linux-kernel - [tip:perf/urgent] perf mmap: Cleanup perf_mmap_

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Message-ID: <tip-f92c8cbe597a5a2ccec702dff824f3fe0f3623eb@git.kernel.org>
Date:   Fri, 16 Feb 2018 01:35:22 -0800
From:   tip-bot for Kan Liang <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     peterz@...radead.org, mingo@...nel.org, kan.liang@...el.com,
        linux-kernel@...r.kernel.org, yao.jin@...ux.intel.com,
        ak@...ux.intel.com, jolsa@...nel.org, hpa@...or.com,
        wangnan0@...wei.com, acme@...hat.com, namhyung@...nel.org,
        tglx@...utronix.de
Subject: [tip:perf/urgent] perf mmap: Cleanup perf_mmap__push()

Commit-ID:  f92c8cbe597a5a2ccec702dff824f3fe0f3623eb
Gitweb:     https://git.kernel.org/tip/f92c8cbe597a5a2ccec702dff824f3fe0f3623eb
Author:     Kan Liang <kan.liang@...el.com>
AuthorDate: Thu, 18 Jan 2018 13:26:18 -0800
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Thu, 15 Feb 2018 09:52:05 -0300

perf mmap: Cleanup perf_mmap__push()

The first assignment for 'start' and 'end' is redundant.

Signed-off-by: Kan Liang <kan.liang@...el.com>
Acked-by: Jiri Olsa <jolsa@...nel.org>
Cc: Andi Kleen <ak@...ux.intel.com>
Cc: Jin Yao <yao.jin@...ux.intel.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Wang Nan <wangnan0@...wei.com>
Link: http://lkml.kernel.org/r/1516310792-208685-4-git-send-email-kan.liang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/mmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index 97cf4fa..fbbbe87 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -272,7 +272,7 @@ int perf_mmap__push(struct perf_mmap *md, bool overwrite,
 {
 	u64 head = perf_mmap__read_head(md);
 	u64 old = md->prev;
-	u64 end = head, start = old;
+	u64 end, start;
 	unsigned char *data = md->base + page_size;
 	unsigned long size;
 	void *buf;