Re: [Xen-devel] [PATCH] ACPI/cpuidle: remove unused "power" field from Cx state data

[Keir Fraser <keir@xxxxxxx>]

On 02/11/2012 13:12, "Jan Beulich" <JBeulich@xxxxxxxx> wrote:

> It has never been used for anything, and Linux 3.7 doesn't propagate
> this information anymore.
> 
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

Acked-by: Keir Fraser <keir@xxxxxxx>

> ---
> Konrad, on the pv-ops side it may be better to pass zero rather than
> leaving the field completely uninitialized.
> 
> --- a/xen/arch/x86/acpi/cpu_idle.c
> +++ b/xen/arch/x86/acpi/cpu_idle.c
> @@ -935,7 +935,6 @@ static void set_cx(
>      }
>  
>      cx->latency  = xen_cx->latency;
> -    cx->power    = xen_cx->power;
>      
>      cx->target_residency = cx->latency * latency_factor;
>      if ( cx->type == ACPI_STATE_C1 || cx->type == ACPI_STATE_C2 )
> --- a/xen/arch/x86/cpu/mwait-idle.c
> +++ b/xen/arch/x86/cpu/mwait-idle.c
> @@ -96,7 +96,6 @@ static const struct cpuidle_state {
> char  name[16];
> unsigned int flags;
> unsigned int exit_latency; /* in US */
> - int  power_usage; /* in mW */
> unsigned int target_residency; /* in US */
>  } *cpuidle_state_table;
>  
> @@ -479,7 +478,6 @@ static int mwait_idle_cpu_init(struct no
> cx->type = cstate;
> cx->address = get_driver_data(cstate);
> cx->entry_method = ACPI_CSTATE_EM_FFH;
> -  cx->power = cpuidle_state_table[cstate].power_usage;
> cx->latency = cpuidle_state_table[cstate].exit_latency;
> cx->target_residency =
> cpuidle_state_table[cstate].target_residency;
> --- a/xen/include/xen/cpuidle.h
> +++ b/xen/include/xen/cpuidle.h
> @@ -46,7 +46,6 @@ struct acpi_processor_cx
>      u32 address;
>      u32 latency;
>      u32 target_residency;
> -    u32 power;
>      u32 usage;
>      u64 time;
>  };
> 
> 
> 
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