Re: [PATCH] x86: intel_epb: Take CONFIG_PM into account

[Ingo Molnar]

* Rafael J. Wysocki <rjw@xxxxxxxxxxxxx> wrote:

> From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> 
> Commit b9c273babce7 (PM / arch: x86: MSR_IA32_ENERGY_PERF_BIAS sysfs
> interface) caused kernels built with CONFIG_PM unset to crash on
> systems supporting the Performance and Energy Bias Hint (EPB),
> because it attempts to add files to sysfs directories that don't
> exist on those systems.
> 
> Prevent that from happening by taking CONFIG_PM into account so
> that the code depending on it is not compiled at all when it is
> not set.
> 
> Fixes: b9c273babce7 (PM / arch: x86: MSR_IA32_ENERGY_PERF_BIAS sysfs interface)
> Reported-by: Ido Schimmel <idosch@xxxxxxxxxxxx>
> Tested-by: Ido Schimmel <idosch@xxxxxxxxxxxx>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> ---
>  arch/x86/kernel/cpu/intel_epb.c |   22 +++++++++++++++++++++-
>  1 file changed, 21 insertions(+), 1 deletion(-)

Acked-by: Ingo Molnar <mingo@xxxxxxxxxx>

Thanks,

	Ingo