linux-kernel - Re: [PATCH 20/32] perf/arm-ccn: Assign parents for event

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Message-ID: <0a21a714-b1ac-9899-748a-ca46bec75283@arm.com>
Date:   Wed, 12 Apr 2023 13:09:24 +0100
From:   Suzuki K Poulose <suzuki.poulose@....com>
To:     Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Mark Rutland <mark.rutland@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Will Deacon <will@...nel.org>, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, gregkh@...uxfoundation.org
Cc:     linuxarm@...wei.com, Dan Williams <dan.j.williams@...el.com>,
        Shaokun Zhang <zhangshaokun@...ilicon.com>,
        Yicong Yang <yangyicong@...ilicon.com>,
        Jiucheng Xu <jiucheng.xu@...ogic.com>,
        Khuong Dinh <khuong@...amperecomputing.com>,
        Robert Richter <rric@...nel.org>,
        Atish Patra <atishp@...shpatra.org>,
        Anup Patel <anup@...infault.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Frank Li <Frank.li@....com>,
        Shuai Xue <xueshuai@...ux.alibaba.com>,
        Vineet Gupta <vgupta@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Dave Jiang <dave.jiang@...el.com>, Wu Hao <hao.wu@...el.com>,
        Tom Rix <trix@...hat.com>, linux-fpga@...r.kernel.org,
        Liang Kan <kan.liang@...ux.intel.com>
Subject: Re: [PATCH 20/32] perf/arm-ccn: Assign parents for event_source
 device

On 04/04/2023 14:42, Jonathan Cameron wrote:
> Currently the PMU device appears directly under /sys/devices/
> Only root busses should appear there, so instead assign the pmu->dev
> parent to be the platform device.
> 
> Link: https://lore.kernel.org/linux-cxl/ZCLI9A40PJsyqAmq@kroah.com/
> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
> ---
>   drivers/perf/arm-ccn.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/perf/arm-ccn.c b/drivers/perf/arm-ccn.c
> index 728d13d8e98a..dc8b0dcb436e 100644
> --- a/drivers/perf/arm-ccn.c
> +++ b/drivers/perf/arm-ccn.c
> @@ -1265,6 +1265,7 @@ static int arm_ccn_pmu_init(struct arm_ccn *ccn)
>   	/* Perf driver registration */
>   	ccn->dt.pmu = (struct pmu) {
>   		.module = THIS_MODULE,
> +		.parent = ccn->dev,
>   		.attr_groups = arm_ccn_pmu_attr_groups,
>   		.task_ctx_nr = perf_invalid_context,
>   		.event_init = arm_ccn_pmu_event_init,


Acked-by: Suzuki K Poulose <suzuki.poulose@....com>