From: Frederic Weisbecker <fweisbec@gmail.com>
To: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@elte.hu>, LKML <linux-kernel@vger.kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
"K.Prasad" <prasad@linux.vnet.ibm.com>,
Alan Stern <stern@rowland.harvard.edu>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Steven Rostedt <rostedt@goodmis.org>,
Mike Galbraith <efault@gmx.de>, Paul Mundt <lethal@linux-sh.org>
Subject: Re: [PATCH 3/6] perf/core: Add a callback to perf events
Date: Mon, 2 Nov 2009 14:01:51 +0100 [thread overview]
Message-ID: <20091102130147.GB4878@nowhere> (raw)
In-Reply-To: <19182.22220.389174.916544@cargo.ozlabs.ibm.com>
On Mon, Nov 02, 2009 at 02:49:32PM +1100, Paul Mackerras wrote:
> Frederic Weisbecker writes:
>
> > @@ -4335,6 +4336,15 @@ perf_event_alloc(struct perf_event_attr *attr,
> >
> > event->state = PERF_EVENT_STATE_INACTIVE;
> >
> > + if (!callback) {
> > + if (parent_event)
> > + event->callback = parent_event->callback;
> > + else
> > + event->callback = NULL;
> > + } else {
> > + event->callback = callback;
> > + }
>
> Wouldn't this be simpler and clearer as:
>
> if (!callback && parent_event)
> callback = parent_event->callback;
> event->callback = callback;
>
> ?
>
> Paul.
Yep, I'm going to change that.
Thanks.
next prev parent reply other threads:[~2009-11-02 13:01 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-24 14:16 [GIT PULL v2] hw-breakpoints: Rewrite on top of perf events Frederic Weisbecker
2009-10-24 14:16 ` [PATCH 1/6] perf/core: Provide a kernel-internal interface to get to performance counters Frederic Weisbecker
2009-10-24 14:16 ` [PATCH 2/6] x86/hw-breakpoints: Actually flush thread breakpoints in flush_thread() Frederic Weisbecker
2009-10-24 14:16 ` [PATCH 3/6] perf/core: Add a callback to perf events Frederic Weisbecker
2009-10-24 14:16 ` [PATCH 4/6] hw-breakpoints: Rewrite the hw-breakpoints layer on top of " Frederic Weisbecker
2009-10-24 16:19 ` Jan Kiszka
2009-10-25 23:31 ` Frederic Weisbecker
2009-10-26 8:17 ` Jan Kiszka
2009-11-01 21:09 ` [GIT PULL v3] hw-breakpoints: Rewrite " Frederic Weisbecker
2009-11-01 21:09 ` [PATCH 1/6] perf/core: Provide a kernel-internal interface to get to performance counters Frederic Weisbecker
2009-11-02 3:46 ` Paul Mackerras
2009-11-02 5:38 ` Arjan van de Ven
2009-11-02 10:47 ` Paul Mackerras
2009-11-02 13:00 ` Frederic Weisbecker
2009-11-01 21:09 ` [PATCH 2/6] x86/hw-breakpoints: Actually flush thread breakpoints in flush_thread() Frederic Weisbecker
2009-11-01 21:09 ` [PATCH 3/6] perf/core: Add a callback to perf events Frederic Weisbecker
2009-11-02 3:49 ` Paul Mackerras
2009-11-02 13:01 ` Frederic Weisbecker [this message]
2009-11-01 21:09 ` [PATCH 4/6] hw-breakpoints: Rewrite the hw-breakpoints layer on top of " Frederic Weisbecker
2009-11-01 22:09 ` Jan Kiszka
2009-11-01 22:49 ` Frederic Weisbecker
2009-11-01 23:37 ` Frederic Weisbecker
2009-11-02 7:45 ` Jan Kiszka
2009-11-02 13:04 ` Frederic Weisbecker
2009-11-01 21:09 ` [PATCH 5/6] hw-breakpoints: Arbitrate access to pmu following registers constraints Frederic Weisbecker
2009-11-01 21:09 ` [PATCH 6/6] ksym_tracer: Remove KSYM_SELFTEST_ENTRY Frederic Weisbecker
2009-10-24 14:16 ` [PATCH 5/6] hw-breakpoints: Arbitrate access to pmu following registers constraints Frederic Weisbecker
2009-10-24 14:16 ` [PATCH 6/6] ksym_tracer: Remove KSYM_SELFTEST_ENTRY Frederic Weisbecker
2009-10-24 14:19 ` [GIT PULL v2] hw-breakpoints: Rewrite on top of perf events Frederic Weisbecker
2009-10-26 21:31 ` K.Prasad
2009-10-29 19:07 ` Frederic Weisbecker
2009-11-02 6:25 ` K.Prasad
2009-11-02 14:07 ` Frederic Weisbecker
2009-11-04 14:14 ` K.Prasad
2009-11-05 11:02 ` Frederic Weisbecker
-- strict thread matches above, loose matches on Subject: below --
2009-11-03 19:11 [GIT PULL v4] hw-breakpoints: Rewrite on top of perf events v4 Frederic Weisbecker
2009-11-03 19:11 ` [PATCH 3/6] perf/core: Add a callback to perf events Frederic Weisbecker
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