linux-kernel - Re: [PATCH 6/6] tracing/fastboot: Print ktime of sched events when boot tracing

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Date:	Sat, 11 Oct 2008 22:03:18 +0200
From:	"Frédéric Weisbecker" <fweisbec@...il.com>
To:	"Ingo Molnar" <mingo@...e.hu>
Cc:	"Arjan van de Ven" <arjan@...radead.org>,
	"Steven Rostedt" <rostedt@...dmis.org>,
	Linux-Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 6/6] tracing/fastboot: Print ktime of sched events when boot tracing

2008/10/10 Ingo Molnar <mingo@...e.hu>:
> hm, there's a new build failure:
>
> kernel/built-in.o: In function `boot_trace_init':
> trace_boot.c:(.text+0x5ee38): undefined reference to `sched_switch_trace'
> kernel/built-in.o: In function `disable_boot_trace':
> (.text+0x5eee1): undefined reference to `tracing_stop_cmdline_record'
> kernel/built-in.o: In function `enable_boot_trace':
> (.text+0x5ef11): undefined reference to `tracing_start_cmdline_record'
>
> this revert solves the problem:
>
> commit b80bebdc1718c02947468df227b7f4414d8dcce8
> Author: Ingo Molnar <mingo@...e.hu>
> Date:   Fri Oct 10 21:44:24 2008 +0200
>
>    Revert "tracing/fastboot: use sched switch tracer from boot tracer"
>
>    This reverts commit 124cecce4145c590ae391fe12962653be8a05658.
>
> Config attached.
>
>        Ingo
>

....I guess that could happen when the boot tracer is configured
whithout the sched_switch tracer.
I will send a patch to add this dependance on the Kconfig...

Thanks.
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