Redefinition of is_signed_type() causes compilation warning for tests
which use kselftest_harness. Replace the definition with linux/overflow.h

Signed-off-by: Sagi Shahar <sagis@google.com>
---
 tools/testing/selftests/kselftest_harness.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h
index 2925e47db995..a580a0d33c65 100644
--- a/tools/testing/selftests/kselftest_harness.h
+++ b/tools/testing/selftests/kselftest_harness.h
@@ -56,6 +56,7 @@
 #include <asm/types.h>
 #include <ctype.h>
 #include <errno.h>
+#include <linux/overflow.h>
 #include <linux/unistd.h>
 #include <poll.h>
 #include <stdbool.h>
@@ -751,8 +752,6 @@
 	for (; _metadata->trigger; _metadata->trigger = \
 			__bail(_assert, _metadata))
 
-#define is_signed_type(var)       (!!(((__typeof__(var))(-1)) < (__typeof__(var))1))
-
 #define __EXPECT(_expected, _expected_str, _seen, _seen_str, _t, _assert) do { \
 	/* Avoid multiple evaluation of the cases */ \
 	__typeof__(_expected) __exp = (_expected); \
-- 
2.51.0.rc1.193.gad69d77794-goog