[PATCH] drm/mm: Some doc polish

Jani Nikula jani.nikula at linux.intel.com
Thu Dec 29 11:04:29 UTC 2016

On Thu, 29 Dec 2016, Chris Wilson <chris at chris-wilson.co.uk> wrote:
> On Thu, Dec 29, 2016 at 11:35:48AM +0100, Daniel Vetter wrote:
>> On Wed, Dec 28, 2016 at 05:37:26PM +0000, Chris Wilson wrote:
>> > On Wed, Dec 28, 2016 at 05:57:40PM +0100, Daniel Vetter wrote:
>> > > @@ -230,23 +272,23 @@ static inline u64 drm_mm_hole_node_end(const struct drm_mm_node *hole_node)
>> > >  
>> > >  /**
>> > >   * drm_mm_for_each_node - iterator to walk over all allocated nodes
>> > > - * @entry: drm_mm_node structure to assign to in each iteration step
>> > > - * @mm: drm_mm allocator to walk
>> > > + * @entry: &drm_mm_node structure to assign to in each iteration step
>> > 
>> > If we have the &struct link, do we need to say "structure"?
>> > We use a mix of "&struct structure" and plain "&struct". Choose a style
>> > and make it consistent. (Bonus points for an easy to find style guide.)
>> There's also "struct &struct_name" and "&struct struct_name". Anything
>> goes really, and I just semi-randomly pick what reads reasonably well. The
>> issue with macros is that they don't have the types in the declaration
>> (compared to functions), that's why I added the &.
>> And I think indicating the text that it's a structure makes some sense,
>> since the link could also be to an enum.
> Does "&struct struct_name" render well in the html? I think that's the
> easiest style for us to remember since it matches C (and so also reads
> well for someone versed in C).

"&struct foo" turns the whole thing into a link while "struct &foo" only
makes foo a link and struct remains in normal body text style. I think
the former is more aesthetically pleasing. The main downside is that
"&struct foo" must not have a line break in between (the parser is just
a dumb line based regexp mess).


>> Anyway if you insist I can do some ocd for drm_mm, but for all of the drm
>> docs is a bit much.
> I don't insist, I just think having a recommended way of writing the
> stanzas not only reduce the cognitive burden of writing them but also
> reading them.
>> Oh and the style guides we have:
>> https://dri.freedesktop.org/docs/drm/doc-guide/sphinx.html#writing-documentation
>> https://dri.freedesktop.org/docs/drm/gpu/introduction.html#style-guidelines
> I said easy to find! :) Something like Documentation/WritingStyle
> -Chris

Jani Nikula, Intel Open Source Technology Center

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