linux-kernel - Re: [PATCH v6 0/6] Add HiSilicon SoC uncore Performance Monitoring Unit driver

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Message-ID: <6a6e7f31-15d1-9c87-59f4-f8feb9703e18@hisilicon.com>
Date:   Fri, 20 Oct 2017 09:56:48 +0800
From:   Zhangshaokun <zhangshaokun@...ilicon.com>
To:     Mark Rutland <mark.rutland@....com>,
        Will Deacon <will.deacon@....com>
CC:     <jonathan.cameron@...wei.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-doc@...r.kernel.org>,
        <linuxarm@...wei.com>
Subject: Re: [PATCH v6 0/6] Add HiSilicon SoC uncore Performance Monitoring
 Unit driver

Hi Mark/Will,

Thanks.

On 2017/10/19 23:32, Mark Rutland wrote:
> On Thu, Oct 19, 2017 at 04:28:35PM +0100, Will Deacon wrote:
>> On Thu, Oct 19, 2017 at 01:29:18PM +0100, Mark Rutland wrote:
>>> Will, are you happy to queue this?
>>>
>>> There's a minor fixup [1] needed in patch 2, but otherwise this looks
>>> good to me, and builds cleanly.
>>>
>>> I've pushed out a branch [2] with that fix folded in, in case that's
>>> easier for you. Otherwise, feel free to pick these up with my Ack.
>>
>> I'm just running some build tests on these. I also tweaked your fix slightly
>> -- can you check the diff below please?
> 
> That's nicer!
> 
> My ack stands with that folded in.
> 
> Mark.
> 
>> diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.c b/drivers/perf/hisilicon/hisi_uncore_pmu.c
>> index 2bff43f0736b..c74542af4acf 100644
>> --- a/drivers/perf/hisilicon/hisi_uncore_pmu.c
>> +++ b/drivers/perf/hisilicon/hisi_uncore_pmu.c
>> @@ -69,15 +69,18 @@ static bool hisi_validate_event_group(struct perf_event *event)
>>  	/* Include count for the event */
>>  	int counters = 1;
>>  
>> -	/*
>> -	 * We must NOT create groups containing mixed PMUs, although
>> -	 * software events are acceptable
>> -	 */
>> -	if (leader->pmu != event->pmu && !is_software_event(leader))
>> -		return false;
>> +	if (!is_software_event(leader)) {
>> +		/*
>> +		 * We must NOT create groups containing mixed PMUs, although
>> +		 * software events are acceptable
>> +		 */
>> +		if (leader->pmu != event->pmu)
>> +			return false;
>>  
>> -	/* Increment counter for the leader */
>> -	counters++;
>> +		/* Increment counter for the leader */
>> +		if (leader != event)
>> +			counters++;
>> +	}
>>  
>>  	list_for_each_entry(sibling, &event->group_leader->sibling_list,
>>  			    group_entry) {
> 
> .
>