat.c    		ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn);
do_loop_readv_writev  600 fs/read_write.c 		ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn);
do_loop_readv_writev   13 fs/read_write.h ssize_t do_loop_readv_writev(struct file *filp, struct iovec *iov,