* Re: [PATCH v5 2/5] acpi: Store CRC-32 hash of the _PLD in struct acpi_device #forregzbot
[not found] ` <20220130164126.GA2942650@roeck-us.net>
@ 2022-02-05 5:17 ` Thorsten Leemhuis
0 siblings, 0 replies; only message in thread
From: Thorsten Leemhuis @ 2022-02-05 5:17 UTC (permalink / raw)
To: regressions
For the record:
#regzbot fixed-by: 04662bac0067e2fd7f243d6abaa4d779bce14114
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On 30.01.22 17:41, Guenter Roeck wrote:
> On Thu, Dec 23, 2021 at 11:16:17AM +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.
>>
>> Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
>
> Building ia64:tinyconfig ... failed
>
> ia64-linux-ld: drivers/acpi/scan.o: in function `__acpi_device_add':
> scan.c:(.text+0x27e2): undefined reference to `crc32_le'
>
> ACPI now depends on CRC32.
>
> #regzbot introduced: 882c982dada4d5
>
> Guenter
>
>> ---
>> drivers/acpi/scan.c | 16 ++++++++++++++++
>> include/acpi/acpi_bus.h | 1 +
>> 2 files changed, 17 insertions(+)
>>
>> diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
>> index 7ff55a197a583..113414c46b713 100644
>> --- a/drivers/acpi/scan.c
>> +++ b/drivers/acpi/scan.c
>> @@ -19,6 +19,7 @@
>> #include <linux/dma-map-ops.h>
>> #include <linux/platform_data/x86/apple.h>
>> #include <linux/pgtable.h>
>> +#include <linux/crc32.h>
>>
>> #include "internal.h"
>>
>> @@ -667,6 +668,19 @@ static int acpi_tie_acpi_dev(struct acpi_device *adev)
>> return 0;
>> }
>>
>> +static void acpi_store_pld_crc(struct acpi_device *adev)
>> +{
>> + struct acpi_pld_info *pld;
>> + acpi_status status;
>> +
>> + status = acpi_get_physical_device_location(adev->handle, &pld);
>> + if (ACPI_FAILURE(status))
>> + return;
>> +
>> + adev->pld_crc = crc32(~0, pld, sizeof(*pld));
>> + ACPI_FREE(pld);
>> +}
>> +
>> static int __acpi_device_add(struct acpi_device *device,
>> void (*release)(struct device *))
>> {
>> @@ -725,6 +739,8 @@ static int __acpi_device_add(struct acpi_device *device,
>> if (device->wakeup.flags.valid)
>> list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list);
>>
>> + acpi_store_pld_crc(device);
>> +
>> mutex_unlock(&acpi_device_lock);
>>
>> if (device->parent)
>> diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
>> index 8e87ead2af341..f8c945418df23 100644
>> --- a/include/acpi/acpi_bus.h
>> +++ b/include/acpi/acpi_bus.h
>> @@ -360,6 +360,7 @@ struct acpi_gpio_mapping;
>>
>> /* Device */
>> struct acpi_device {
>> + u32 pld_crc;
>> int device_type;
>> acpi_handle handle; /* no handle for fixed hardware */
>> struct fwnode_handle fwnode;
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[not found] <20211223081620.45479-1-heikki.krogerus@linux.intel.com>
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[not found] ` <20220130164126.GA2942650@roeck-us.net>
2022-02-05 5:17 ` [PATCH v5 2/5] acpi: Store CRC-32 hash of the _PLD in struct acpi_device #forregzbot Thorsten Leemhuis
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