[PATCH v4 04/17] perf ftrace: factor out function write_tracing_file_int()

[Changbin Du]

We will reuse this function later.

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

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;
-- 
2.25.1