linux-kernel - Re: [PATCH 08/32] perf/arm_cspmu: Assign parents for event

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Date:   Tue, 4 Apr 2023 15:50:51 +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 08/32] perf/arm_cspmu: Assign parents for event_source
 devices

On 04/04/2023 14:42, Jonathan Cameron wrote:
> Currently all these devices appear directly under /sys/devices/
> Only root busses should appear there, so instead assign the pmu->dev
> parents 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_cspmu/arm_cspmu.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/perf/arm_cspmu/arm_cspmu.c b/drivers/perf/arm_cspmu/arm_cspmu.c
> index e31302ab7e37..4390e4fb1e95 100644
> --- a/drivers/perf/arm_cspmu/arm_cspmu.c
> +++ b/drivers/perf/arm_cspmu/arm_cspmu.c
> @@ -1155,6 +1155,7 @@ static int arm_cspmu_register_pmu(struct arm_cspmu *cspmu)
>   	cspmu->pmu = (struct pmu){
>   		.task_ctx_nr	= perf_invalid_context,
>   		.module		= THIS_MODULE,
> +		.parent		= cspmu->dev,
>   		.pmu_enable	= arm_cspmu_enable,
>   		.pmu_disable	= arm_cspmu_disable,
>   		.event_init	= arm_cspmu_event_init,

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