[PATCH bpf-next 1/2] selftests/bpf: add static to enable_all_controllers()

[Ivan Khoronzhuk <ivan.khoronzhuk@xxxxxxxxxx>]

Add static to enable_all_controllers() to get rid from annoying warn:

samples/bpf/../../tools/testing/selftests/bpf/cgroup_helpers.c:44:5:
warning: no previous prototype for ‘enable_all_controllers’
[-Wmissing-prototypes]
 int enable_all_controllers(char *cgroup_path)

while samples/bpf build.

Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@xxxxxxxxxx>
---
 tools/testing/selftests/bpf/cgroup_helpers.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/cgroup_helpers.c b/tools/testing/selftests/bpf/cgroup_helpers.c
index e95c33e333a4..4d74f3c4619b 100644
--- a/tools/testing/selftests/bpf/cgroup_helpers.c
+++ b/tools/testing/selftests/bpf/cgroup_helpers.c
@@ -41,7 +41,7 @@
  *
  * If successful, 0 is returned.
  */
-int enable_all_controllers(char *cgroup_path)
+static int enable_all_controllers(char *cgroup_path)
 {
 	char path[PATH_MAX + 1];
 	char buf[PATH_MAX];
-- 
2.17.1