linux-kernel - Re: [PATCH v3 1/3] ACPI : introduce macros for using the ACPI specification version

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Date:	Fri, 3 Jul 2015 13:16:35 +0800
From:	Hanjun Guo <guohanjun@...wei.com>
To:	Al Stone <al.stone@...aro.org>, <linux-acpi@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
CC:	<rjw@...ysocki.net>, <lenb@...nel.org>, <catalin.marinas@....com>,
	<will.deacon@....com>, <tglx@...utronix.de>,
	<jason@...edaemon.net>, <linux-kernel@...r.kernel.org>,
	<linaro-acpi@...ts.linaro.org>, <linaro-kernel@...ts.linaro.org>,
	<patches@...aro.org>
Subject: Re: [PATCH v3 1/3] ACPI : introduce macros for using the ACPI specification
 version

Hi Al,

On 2015/7/3 7:48, Al Stone wrote:
> Add the __ACPI_FADT_SPEC_VERSION() helper macro to build a proper version
> number from a major and minor revision number.  Add also macros that use
> the helper to construct the current version from the values in the FADT
> (i.e., ACPI_FADT_SPEC_VERSION) and both the 5.1 and 6.0 versions.
>
> These macros are added in order to simplify retrieving and comparing ACPI
> specification version numbers, since this is becoming a more frequent need.
> In particular, there are some architectures that require at least a certain
> version of the spec, and there are differences in some structure sizes that
> have changed with recent versions but can only be tracked by spec version
> number.
>
> Fixes: aeb823bbacc2 (ACPICA: ACPI 6.0: Add changes for FADT table.)

If I understand correctly, will it be (and for next two patches as well):

0cff8dc0099f (ACPICA: ACPI 6.0: Add changes for MADT table.)?

FADT table update was not introduce any regressions for ARM64
I think.

Thanks
Hanjun

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