Re: [PATCH v4 2/5] acpi: Store CRC-32 hash of the _PLD in struct acpi_device
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: 2021-12-22 18:29:50
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linux-usb, lkml
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.
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quoted hunk ↗ jump to hunk
@@ -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