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Message-ID: <54EAD6DF.1000709@intel.com>
Date: Mon, 23 Feb 2015 09:29:35 +0200
From: Adrian Hunter <adrian.hunter@intel.com>
Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki,
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To: David Ahern <dsahern@gmail.com>
CC: Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        linux-kernel@vger.kernel.org, Frederic Weisbecker <fweisbec@gmail.com>,
        Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@gmail.com>,
        Paul Mackerras <paulus@samba.org>,
        Stephane Eranian <eranian@google.com>,
        John Stultz <john.stultz@linaro.org>,
        Thomas Gleixner <tglx@linutronix.de>, Pawel Moll <pawel.moll@arm.com>,
        Steven Rostedt <rostedt@goodmis.org>, Andi Kleen <ak@linux.intel.com>,
        Mathieu Poirier <mathieu.poirier@linaro.org>
Subject: Re: [PATCH V2 1/2] perf: Sample additional clock value
References: <1424436249-3572-1-git-send-email-adrian.hunter@intel.com> <1424436249-3572-2-git-send-email-adrian.hunter@intel.com> <54E769A4.2090502@gmail.com>
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On 20/02/15 19:06, David Ahern wrote:
> On 2/20/15 5:44 AM, Adrian Hunter wrote:
>> diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
>> index efe2d2d..9385140 100644
>> --- a/include/linux/perf_event.h
>> +++ b/include/linux/perf_event.h
>> @@ -655,7 +655,7 @@ extern void perf_pmu_migrate_context(struct pmu *pmu,
>>                   int src_cpu, int dst_cpu);
>>   extern u64 perf_event_read_value(struct perf_event *event,
>>                    u64 *enabled, u64 *running);
>> -
>> +u64 perf_sample_clock_pt(void);
> 
> Core functions should not be arch specific. PT == x86.

Actually it was one of the ARM guys that asked for it to be called
"Processor Trace". It was "arch" in V1.

	http://marc.info/?l=linux-kernel&m=142436891806015

But it has been superseded completely by patches from Peter, so it
is not going further anyway.