linux-kernel - [tip:perf/core] perf intel-pt: Tidy Intel PT evsel lookup into separate function

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Date:   Sat, 1 Jul 2017 01:53:32 -0700
From:   tip-bot for Adrian Hunter <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     tglx@...utronix.de, acme@...hat.com, mingo@...nel.org,
        adrian.hunter@...el.com, hpa@...or.com,
        linux-kernel@...r.kernel.org, ak@...ux.intel.com
Subject: [tip:perf/core] perf intel-pt: Tidy Intel PT evsel lookup into
 separate function

Commit-ID:  85a564d26dfb45bbf0c0095e0fcee3bdc4a49a85
Gitweb:     http://git.kernel.org/tip/85a564d26dfb45bbf0c0095e0fcee3bdc4a49a85
Author:     Adrian Hunter <adrian.hunter@...el.com>
AuthorDate: Fri, 26 May 2017 11:17:30 +0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Fri, 30 Jun 2017 11:44:35 -0300

perf intel-pt: Tidy Intel PT evsel lookup into separate function

Tidy the lookup of the Intel PT selected event (perf_evsel) into a separate
function.

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
Cc: Andi Kleen <ak@...ux.intel.com>
Link: http://lkml.kernel.org/r/1495786658-18063-30-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/intel-pt.c | 25 +++++++++++++++----------
 1 file changed, 15 insertions(+), 10 deletions(-)

diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c
index b670502..a9486b5 100644
--- a/tools/perf/util/intel-pt.c
+++ b/tools/perf/util/intel-pt.c
@@ -1922,24 +1922,29 @@ static int intel_pt_synth_event(struct perf_session *session,
 					   &id, intel_pt_event_synth);
 }
 
+static struct perf_evsel *intel_pt_evsel(struct intel_pt *pt,
+					 struct perf_evlist *evlist)
+{
+	struct perf_evsel *evsel;
+
+	evlist__for_each_entry(evlist, evsel) {
+		if (evsel->attr.type == pt->pmu_type && evsel->ids)
+			return evsel;
+	}
+
+	return NULL;
+}
+
 static int intel_pt_synth_events(struct intel_pt *pt,
 				 struct perf_session *session)
 {
 	struct perf_evlist *evlist = session->evlist;
-	struct perf_evsel *evsel;
+	struct perf_evsel *evsel = intel_pt_evsel(pt, evlist);
 	struct perf_event_attr attr;
-	bool found = false;
 	u64 id;
 	int err;
 
-	evlist__for_each_entry(evlist, evsel) {
-		if (evsel->attr.type == pt->pmu_type && evsel->ids) {
-			found = true;
-			break;
-		}
-	}
-
-	if (!found) {
+	if (!evsel) {
 		pr_debug("There are no selected events with Intel Processor Trace data\n");
 		return 0;
 	}