linux-kernel - [PATCH 0/2] ftrace: kill the dead code in trace_sched

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Date:	Wed, 23 Jul 2014 21:34:44 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Namhyung Kim <namhyung@...nel.org>, Ingo Molnar <mingo@...hat.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 0/2] ftrace: kill the dead code in trace_sched_switch.c

On 07/23, Oleg Nesterov wrote:
>
> This motivated me to try to find something else unused. And it seems that
> almost all code in kernel/trace/trace_sched_switch.c is dead? Hmm, and
> probably even event_context_switch... I'll recheck and send the patch.

No, event_context_switch can't simply go away. But afaics the only user
is tracing_sched_switch_trace(), and the only caller of this function is
probe_wakeup_sched_switch(). Looks a bit strange.

After this patch we should probably move tracing_sched_switch_trace() and
tracing_sched_wakeup_trace() from trace_sched_switch.c to trace_sched_wakeup.c
and make them static. And perhaps we can also move the rest of this
code somewhere else and rm this file...

Oleg.

 kernel/trace/trace.h              |    3 -
 kernel/trace/trace_sched_switch.c |   88 -------------------------------------
 2 files changed, 0 insertions(+), 91 deletions(-)

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