linux-kernel - [tip:perf/core] perf map: Use zalloc for map

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Message-ID: <tip-ab6cd0e5276e24403751e0b3b8ed807738a8571f@git.kernel.org>
Date:   Fri, 16 Aug 2019 13:59:36 -0700
From:   tip-bot for John Keeping <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     tglx@...utronix.de, peterz@...radead.org, hpa@...or.com,
        jolsa@...nel.org, alexander.shishkin@...ux.intel.com,
        linux-kernel@...r.kernel.org, namhyung@...nel.org,
        mingo@...nel.org, khlebnikov@...dex-team.ru, john@...anate.com,
        acme@...hat.com
Subject: [tip:perf/core] perf map: Use zalloc for map_groups

Commit-ID:  ab6cd0e5276e24403751e0b3b8ed807738a8571f
Gitweb:     https://git.kernel.org/tip/ab6cd0e5276e24403751e0b3b8ed807738a8571f
Author:     John Keeping <john@...anate.com>
AuthorDate: Thu, 15 Aug 2019 11:01:44 +0100
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Fri, 16 Aug 2019 12:25:23 -0300

perf map: Use zalloc for map_groups

In the next commit we will add new fields to map_groups and we need
these to be null if no value is assigned.  The simplest way to achieve
this is to request zeroed memory from the allocator.

Signed-off-by: John Keeping <john@...anate.com>
Reviewed-by: Jiri Olsa <jolsa@...nel.org>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: john keeping <john@...anate.com>
Link: http://lkml.kernel.org/r/20190815100146.28842-1-john@metanate.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/map.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index 668410b1d426..44b556812e4b 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -636,7 +636,7 @@ bool map_groups__empty(struct map_groups *mg)
 
 struct map_groups *map_groups__new(struct machine *machine)
 {
-	struct map_groups *mg = malloc(sizeof(*mg));
+	struct map_groups *mg = zalloc(sizeof(*mg));
 
 	if (mg != NULL)
 		map_groups__init(mg, machine);