From: Frederic Weisbecker <fweisbec@gmail.com>
Date: Fri, 31 Oct 2008 11:57:20 +0000 (+0100)
Subject: tracing/fastboot: Enable boot tracing only during initcalls
X-Git-Tag: v2.6.29-rc1~586^2~96^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=71566a0d161edec70361b7f90f6e54af6a6d5d05;p=pandora-kernel.git

tracing/fastboot: Enable boot tracing only during initcalls

Impact: modify boot tracer

We used to disable the initcall tracing at a specified time (IE: end
of builtin initcalls). But we don't need it anymore. It will be
stopped when initcalls are finished.

However we want two things:

_Start this tracing only after pre-smp initcalls are finished.

_Since we are planning to trace sched_switches at the same time, we
want to enable them only during the initcall execution.

For this purpose, this patch introduce two functions to enable/disable
the sched_switch tracing during boot.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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