linux-kernel - Re: [PATCH v2 1/2] gpiolib: Kill unused GPIOF

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:   Thu, 1 Jun 2023 09:53:08 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Arnd Bergmann <arnd@...db.de>, linux-gpio@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-doc-tw-discuss@...ts.sourceforge.net,
        Linus Walleij <linus.walleij@...aro.org>,
        Jonathan Corbet <corbet@....net>, Alex Shi <alexs@...nel.org>,
        Yanteng Si <siyanteng@...ngson.cn>,
        Hu Haowen <src.res@...il.cn>
Subject: Re: [PATCH v2 1/2] gpiolib: Kill unused GPIOF_EXPORT and Co

On Tue, May 30, 2023 at 12:14 AM Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:
>
> There is no use of the GPIOF_EXPORT in the kernel. Kill it for good.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
> ---
> v2: added tag (Linus)
>  Documentation/driver-api/gpio/legacy.rst                    | 3 ---
>  Documentation/translations/zh_CN/driver-api/gpio/legacy.rst | 3 ---
>  Documentation/translations/zh_TW/gpio.txt                   | 3 ---
>  drivers/gpio/gpiolib-legacy.c                               | 6 ------
>  include/linux/gpio.h                                        | 5 -----
>  5 files changed, 20 deletions(-)
>
> diff --git a/Documentation/driver-api/gpio/legacy.rst b/Documentation/driver-api/gpio/legacy.rst
> index 78372853c6d4..c5f98a78499f 100644
> --- a/Documentation/driver-api/gpio/legacy.rst
> +++ b/Documentation/driver-api/gpio/legacy.rst
> @@ -322,9 +322,6 @@ where 'flags' is currently defined to specify the following properties:
>         * GPIOF_OPEN_DRAIN      - gpio pin is open drain type.
>         * GPIOF_OPEN_SOURCE     - gpio pin is open source type.
>
> -       * GPIOF_EXPORT_DIR_FIXED        - export gpio to sysfs, keep direction
> -       * GPIOF_EXPORT_DIR_CHANGEABLE   - also export, allow changing direction
> -
>  since GPIOF_INIT_* are only valid when configured as output, so group valid
>  combinations as:
>
> diff --git a/Documentation/translations/zh_CN/driver-api/gpio/legacy.rst b/Documentation/translations/zh_CN/driver-api/gpio/legacy.rst
> index 84ce2322fdba..8720970393fb 100644
> --- a/Documentation/translations/zh_CN/driver-api/gpio/legacy.rst
> +++ b/Documentation/translations/zh_CN/driver-api/gpio/legacy.rst
> @@ -297,9 +297,6 @@ gpio_request()前将这类细节配置好，例如使用引脚控制子系统的
>         * GPIOF_OPEN_DRAIN      - gpio引脚为开漏信号
>         * GPIOF_OPEN_SOURCE     - gpio引脚为源极开路信号
>
> -       * GPIOF_EXPORT_DIR_FIXED        - 将 gpio 导出到 sysfs，并保持方向
> -       * GPIOF_EXPORT_DIR_CHANGEABLE   - 同样是导出, 但允许改变方向
> -
>  因为 GPIOF_INIT_* 仅有在配置为输出的时候才存在,所以有效的组合为:
>
>         * GPIOF_IN              - 配置为输入
> diff --git a/Documentation/translations/zh_TW/gpio.txt b/Documentation/translations/zh_TW/gpio.txt
> index 62e560ffe628..e0b96d897fa7 100644
> --- a/Documentation/translations/zh_TW/gpio.txt
> +++ b/Documentation/translations/zh_TW/gpio.txt
> @@ -303,9 +303,6 @@ gpio_request()前將這類細節配置好，例如使用 pinctrl 子系統的映
>         * GPIOF_OPEN_DRAIN      - gpio引腳爲開漏信號
>         * GPIOF_OPEN_SOURCE     - gpio引腳爲源極開路信號
>
> -       * GPIOF_EXPORT_DIR_FIXED        - 將 gpio 導出到 sysfs，並保持方向
> -       * GPIOF_EXPORT_DIR_CHANGEABLE   - 同樣是導出, 但允許改變方向
> -
>  因爲 GPIOF_INIT_* 僅有在配置爲輸出的時候才存在,所以有效的組合爲:
>
>         * GPIOF_IN              - 配置爲輸入
> diff --git a/drivers/gpio/gpiolib-legacy.c b/drivers/gpio/gpiolib-legacy.c
> index 028f7f504209..969f737012f6 100644
> --- a/drivers/gpio/gpiolib-legacy.c
> +++ b/drivers/gpio/gpiolib-legacy.c
> @@ -50,12 +50,6 @@ int gpio_request_one(unsigned gpio, unsigned long flags, const char *label)
>         if (err)
>                 goto free_gpio;
>
> -       if (flags & GPIOF_EXPORT) {
> -               err = gpiod_export(desc, flags & GPIOF_EXPORT_CHANGEABLE);
> -               if (err)
> -                       goto free_gpio;
> -       }
> -
>         return 0;
>
>   free_gpio:
> diff --git a/include/linux/gpio.h b/include/linux/gpio.h
> index 8528353e073b..86963a00b018 100644
> --- a/include/linux/gpio.h
> +++ b/include/linux/gpio.h
> @@ -38,11 +38,6 @@ struct device;
>  /* Gpio pin is open source */
>  #define GPIOF_OPEN_SOURCE      (1 << 4)
>
> -#define GPIOF_EXPORT           (1 << 5)
> -#define GPIOF_EXPORT_CHANGEABLE        (1 << 6)
> -#define GPIOF_EXPORT_DIR_FIXED (GPIOF_EXPORT)
> -#define GPIOF_EXPORT_DIR_CHANGEABLE (GPIOF_EXPORT | GPIOF_EXPORT_CHANGEABLE)
> -
>  /**
>   * struct gpio - a structure describing a GPIO with configuration
>   * @gpio:      the GPIO number
> --
> 2.40.0.1.gaa8946217a0b
>

Both applied, thanks!

Bart