linux-kernel - [PATCH 30/43] perf cs-etm: Cleaning up function cs_etm__alloc

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 14 Feb 2019 21:45:26 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     Jiri Olsa <jolsa@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
        Clark Williams <williams@...hat.com>,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Jiri Olsa <jolsa@...hat.com>, Leo Yan <leo.yan@...aro.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Suzuki K Poulouse <suzuki.poulose@....com>,
        linux-arm-kernel@...ts.infradead.org,
        Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 30/43] perf cs-etm: Cleaning up function cs_etm__alloc_queue()

From: Mathieu Poirier <mathieu.poirier@...aro.org>

Function cs_etm__alloc_queue() should only be concerned with the allocation
of memory for the etmq and accompanying decoder.  Everything else should
be done in the calling function.

Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Leo Yan <leo.yan@...aro.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Suzuki K Poulouse <suzuki.poulose@....com>
Cc: linux-arm-kernel@...ts.infradead.org
Link: http://lkml.kernel.org/r/20190212171618.25355-9-mathieu.poirier@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/cs-etm.c | 37 ++++++++++++++++---------------------
 1 file changed, 16 insertions(+), 21 deletions(-)

diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
index 4cc9fce97a86..c9a5b4935209 100644
--- a/tools/perf/util/cs-etm.c
+++ b/tools/perf/util/cs-etm.c
@@ -405,8 +405,7 @@ static u32 cs_etm__mem_access(struct cs_etm_queue *etmq, u64 address,
 	return len;
 }
 
-static struct cs_etm_queue *cs_etm__alloc_queue(struct cs_etm_auxtrace *etm,
-						unsigned int queue_nr)
+static struct cs_etm_queue *cs_etm__alloc_queue(struct cs_etm_auxtrace *etm)
 {
 	struct cs_etm_decoder_params d_params;
 	struct cs_etm_trace_params  *t_params = NULL;
@@ -444,12 +443,6 @@ static struct cs_etm_queue *cs_etm__alloc_queue(struct cs_etm_auxtrace *etm,
 	if (!etmq->event_buf)
 		goto out_free;
 
-	etmq->etm = etm;
-	etmq->queue_nr = queue_nr;
-	etmq->pid = -1;
-	etmq->tid = -1;
-	etmq->cpu = -1;
-
 	/* Use metadata to fill in trace parameters for trace decoder */
 	t_params = zalloc(sizeof(*t_params) * etm->num_cpu);
 
@@ -479,10 +472,6 @@ static struct cs_etm_queue *cs_etm__alloc_queue(struct cs_etm_auxtrace *etm,
 		goto out_free_decoder;
 
 	zfree(&t_params);
-
-	etmq->offset = 0;
-	etmq->period_instructions = 0;
-
 	return etmq;
 
 out_free_decoder:
@@ -503,24 +492,30 @@ static int cs_etm__setup_queue(struct cs_etm_auxtrace *etm,
 			       struct auxtrace_queue *queue,
 			       unsigned int queue_nr)
 {
+	int ret = 0;
 	struct cs_etm_queue *etmq = queue->priv;
 
 	if (list_empty(&queue->head) || etmq)
-		return 0;
+		goto out;
 
-	etmq = cs_etm__alloc_queue(etm, queue_nr);
+	etmq = cs_etm__alloc_queue(etm);
 
-	if (!etmq)
-		return -ENOMEM;
+	if (!etmq) {
+		ret = -ENOMEM;
+		goto out;
+	}
 
 	queue->priv = etmq;
-
-	if (queue->cpu != -1)
-		etmq->cpu = queue->cpu;
-
+	etmq->etm = etm;
+	etmq->queue_nr = queue_nr;
+	etmq->cpu = queue->cpu;
 	etmq->tid = queue->tid;
+	etmq->pid = -1;
+	etmq->offset = 0;
+	etmq->period_instructions = 0;
 
-	return 0;
+out:
+	return ret;
 }
 
 static int cs_etm__setup_queues(struct cs_etm_auxtrace *etm)
-- 
2.19.1