linux-kernel - Re: [PATCH v3 03/11] perf: provide a common perf_event_nop_0() for use with .event

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Message-ID: <53157A45.4080600@linux.vnet.ibm.com>
Date:	Mon, 03 Mar 2014 23:01:25 -0800
From:	Cody P Schafer <cody@...ux.vnet.ibm.com>
To:	Michael Ellerman <mpe@...erman.id.au>,
	Linux PPC <linuxppc-dev@...ts.ozlabs.org>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Ingo Molnar <mingo@...hat.com>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
CC:	Peter Zijlstra <peterz@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>, scottwood@...escale.com
Subject: Re: [PATCH v3 03/11] perf: provide a common perf_event_nop_0() for
 use with .event_idx

On 03/03/2014 09:19 PM, Michael Ellerman wrote:
> On Thu, 2014-27-02 at 21:04:56 UTC, Cody P Schafer wrote:
>> Rather an having every pmu that needs a function that just returns 0 for
>> .event_idx define their own copy, reuse the one in kernel/events/core.c.
>>
>> Rename from perf_swevent_event_idx() because we're no longer using it
>> for just software events. Naming is based on the perf_pmu_nop_*()
>> functions.
>
> You could just use perf_pmu_nop_int() directly.

No, .event_idx needs something that takes a (struct perf_event *), 
perf_pmu_nop_int() takes a (struct pmu *).

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