Re: [PATCH 2/8] tracing: create automated trace defines
From: Jeremy Fitzhardinge
Date: Wed Apr 15 2009 - 22:57:16 EST
Mathieu Desnoyers wrote:
Is your only problem the fact that tracepoints include rcupdate.h ?
No. That was the first roadblock, which caused massive cyclic
dependencies between includes and consequent failure to define
everything required. I solved that by pushing __DO_TRACE out of line.
Everything since then is a separate issue.
This
can easily be solved by moving rcu_read_(un)lock_sched_notrace to a
rcu-update-<insert meaningful name here> and include this header in
rcupdate.h and tracepoint.h.
I suppose, but I think pushing __do_trace_##name out of line is cleaner
anyway. And I think it's very important that tracepoint.h have a
*absolutely minimal* #include set, so that it can be safely included in
as many contexts as possible. asm/paravirt.h is complex enough as it
is, and I really don't want tracepoint bringing in any extra headers at
all. linux/types.h is about the only acceptable one.
If by doing these modifications we succeed in keeping the "void"
parameters working _and_ make your stuff to compile, I think we would
have done something great. :-)
The void issue is irritating, but relatively minor compared to the
rest. If everything else gets solved except for the need to pass a
dummy param to no-arg tracepoints, then I think it'll be a generally
useful facility.
J
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