Re: [tip:perf/core] perf: Update perf_event_type documentation

From: Vince Weaver
Date: Fri Jul 26 2013 - 23:19:17 EST

On Fri, 26 Jul 2013, Peter Zijlstra wrote:

> On Thu, Jul 25, 2013 at 11:20:24PM -0400, Vince Weaver wrote:
> >
> > a thing that personally bothers me are these imaginary struct definitions
> > added as part of the documentation that aren't actually available in the
> > public perf_event.h
> >
> > I can see why it's done, but it can be confusing picking out in later
> > definitions which struct fields are real and which ones are conceptual.
> Would it help if we changed the syntax to not look as much as real C
> would?

I've been thinking and I can't really think of a clearer way to present
the layout. So I guess it's fine the way it is. Hopefully not many
people are stuck having to implement code based on header file comments

> > It might be clearer
> > if you stuck the perf_event_attr::sample_id_all qualifier each
> > place you add the sample_id field.
> Ah, I actually considered that but then got lazy and used the 0 sized
> struct idea :/

It might just be me. For whatever reason the C parser in my head doesn't
handle GNU extensions like 0-sized structs.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at