linux-kernel - Re: [v5 10/34] arm_mpam: Add probe/remove for mpam msc driver and kbuild boiler plate

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Message-ID: <a567c3f9-f4b2-44bd-ad3c-326a1fd7bdd5@web.de>
Date: Tue, 18 Nov 2025 12:28:09 +0100
From: Markus Elfring <Markus.Elfring@....de>
To: Ben Horgan <ben.horgan@....com>, James Morse <james.morse@....com>,
 linux-arm-kernel@...ts.infradead.org, linux-acpi@...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>,
 Carl Worth <carl@...amperecomputing.com>,
 Catalin Marinas <catalin.marinas@....com>,
 D Scott Phillips <scott@...amperecomputing.com>,
 Danilo Krummrich <dakr@...nel.org>, Dave Martin <Dave.Martin@....com>,
 David Hildenbrand <david@...hat.com>, Drew Fustini <dfustini@...libre.com>,
 Fenghua Yu <fenghuay@...dia.com>, Gavin Shan <gshan@...hat.com>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Hanjun Guo <guohanjun@...wei.com>, Jamie Iles <quic_jiles@...cinc.com>,
 Jeremy Linton <jeremy.linton@....com>,
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 Peter Newman <peternewman@...gle.com>, "Rafael J. Wysocki"
 <rafael@...nel.org>, Rob Herring <robh@...nel.org>,
 Rohit Mathew <rohit.mathew@....com>,
 Shanker Donthineni <sdonthineni@...dia.com>,
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 <sudeep.holla@....com>, Wang ShaoBo <bobo.shaobowang@...wei.com>,
 Will Deacon <will@...nel.org>, Xin Hao <xhao@...ux.alibaba.com>,
 Zeng Heng <zengheng4@...wei.com>
Subject: Re: [v5 10/34] arm_mpam: Add probe/remove for mpam msc driver and
 kbuild boiler plate

>> Does anything hinder you to integrate statements like “guard(mutex)(&mpam_list_lock);” here?
>> https://elixir.bootlin.com/linux/v6.18-rc6/source/include/linux/mutex.h#L228
> 
> The mpam_list_lock needs to be dropped before the end of the scope as it
> is also taken in mpam_msc_drv_remove().

Would you eventually prefer to use scoped_guard() calls at any more source code places?
https://elixir.bootlin.com/linux/v6.18-rc6/source/include/linux/cleanup.h#L316-L319

Regards,
Markus