linux-kernel - Re: [PATCH] acpi/hmat: Update acpi_hmat_type enum with ACPI_HMAT_TYPE

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Date:   Thu, 18 Apr 2019 08:56:40 -0600
From:   Keith Busch <keith.busch@...el.com>
To:     Alison Schofield <alison.schofield@...el.com>
Cc:     rjw@...ysocki.net, robert.moore@...el.com, erik.schmauss@...el.com,
        linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] acpi/hmat: Update acpi_hmat_type enum with
 ACPI_HMAT_TYPE_PROXIMITY

On Wed, Apr 17, 2019 at 11:13:10AM -0700, Alison Schofield wrote:
> ACPI 6.3 changed the subtable "Memory Subsystem Address Range Structure"
> to "Memory Proximity Domain Attributes Structure".
> 
> Updating and renaming of the structure was included in commit:
> ACPICA: ACPI 6.3: HMAT updates (9a8d961f1ef835b0d338fbe13da03cb424e87ae5)

I was not really happy with that HMAT update. Platforms implementing
6.2's HMAT continue to exist even if 6.3 isn't backward compatible. We
just lost the original subtable definition.