[PATCH] sched: move CONFIG_IRQ_TIME_ACCOUNTING to common code

Ingo Molnar mingo at elte.hu
Tue Feb 7 08:29:07 UTC 2012

* Dmitry Antipov <dmitry.antipov at linaro.org> wrote:

> Since CONFIG_IRQ_TIME_ACCOUNTING is architecture-agnostic, 
> move it from x86 area to common code.
> Signed-off-by: Dmitry Antipov <dmitry.antipov at linaro.org>
> ---
>  arch/x86/Kconfig  |   11 -----------
>  lib/Kconfig.debug |   11 +++++++++++
>  2 files changed, 11 insertions(+), 11 deletions(-)

That's not enough, right now on x86 this code needs special 
architecture glue, see how the noirqtime flag is used to call 
into enable_sched_clock_irqtime() after TSC init.

So if you apply your patch and boot CONFIG_IRQ_TIME_ACCOUNTING=y 
on say an ARM system, nothing will be done, because 
sched_clock_irqtime is always zero.



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