linux-kernel - Re: [PATCH v4 2/5] acpi: Store CRC-32 hash of the _PLD in struct acpi

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Message-ID: <YcNuQYfbMcxlRkSP@smile.fi.intel.com>
Date:   Wed, 22 Dec 2021 20:28:17 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Prashant Malani <pmalani@...omium.org>,
        linux-acpi@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 2/5] acpi: Store CRC-32 hash of the _PLD in struct
 acpi_device

On Wed, Dec 22, 2021 at 05:32:55PM +0300, Heikki Krogerus wrote:
> Storing CRC-32 hash of the Physical Location of Device
> object (_PLD) with devices that have it. The hash is stored
> to a new struct acpi_device member "pld_crc".
> 
> The hash makes it easier to find devices that share a
> location, as there is no need to evaluate the entire object
> every time. Knowledge about devices that share a location
> can be used in device drivers that need to know the
> connections to other components inside a system. USB3 ports
> will for example always share their location with a USB2
> port.

...

> @@ -739,7 +752,6 @@ static inline void acpi_bus_put_acpi_device(struct acpi_device *adev)
>  
>  static inline int register_acpi_bus_type(void *bus) { return 0; }
>  static inline int unregister_acpi_bus_type(void *bus) { return 0; }
> -
>  #endif				/* CONFIG_ACPI */

Looks like a stray change.

-- 
With Best Regards,
Andy Shevchenko