[PATCH] drm/i915: Mark expected switch fall-throughs

[Gustavo A. R. Silva]

Hi Joonas,

Quoting Joonas Lahtinen <joonas.lahtinen at linux.intel.com>:

> On Mon, 2017-11-27 at 16:17 -0600, Gustavo A. R. Silva wrote:
>> In preparation to enabling -Wimplicit-fallthrough, mark switch cases
>> where we are expecting to fall through.
>
> I have to say I'm totally not sold on regexps matching comment
> contents. Was something more explicit ever considered? Like:
>
> #define FALLTHROUGH __attribute__((fallthrough));
>
> With the appropriate version checks, of course.
>

One of the arguments is that comments lets us leverage the existing  
static analyzers.

We've been discussing this during the last week, feel free to join the  
discussion:

http://www.spinics.net/lists/kernel/msg2659908.html
http://www.spinics.net/lists/kernel/msg2659906.html

Thanks!
--
Gustavo A. R. Silva