linux-kernel - Re: [RFC PATCH] power_trace: move power

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Date:	Wed, 26 Jan 2011 12:03:59 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Lai Jiangshan <laijs@...fujitsu.com>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	Arjan van de Ven <arjan@...ux.intel.com>,
	Ingo Molnar <mingo@...hat.com>,
	Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Frederic Weisbecker <fweisbec@...il.com>,
	"H. Peter Anvin" <hpa@...or.com>, Yinghai Lu <yinghai@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Tejun Heo <tj@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH] power_trace: move power_trace to kernel/power/


* Lai Jiangshan <laijs@...fujitsu.com> wrote:

> 
> I think kernel/trace/ is the place for the tracing implementation files,
> it is not a good place for tracepoint creation. Any subsystem should
> creates tracepoints at its owner location, see also all other CREATE_TRACE_POINTS.
> For example: net-traces.c is in the net/core/ directory.
> 
> Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com>
> ---
> diff --git a/kernel/Makefile b/kernel/Makefile
> index 353d3fe..25c3767 100644
> --- a/kernel/Makefile
> +++ b/kernel/Makefile
> @@ -55,6 +55,7 @@ obj-$(CONFIG_MODULES) += module.o
>  obj-$(CONFIG_KALLSYMS) += kallsyms.o
>  obj-$(CONFIG_PM) += power/
>  obj-$(CONFIG_FREEZER) += power/
> +obj-$(CONFIG_TRACEPOINTS) += power/
>  obj-$(CONFIG_BSD_PROCESS_ACCT) += acct.o
>  obj-$(CONFIG_KEXEC) += kexec.o
>  obj-$(CONFIG_BACKTRACE_SELF_TEST) += backtracetest.o
> @@ -100,7 +101,6 @@ obj-$(CONFIG_FUNCTION_TRACER) += trace/
>  obj-$(CONFIG_TRACING) += trace/
>  obj-$(CONFIG_X86_DS) += trace/
>  obj-$(CONFIG_RING_BUFFER) += trace/
> -obj-$(CONFIG_TRACEPOINTS) += trace/
>  obj-$(CONFIG_SMP) += sched_cpupri.o
>  obj-$(CONFIG_IRQ_WORK) += irq_work.o
>  obj-$(CONFIG_PERF_EVENTS) += perf_event.o
> diff --git a/kernel/power/Makefile b/kernel/power/Makefile
> index c350e18..b5a74f5 100644
> --- a/kernel/power/Makefile
> +++ b/kernel/power/Makefile
> @@ -9,3 +9,4 @@ obj-$(CONFIG_HIBERNATION)	+= hibernate.o snapshot.o swap.o user.o \
>  				   block_io.o
>  
>  obj-$(CONFIG_MAGIC_SYSRQ)	+= poweroff.o
> +obj-$(CONFIG_TRACEPOINTS)	+= power-traces.o

What is 'power-traces'? Please name it power-events.c/power-events.o.

Thanks,

	Ingo
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