test_futex_mpol() is not called, resulting in the following build warning.

futex_numa_mpol.c:134:13: warning: ‘test_futex_mpol’ defined but not used

Disable the function but keep it in case it was supposed to be used.

Fixes: d35ca2f64272 ("selftests/futex: Refactor futex_numa_mpol with kselftest_harness.h")
Cc: André Almeida <andrealmeid@igalia.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
v2: Update subject and description to reflect that the patch fixes a build
    warning. 

 tools/testing/selftests/futex/functional/futex_numa_mpol.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/testing/selftests/futex/functional/futex_numa_mpol.c b/tools/testing/selftests/futex/functional/futex_numa_mpol.c
index d037a3f10ee8..8e3d17d66684 100644
--- a/tools/testing/selftests/futex/functional/futex_numa_mpol.c
+++ b/tools/testing/selftests/futex/functional/futex_numa_mpol.c
@@ -131,10 +131,12 @@ static void test_futex(void *futex_ptr, int err_value)
 	__test_futex(futex_ptr, err_value, FUTEX2_SIZE_U32 | FUTEX_PRIVATE_FLAG | FUTEX2_NUMA);
 }
 
+#ifdef NOTUSED
 static void test_futex_mpol(void *futex_ptr, int err_value)
 {
 	__test_futex(futex_ptr, err_value, FUTEX2_SIZE_U32 | FUTEX_PRIVATE_FLAG | FUTEX2_NUMA | FUTEX2_MPOL);
 }
+#endif
 
 TEST(futex_numa_mpol)
 {
-- 
2.45.2