linux-kernel - Re: [PATCH 05/33] ACPI / PPTT: Find cache level by cache-id

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Message-ID: <5bb98ec3-f918-455e-9f13-71eb0506ad6c@arm.com>
Date: Thu, 28 Aug 2025 16:57:44 +0100
From: James Morse <james.morse@....com>
To: Markus Elfring <Markus.Elfring@....de>,
 linux-arm-kernel@...ts.infradead.org, linux-acpi@...r.kernel.org,
 devicetree@...r.kernel.org
Cc: LKML <linux-kernel@...r.kernel.org>,
 Amit Singh Tomar <amitsinght@...vell.com>,
 Baisheng Gao <baisheng.gao@...soc.com>,
 Baolin Wang <baolin.wang@...ux.alibaba.com>, bobo.shaobowang@...wei.com,
 Carl Worth <carl@...amperecomputing.com>,
 Catalin Marinas <catalin.marinas@....com>, Conor Dooley
 <conor+dt@...nel.org>, Danilo Krummrich <dakr@...nel.org>,
 Dave Martin <Dave.Martin@....com>, David Hildenbrand <david@...hat.com>,
 Drew Fustini <dfustini@...libre.com>,
 D Scott Phillips <scott@...amperecomputing.com>,
 Fenghua Yu <fenghuay@...dia.com>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Hanjun Guo <guohanjun@...wei.com>, Jamie Iles <quic_jiles@...cinc.com>,
 Jonathan Cameron <Jonathan.Cameron@...wei.com>, Koba Ko <kobak@...dia.com>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Len Brown <lenb@...nel.org>,
 Linu Cherian <lcherian@...vell.com>,
 Lorenzo Pieralisi <lpieralisi@...nel.org>,
 Peter Newman <peternewman@...gle.com>, "Rafael J. Wysocki"
 <rafael@...nel.org>, Rex Nie <rex.nie@...uarmicro.com>,
 Rob Herring <robh@...nel.org>, Rohit Mathew <rohit.mathew@....com>,
 Shanker Donthineni <sdonthineni@...dia.com>,
 Shaopeng Tan <tan.shaopeng@...itsu.com>, Sudeep Holla
 <sudeep.holla@....com>, Will Deacon <will@...nel.org>,
 Xin Hao <xhao@...ux.alibaba.com>
Subject: Re: [PATCH 05/33] ACPI / PPTT: Find cache level by cache-id

Hi Markus,

On 23/08/2025 13:14, Markus Elfring wrote:
> …
>> +++ b/include/linux/acpi.h
> …
>> @@ -221,6 +222,17 @@ void acpi_reserve_initial_tables (void);
>>  void acpi_table_init_complete (void);
>>  int acpi_table_init (void);
> …
>> +DEFINE_FREE(acpi_table, struct acpi_table_header *, if (!IS_ERR(_T)) acpi_put_table(_T))
>> +
>>  int acpi_table_parse(char *id, acpi_tbl_table_handler handler);
> …
> 
> How do you think about to offer the addition of such a special macro call
> by another separate update step?
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?h=v6.17-rc2#n81

As it goes via the same tree I don't think there is a strong reason either way.

Dave points out on an earlier patch that the PPTT code doesn't care about the reference
counting anyway, so this stuff can go.

Thanks,

James