linux-kernel - Re: [PATCH v3 06/12] PM: EM: Refactor struct em_perf_domain and add default

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Message-ID: <d4bb4680-fbde-00f5-32ca-4e5478f73647@arm.com>
Date:   Wed, 16 Aug 2023 15:04:10 +0200
From:   Dietmar Eggemann <dietmar.eggemann@....com>
To:     Lukasz Luba <lukasz.luba@....com>, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, rafael@...nel.org
Cc:     rui.zhang@...el.com, amit.kucheria@...durent.com,
        amit.kachhap@...il.com, daniel.lezcano@...aro.org,
        viresh.kumar@...aro.org, len.brown@...el.com, pavel@....cz,
        Pierre.Gondois@....com, ionela.voinescu@....com,
        mhiramat@...nel.org
Subject: Re: [PATCH v3 06/12] PM: EM: Refactor struct em_perf_domain and add
 default_table

On 21/07/2023 17:50, Lukasz Luba wrote:
> The Energy Model is going to support runtime modifications. Refactor old
> implementation which accessed struct em_perf_state and introduce
> em_perf_domain::default_table to clean up the design. This new field
> will help to better distinguish 2 performance state tables.
> 
> Update all drivers or frameworks which used the old field:
> em_perf_domain::table and now should use em_perf_domain::default_table.
> 

This doesn't compile:

  SYNC    include/config/auto.conf.cmd
  UPD     include/config/kernel.release
  UPD     include/generated/utsrelease.h
  CC      arch/arm64/kernel/asm-offsets.s
In file included from ./include/linux/device.h:16,
                 from ./include/linux/acpi.h:14,
                 from ./include/acpi/apei.h:9,
                 from ./include/acpi/ghes.h:5,
                 from ./include/linux/arm_sdei.h:8,
                 from arch/arm64/kernel/asm-offsets.c:10:
./include/linux/energy_model.h: In function ‘em_cpu_energy’:
./include/linux/energy_model.h:256:10: error: ‘struct em_perf_domain’ has no member named ‘table’
  256 |  ps = &pd->table[pd->nr_perf_states - 1];
      |          ^~
./include/linux/energy_model.h:266:34: error: ‘struct em_perf_domain’ has no member named ‘table’
  266 |  i = em_pd_get_efficient_state(pd->table, pd->nr_perf_states, freq,
      |                                  ^~
./include/linux/energy_model.h:268:10: error: ‘struct em_perf_domain’ has no member named ‘table’
  268 |  ps = &pd->table[i];
      |          ^~
make[2]: *** [scripts/Makefile.build:116: arch/arm64/kernel/asm-offsets.s] Error 1
make[1]: *** [/opt/git/kernel_org/Makefile:1275: prepare0] Error 2
make: *** [Makefile:234: __sub-make] Error 2

In v2 this patch was much later in the set.