linux-kernel - Re: [PATCH v3 07/29] arm_mpam: Add probe/remove for mpam msc driver and kbuild boiler plate

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Message-ID: <63b2c31c-6759-42aa-b54b-08764d88c57a@web.de>
Date: Thu, 6 Nov 2025 18:48:10 +0100
From: Markus Elfring <Markus.Elfring@....de>
To: 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>,
 Jonathan Cameron <Jonathan.Cameron@...wei.com>, Koba Ko <kobak@...dia.com>,
 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>, 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>, Wang ShaoBo <bobo.shaobowang@...wei.com>,
 Will Deacon <will@...nel.org>, Xin Hao <xhao@...ux.alibaba.com>
Subject: Re: [PATCH v3 07/29] arm_mpam: Add probe/remove for mpam msc driver
 and kbuild boiler plate

…
> +++ b/drivers/resctrl/mpam_devices.c
> @@ -0,0 +1,190 @@
…
> +static void mpam_msc_drv_remove(struct platform_device *pdev)
> +{
…
> +	mutex_lock(&mpam_list_lock);
> +	mpam_msc_destroy(msc);
> +	mutex_unlock(&mpam_list_lock);
> +
> +	synchronize_srcu(&mpam_srcu);
> +}
…

Under which circumstances would you become interested to apply a statement
like “guard(mutex)(&mpam_list_lock);”?
https://elixir.bootlin.com/linux/v6.18-rc4/source/include/linux/mutex.h#L228

Regards,
Markus