linux-kernel - Re: [PATCH] cpuidle: Remove unnecessary wrapper cpuidle_get_last

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Sun, 9 Sep 2018 21:43:09 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     kw@...ahl.im
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>
Subject: Re: [PATCH] cpuidle: Remove unnecessary wrapper cpuidle_get_last_residency()

On Fri, Sep 7, 2018 at 10:09 PM Fieah Lim <kw@...ahl.im> wrote:
>
> There's no magic inside, let's just make it more intuitive.

Again, please fix the changelog.  It is not useful as is.

> Signed-off-by: Fieah Lim <kw@...ahl.im>
> ---
>  drivers/cpuidle/governors/ladder.c |  2 +-
>  drivers/cpuidle/governors/menu.c   |  2 +-
>  include/linux/cpuidle.h            | 10 ----------
>  3 files changed, 2 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/cpuidle/governors/ladder.c b/drivers/cpuidle/governors/ladder.c
> index 704880a6612a..f0dddc66af26 100644
> --- a/drivers/cpuidle/governors/ladder.c
> +++ b/drivers/cpuidle/governors/ladder.c
> @@ -80,7 +80,7 @@ static int ladder_select_state(struct cpuidle_driver *drv,
>
>         last_state = &ldev->states[last_idx];
>
> -       last_residency = cpuidle_get_last_residency(dev) - drv->states[last_idx].exit_latency;
> +       last_residency = dev->last_residency - drv->states[last_idx].exit_latency;
>
>         /* consider promotion */
>         if (last_idx < drv->state_count - 1 &&
> diff --git a/drivers/cpuidle/governors/menu.c b/drivers/cpuidle/governors/menu.c
> index 1aef60d160eb..715520e339da 100644
> --- a/drivers/cpuidle/governors/menu.c
> +++ b/drivers/cpuidle/governors/menu.c
> @@ -492,7 +492,7 @@ static void menu_update(struct cpuidle_driver *drv, struct cpuidle_device *dev)
>                 measured_us = 9 * MAX_INTERESTING / 10;
>         } else {
>                 /* measured value */
> -               measured_us = cpuidle_get_last_residency(dev);
> +               measured_us = dev->last_residency;
>
>                 /* Deduct exit latency */
>                 if (measured_us > 2 * target->exit_latency)
> diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h
> index 4325d6fdde9b..d262f620890e 100644
> --- a/include/linux/cpuidle.h
> +++ b/include/linux/cpuidle.h
> @@ -99,16 +99,6 @@ struct cpuidle_device {
>  DECLARE_PER_CPU(struct cpuidle_device *, cpuidle_devices);
>  DECLARE_PER_CPU(struct cpuidle_device, cpuidle_dev);
>
> -/**
> - * cpuidle_get_last_residency - retrieves the last state's residency time
> - * @dev: the target CPU
> - */
> -static inline int cpuidle_get_last_residency(struct cpuidle_device *dev)
> -{
> -       return dev->last_residency;
> -}
> -
> -
>  /****************************
>   * CPUIDLE DRIVER INTERFACE *
>   ****************************/
> --
> 2.18.0
>