From: Leo Yan <leo.yan@linaro.org>
To: Arnaldo Carvalho de Melo <acme@kernel.org>,
Mathieu Poirier <mathieu.poirier@linaro.org>,
Robert Walker <robert.walker@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Mike Leach <mike.leach@linaro.org>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Cc: Leo Yan <leo.yan@linaro.org>
Subject: [PATCH v1 2/2] perf cs-etm: Don't check cs_etm_queue::prev_packet validity
Date: Sun, 28 Apr 2019 16:32:28 +0800
Message-ID: <20190428083228.20246-2-leo.yan@linaro.org> (raw)
In-Reply-To: <20190428083228.20246-1-leo.yan@linaro.org>
Since cs_etm_queue::prev_packet is allocated for all cases, it will
never be NULL pointer; now validity checking prev_packet is pointless,
remove all of them.
Signed-off-by: Leo Yan <leo.yan@linaro.org>
---
tools/perf/util/cs-etm.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
index 054b480aab04..de488b43f440 100644
--- a/tools/perf/util/cs-etm.c
+++ b/tools/perf/util/cs-etm.c
@@ -979,7 +979,6 @@ static int cs_etm__sample(struct cs_etm_queue *etmq)
* PREV_PACKET is a branch.
*/
if (etm->synth_opts.last_branch &&
- etmq->prev_packet &&
etmq->prev_packet->sample_type == CS_ETM_RANGE &&
etmq->prev_packet->last_instr_taken_branch)
cs_etm__update_last_branch_rb(etmq);
@@ -1012,7 +1011,7 @@ static int cs_etm__sample(struct cs_etm_queue *etmq)
etmq->period_instructions = instrs_over;
}
- if (etm->sample_branches && etmq->prev_packet) {
+ if (etm->sample_branches) {
bool generate_sample = false;
/* Generate sample for tracing on packet */
@@ -1069,9 +1068,6 @@ static int cs_etm__flush(struct cs_etm_queue *etmq)
struct cs_etm_auxtrace *etm = etmq->etm;
struct cs_etm_packet *tmp;
- if (!etmq->prev_packet)
- return 0;
-
/* Handle start tracing packet */
if (etmq->prev_packet->sample_type == CS_ETM_EMPTY)
goto swap_packet;
--
2.17.1
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Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-28 8:32 [PATCH v1 1/2] perf cs-etm: Always allocate memory for cs_etm_queue::prev_packet Leo Yan
2019-04-28 8:32 ` Leo Yan [this message]
2019-04-29 14:53 ` [PATCH v1 2/2] perf cs-etm: Don't check cs_etm_queue::prev_packet validity Robert Walker
2019-04-29 14:53 ` [PATCH v1 1/2] perf cs-etm: Always allocate memory for cs_etm_queue::prev_packet Robert Walker
2019-04-30 1:07 ` Arnaldo Carvalho de Melo
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