diff --git a/fs/read_write.c b/fs/read_write.c
index 334252c60..b479ad8 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -1085,7 +1085,7 @@ ssize_t vfs_iter_write(struct file *file, struct iov_iter *iter, loff_t *ppos,
 }
 EXPORT_SYMBOL(vfs_iter_write);
 
-static ssize_t vfs_readv(struct file *file, const struct iovec __user *vec,
+ssize_t vfs_readv(struct file *file, const struct iovec __user *vec,
 		  unsigned long vlen, loff_t *pos, rwf_t flags)
 {
 	struct iovec iovstack[UIO_FASTIOV];
diff --git a/fs/splice.c b/fs/splice.c
index abb19d3..ce75aec 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -342,6 +342,89 @@ const struct pipe_buf_operations nosteal_pipe_buf_ops = {
 };
 EXPORT_SYMBOL(nosteal_pipe_buf_ops);
 
+static ssize_t kernel_readv(struct file *file, const struct kvec *vec,
+			    unsigned long vlen, loff_t offset)
+{
+	mm_segment_t old_fs;
+	loff_t pos = offset;
+	ssize_t res;
+
+	old_fs = get_fs();
+	set_fs(KERNEL_DS);
+	/* The cast to a user pointer is valid due to the set_fs() */
+	res = vfs_readv(file, (const struct iovec __user *)vec, vlen, &pos, 0);
+	set_fs(old_fs);
+
+	return res;
+}
+
+static ssize_t default_file_splice_read(struct file *in, loff_t *ppos,
+				 struct pipe_inode_info *pipe, size_t len,
+				 unsigned int flags)
+{
+	struct kvec *vec, __vec[PIPE_DEF_BUFFERS];
+	struct iov_iter to;
+	struct page **pages;
+	unsigned int nr_pages;
+	unsigned int mask;
+	size_t offset, base, copied = 0;
+	ssize_t res;
+	int i;
+
+	if (pipe_full(pipe->head, pipe->tail, pipe->max_usage))
+		return -EAGAIN;
+
+	/*
+	 * Try to keep page boundaries matching to source pagecache ones -
+	 * it probably won't be much help, but...
+	 */
+	offset = *ppos & ~PAGE_MASK;
+
+	iov_iter_pipe(&to, READ, pipe, len + offset);
+
+	res = iov_iter_get_pages_alloc(&to, &pages, len + offset, &base);
+	if (res <= 0)
+		return -ENOMEM;
+
+	nr_pages = DIV_ROUND_UP(res + base, PAGE_SIZE);
+
+	vec = __vec;
+	if (nr_pages > PIPE_DEF_BUFFERS) {
+		vec = kmalloc_array(nr_pages, sizeof(struct kvec), GFP_KERNEL);
+		if (unlikely(!vec)) {
+			res = -ENOMEM;
+			goto out;
+		}
+	}
+
+	mask = pipe->ring_size - 1;
+	pipe->bufs[to.head & mask].offset = offset;
+	pipe->bufs[to.head & mask].len -= offset;
+
+	for (i = 0; i < nr_pages; i++) {
+		size_t this_len = min_t(size_t, len, PAGE_SIZE - offset);
+		vec[i].iov_base = page_address(pages[i]) + offset;
+		vec[i].iov_len = this_len;
+		len -= this_len;
+		offset = 0;
+	}
+
+	res = kernel_readv(in, vec, nr_pages, *ppos);
+	if (res > 0) {
+		copied = res;
+		*ppos += res;
+	}
+
+	if (vec != __vec)
+		kfree(vec);
+out:
+	for (i = 0; i < nr_pages; i++)
+		put_page(pages[i]);
+	kvfree(pages);
+	iov_iter_advance(&to, copied);	/* truncates and discards */
+	return res;
+}
+
 /*
  * Send 'sd->len' bytes to socket from 'sd->file' at position 'sd->pos'
  * using sendpage(). Return the number of bytes sent.
@@ -725,6 +808,33 @@ iter_file_splice_write(struct pipe_inode_info *pipe, struct file *out,
 
 EXPORT_SYMBOL(iter_file_splice_write);
 
+static int write_pipe_buf(struct pipe_inode_info *pipe, struct pipe_buffer *buf,
+			  struct splice_desc *sd)
+{
+	int ret;
+	void *data;
+	loff_t tmp = sd->pos;
+
+	data = kmap(buf->page);
+	ret = __kernel_write(sd->u.file, data + buf->offset, sd->len, &tmp);
+	kunmap(buf->page);
+
+	return ret;
+}
+
+static ssize_t default_file_splice_write(struct pipe_inode_info *pipe,
+					 struct file *out, loff_t *ppos,
+					 size_t len, unsigned int flags)
+{
+	ssize_t ret;
+
+	ret = splice_from_pipe(pipe, out, ppos, len, flags, write_pipe_buf);
+	if (ret > 0)
+		*ppos += ret;
+
+	return ret;
+}
+
 /**
  * generic_splice_sendpage - splice data from a pipe to a socket
  * @pipe:	pipe to splice from
@@ -746,23 +856,15 @@ ssize_t generic_splice_sendpage(struct pipe_inode_info *pipe, struct file *out,
 
 EXPORT_SYMBOL(generic_splice_sendpage);
 
-static int warn_unsupported(struct file *file, const char *op)
-{
-	pr_debug_ratelimited(
-		"splice %s not supported for file %pD4 (pid: %d comm: %.20s)\n",
-		op, file, current->pid, current->comm);
-	return -EINVAL;
-}
-
 /*
  * Attempt to initiate a splice from pipe to file.
  */
 static long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
 			   loff_t *ppos, size_t len, unsigned int flags)
 {
-	if (unlikely(!out->f_op->splice_write))
-		return warn_unsupported(out, "write");
-	return out->f_op->splice_write(pipe, out, ppos, len, flags);
+	if (out->f_op->splice_write)
+		return out->f_op->splice_write(pipe, out, ppos, len, flags);
+	return default_file_splice_write(pipe, out, ppos, len, flags);
 }
 
 /*
@@ -784,9 +886,9 @@ static long do_splice_to(struct file *in, loff_t *ppos,
 	if (unlikely(len > MAX_RW_COUNT))
 		len = MAX_RW_COUNT;
 
-	if (unlikely(!in->f_op->splice_read))
-		return warn_unsupported(in, "read");
-	return in->f_op->splice_read(in, ppos, pipe, len, flags);
+	if (in->f_op->splice_read)
+		return in->f_op->splice_read(in, ppos, pipe, len, flags);
+	return default_file_splice_read(in, ppos, pipe, len, flags);
 }
 
 /**
diff --git a/include/linux/fs.h b/include/linux/fs.h
index fc0cf45..aba30ad 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1907,6 +1907,8 @@ ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector,
 
 extern ssize_t vfs_read(struct file *, char __user *, size_t, loff_t *);
 extern ssize_t vfs_write(struct file *, const char __user *, size_t, loff_t *);
+extern ssize_t vfs_readv(struct file *, const struct iovec __user *,
+		unsigned long, loff_t *, rwf_t);
 extern ssize_t vfs_copy_file_range(struct file *, loff_t , struct file *,
 				   loff_t, size_t, unsigned int);
 extern ssize_t generic_copy_file_range(struct file *file_in, loff_t pos_in,