return 0;
 }
 
-ssize_t nfs_file_write(struct kiocb *iocb, const struct iovec *iov,
-                      unsigned long nr_segs, loff_t pos)
+ssize_t nfs_file_write(struct kiocb *iocb, struct iov_iter *from)
 {
        struct file *file = iocb->ki_filp;
        struct inode *inode = file_inode(file);
        unsigned long written = 0;
        ssize_t result;
-       size_t count = iov_length(iov, nr_segs);
-       struct iov_iter from;
-       iov_iter_init(&from, WRITE, iov, nr_segs, count);
+       size_t count = iov_iter_count(from);
+       loff_t pos = iocb->ki_pos;
 
        result = nfs_key_timeout_notify(file, inode);
        if (result)
                return result;
 
        if (file->f_flags & O_DIRECT)
-               return nfs_file_direct_write(iocb, &from, pos, true);
+               return nfs_file_direct_write(iocb, from, pos, true);
 
        dprintk("NFS: write(%pD2, %zu@%Ld)\n",
                file, count, (long long) pos);
        if (!count)
                goto out;
 
-       result = generic_file_aio_write(iocb, iov, nr_segs, pos);
+       result = generic_file_write_iter(iocb, from);
        if (result > 0)
                written = result;
 
 const struct file_operations nfs_file_operations = {
        .llseek         = nfs_file_llseek,
        .read           = new_sync_read,
-       .write          = do_sync_write,
+       .write          = new_sync_write,
        .read_iter      = nfs_file_read,
-       .aio_write      = nfs_file_write,
+       .write_iter     = nfs_file_write,
        .mmap           = nfs_file_mmap,
        .open           = nfs_file_open,
        .flush          = nfs_file_flush,
 
 ssize_t nfs_file_splice_read(struct file *, loff_t *, struct pipe_inode_info *,
                             size_t, unsigned int);
 int nfs_file_mmap(struct file *, struct vm_area_struct *);
-ssize_t nfs_file_write(struct kiocb *, const struct iovec *, unsigned long, loff_t);
+ssize_t nfs_file_write(struct kiocb *, struct iov_iter *);
 int nfs_file_release(struct inode *, struct file *);
 int nfs_lock(struct file *, int, struct file_lock *);
 int nfs_flock(struct file *, int, struct file_lock *);
 
 const struct file_operations nfs4_file_operations = {
        .llseek         = nfs_file_llseek,
        .read           = new_sync_read,
-       .write          = do_sync_write,
+       .write          = new_sync_write,
        .read_iter      = nfs_file_read,
-       .aio_write      = nfs_file_write,
+       .write_iter     = nfs_file_write,
        .mmap           = nfs_file_mmap,
        .open           = nfs4_file_open,
        .flush          = nfs_file_flush,