linux-kernel - Re: [PATCH v3 26/47] arm_mpam: resctrl: Wait for cacheinfo to be ready

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Message-ID: <20260113150159.000053f7@huawei.com>
Date: Tue, 13 Jan 2026 15:01:59 +0000
From: Jonathan Cameron <jonathan.cameron@...wei.com>
To: Ben Horgan <ben.horgan@....com>
CC: <amitsinght@...vell.com>, <baisheng.gao@...soc.com>,
	<baolin.wang@...ux.alibaba.com>, <carl@...amperecomputing.com>,
	<dave.martin@....com>, <david@...nel.org>, <dfustini@...libre.com>,
	<fenghuay@...dia.com>, <gshan@...hat.com>, <james.morse@....com>,
	<kobak@...dia.com>, <lcherian@...vell.com>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
	<peternewman@...gle.com>, <punit.agrawal@....qualcomm.com>,
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	<joey.gouly@....com>, <suzuki.poulose@....com>, <kvmarm@...ts.linux.dev>
Subject: Re: [PATCH v3 26/47] arm_mpam: resctrl: Wait for cacheinfo to be
 ready

On Mon, 12 Jan 2026 16:58:53 +0000
Ben Horgan <ben.horgan@....com> wrote:

> In order to calculate the rmid realloc threshold the size of the cache
> needs to be known. Cache domains will also be named after the cache id. So
> that this information can be extracted from cacheinfo we need to wait for
> it to be ready. The cacheinfo information is populated in device_initcall()
> so we wait for that.
> 
> Signed-off-by: James Morse <james.morse@....com>
> [horgan: split out from another patch]
> Signed-off-by: Ben Horgan <ben.horgan@....com>
> ---
> This is moved into it's own patch to allow all uses of cacheinfo to be
> valid when they are introduced.

I don't mind the patch but I'm not entirely following this comment. Is
the point that previously there was a sneaky user before this was added in
the series?

Anyhow, that's not in the patch itself so
Reviewed-by: Jonathan Cameron <jonathan.cameron@...wei.com>