# Re: \[PATCH v2 2/2\] docs-rst: userspace: update verbs API details

- From: Matthew Wilcox \<willy@infradead.org\>
- Date: 2019-01-15 15:31:33 
- List: linux-doc
- Page: https://ratatoskr.run/linux-doc/2019/01/5484150
- Thread: https://ratatoskr.run/linux-doc/2019/01/5483921/t.md

```text
On Tue, Jan 15, 2019 at 12:26:31PM +0200, Joel Nider wrote:
> It is important to understand the existing framework when implementing
> a new verb. The majority of existing API functions are implemented using
> the write syscall, but this has been superceded by the ioctl syscall
> for new commands. This patch updates the documentation regarding how
> to go about implementing a new verb, focusing on the new ioctl
> interface.
> 
> The documentation is far from complete, but this is a good step in the
> right direction. Future patches can add more detail according to need.
> Also, the interface is still undergoing substantial changes so an
> effort was made to document only the stable parts so as to avoid
> incorrect information since documentation changes tend to lag behind
> code changes.

I think this is a horrible direction to take.  The current document is
clearly for _users_.  All this documentation you've added is for kernel
hackers.  It needs to go in a different file, or not be added at all.

```