linux-kernel - [PATCH 1/1] perf tool: add hists_

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Message-Id: <1414004561-22096-1-git-send-email-kan.liang@intel.com>
Date:	Wed, 22 Oct 2014 15:02:41 -0400
From:	kan.liang@...el.com
To:	acme@...nel.org
Cc:	linux-kernel@...r.kernel.org, Kan Liang <kan.liang@...el.com>
Subject: [PATCH 1/1] perf tool: add hists__init for perf diff

From: Kan Liang <kan.liang@...el.com>

perf diff also uses hists/hist_entries, hists__init() should be called
before creating any evsels.

Signed-off-by: Kan Liang <kan.liang@...el.com>
---
 tools/perf/builtin-diff.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index 8c5c11c..25114c9 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -1142,6 +1142,11 @@ static int data_init(int argc, const char **argv)
 
 int cmd_diff(int argc, const char **argv, const char *prefix __maybe_unused)
 {
+	int ret = hists__init();
+
+	if (ret < 0)
+		return ret;
+
 	perf_config(perf_default_config, NULL);
 
 	argc = parse_options(argc, argv, options, diff_usage, 0);
-- 
1.8.3.2

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