[ltt-dev] LTTng-UST tracepoint API updates

[mathieu.desnoyers@efficios.com (Mathieu Desnoyers)]

Hi,

I introduced the following API changes for LTTng-UST, after receiving
very appropriate feedback:

    Tracepoint API change: rename TRACEPOINT_SYSTEM to TRACEPOINT_PROVIDER
    
    Eliminates the confusion between the first TRACEPOINT_EVENT "provider"
    argument and the "TRACEPOINT_SYSTEM", which need to be the same thing.
    
and made sure TRACEPOINT_PROVIDER always match TRACEPOINT_SYSTEM by
adding a compiler warning:

    Tracepoints: add provider mismatch check
    
Finally, rename TP_ARGS to TP_VARS, in preparation for combining
TP_PROTO and TP_ARGS:

    tracepoint API change: rename TP_ARGS to TP_VARS
    
    In preparation of folding of both TP_PROTO and TP_ARGS into TP_ARGS.

Hopefully I'll succeed to getting both TP_PROTO and TP_VARS combined
into TP_ARGS, but even if this does not work out, TP_VARS seems much
more appropriate than TP_ARGS here.

Thanks,

Mathieu

-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com