linux-kernel - [PATCH v3 8/9] perf mem: Return NULL for event 'ldst' on PowerPC

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Date:   Wed, 28 Oct 2020 14:38:12 +0800
From:   Leo Yan <leo.yan@...aro.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        John Garry <john.garry@...wei.com>,
        Will Deacon <will@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Kemeng Shi <shikemeng@...wei.com>,
        "Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
        Ian Rogers <irogers@...gle.com>, Al Grant <Al.Grant@....com>,
        James Clark <james.clark@....com>,
        Wei Li <liwei391@...wei.com>,
        André Przywara <andre.przywara@....com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Cc:     Leo Yan <leo.yan@...aro.org>
Subject: [PATCH v3 8/9] perf mem: Return NULL for event 'ldst' on PowerPC

If user specifies event type "ldst", PowerPC's perf_mem_events__name()
will wrongly return the store event name "cpu/mem-stores/".

This patch changes to return NULL for the event "ldst" on PowerPC.

Signed-off-by: Leo Yan <leo.yan@...aro.org>
---
 tools/perf/arch/powerpc/util/mem-events.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/perf/arch/powerpc/util/mem-events.c b/tools/perf/arch/powerpc/util/mem-events.c
index 07fb5e049488..90c5a0760685 100644
--- a/tools/perf/arch/powerpc/util/mem-events.c
+++ b/tools/perf/arch/powerpc/util/mem-events.c
@@ -7,6 +7,8 @@ char *perf_mem_events__name(int i)
 {
 	if (i == PERF_MEM_EVENTS__LOAD)
 		return (char *) "cpu/mem-loads/";
-
-	return (char *) "cpu/mem-stores/";
+	else if (i == PERF_MEM_EVENTS__STORE)
+		return (char *) "cpu/mem-stores/";
+	else
+		return NULL;
 }
-- 
2.17.1