[v4,04/17] perf ftrace: factor out function write_tracing_file_int()
diff mbox series

Message ID 20200710134322.15400-5-changbin.du@gmail.com
State New
Headers show
Series
  • perf: ftrace enhancement
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Commit Message

Changbin Du July 10, 2020, 1:43 p.m. UTC
We will reuse this function later.

Signed-off-by: Changbin Du <changbin.du@gmail.com>
---
 tools/perf/builtin-ftrace.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

Patch
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diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c
index 1188b82c6541..342861a1d152 100644
--- a/tools/perf/builtin-ftrace.c
+++ b/tools/perf/builtin-ftrace.c
@@ -165,6 +165,17 @@  static int read_tracing_file_to_stdout(const char *name)
 	return ret;
 }
 
+static int write_tracing_file_int(const char *name, int value)
+{
+	char buf[16];
+
+	snprintf(buf, sizeof(buf), "%d", value);
+	if (write_tracing_file(name, buf) < 0)
+		return -1;
+
+	return 0;
+}
+
 static int reset_tracing_cpu(void);
 static void reset_tracing_filters(void);
 
@@ -295,8 +306,6 @@  static void reset_tracing_filters(void)
 
 static int set_tracing_depth(struct perf_ftrace *ftrace)
 {
-	char buf[16];
-
 	if (ftrace->graph_depth == 0)
 		return 0;
 
@@ -305,9 +314,7 @@  static int set_tracing_depth(struct perf_ftrace *ftrace)
 		return -1;
 	}
 
-	snprintf(buf, sizeof(buf), "%d", ftrace->graph_depth);
-
-	if (write_tracing_file("max_graph_depth", buf) < 0)
+	if (write_tracing_file_int("max_graph_depth", ftrace->graph_depth) < 0)
 		return -1;
 
 	return 0;