linux-kernel - [PATCH 1/4] perf trace: Use zalloc to save initialization of syscall

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Date:   Thu, 8 Sep 2022 10:11:38 +0800
From:   Shang XiaoJing <shangxiaojing@...wei.com>
To:     <peterz@...radead.org>, <mingo@...hat.com>, <acme@...nel.org>,
        <mark.rutland@....com>, <alexander.shishkin@...ux.intel.com>,
        <jolsa@...nel.org>, <namhyung@...nel.org>,
        <linux-perf-users@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <shangxiaojing@...wei.com>
Subject: [PATCH 1/4] perf trace: Use zalloc to save initialization of syscall_stats

As most members of syscall_stats is set to 0 in thread__update_stats,
using zalloc directly.

Signed-off-by: Shang XiaoJing <shangxiaojing@...wei.com>
---
 tools/perf/builtin-trace.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 0bd9d01c0df9..3ecc31375f90 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -2173,13 +2173,10 @@ static void thread__update_stats(struct thread *thread, struct thread_trace *ttr
 
 	stats = inode->priv;
 	if (stats == NULL) {
-		stats = malloc(sizeof(*stats));
+		stats = zalloc(sizeof(*stats));
 		if (stats == NULL)
 			return;
 
-		stats->nr_failures = 0;
-		stats->max_errno   = 0;
-		stats->errnos	   = NULL;
 		init_stats(&stats->stats);
 		inode->priv = stats;
 	}
-- 
2.17.1