linux-kernel - [PATCH 9/9] perf util: Cleanup calc_data

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Date:	Thu, 21 Mar 2013 16:18:52 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung.kim@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: [PATCH 9/9] perf util: Cleanup calc_data_size logic

From: Namhyung Kim <namhyung.kim@....com>

It's for calculating whole trace data size during reading.  However
relation functions are called only in this file, no need to
conditionalize it with tricky +1 offset and rename the variable to
more meaningful name like trace_data_size.

Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/util/trace-event-read.c | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/tools/perf/util/trace-event-read.c b/tools/perf/util/trace-event-read.c
index 5ca6c2cc4216..5b794f773cd0 100644
--- a/tools/perf/util/trace-event-read.c
+++ b/tools/perf/util/trace-event-read.c
@@ -45,7 +45,7 @@ int file_bigendian;
 int host_bigendian;
 static int long_size;
 
-static ssize_t calc_data_size;
+static ssize_t trace_data_size;
 static bool repipe;
 
 static int __do_read(int fd, void *buf, int size)
@@ -85,8 +85,7 @@ static int do_read(void *data, int size)
 		return -1;
 	}
 
-	if (calc_data_size)
-		calc_data_size += r;
+	trace_data_size += r;
 
 	return r;
 }
@@ -157,8 +156,7 @@ static char *read_string(void)
 			break;
 	}
 
-	if (calc_data_size)
-		calc_data_size += size;
+	trace_data_size += size;
 
 	str = malloc(size);
 	if (str)
@@ -358,9 +356,7 @@ ssize_t trace_report(int fd, struct pevent **ppevent, bool __repipe)
 
 	*ppevent = NULL;
 
-	calc_data_size = 1;
 	repipe = __repipe;
-
 	input_fd = fd;
 
 	if (do_read(buf, 3) < 0)
@@ -419,8 +415,7 @@ ssize_t trace_report(int fd, struct pevent **ppevent, bool __repipe)
 	if (err)
 		goto out;
 
-	size = calc_data_size - 1;
-	calc_data_size = 0;
+	size = trace_data_size;
 	repipe = false;
 
 	if (show_funcs) {
-- 
1.7.11.7

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