linux-kernel - Re: TRACE_EVENT() declarations belong to include/trace/

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Message-ID: <20100412220451.GG8285@nowhere>
Date:	Tue, 13 Apr 2010 00:04:53 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	Anton Blanchard <anton@...ba.org>,
	Paul Mackerras <paulus@...ba.org>, linux-kernel@...r.kernel.org
Subject: Re: TRACE_EVENT() declarations belong to include/trace/

On Mon, Apr 12, 2010 at 05:45:11PM -0400, Mathieu Desnoyers wrote:
> Why are there TRACE_EVENT() declarations in arch/powerpc/include/asm/trace.h for
> irq_entry/exit ?
> 
> What's so special about them that they cannot be put in linux/trace/ ?
> 
> I'm all for the trace_irq_entry/exit instrumentation, but I don't see any good
> in adding event declarations outside of include/trace/.
> 
> Thanks,


Yeah,

If this is to trace all irqs, then it seems to me the wrong way.
We already have generic irq_handler_entry and irq_handler_exit trace events.

May be those in powerpc are here to get the spurious irqs by computing
a diff between generic and arch irq events? In which case
it would be better to get dedicated spurious irq tracepoints.

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