netdev - [PATCH net 1/4] selftests/net: rxtimestamp: fix clang issues for target arch PowerPC

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Message-Id: <20200727162531.4089654-2-tannerlove.kernel@gmail.com>
Date:   Mon, 27 Jul 2020 12:25:28 -0400
From:   Tanner Love <tannerlove.kernel@...il.com>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, Tanner Love <tannerlove@...gle.com>,
        Willem de Bruijn <willemb@...gle.com>
Subject: [PATCH net 1/4] selftests/net: rxtimestamp: fix clang issues for target arch PowerPC

From: Tanner Love <tannerlove@...gle.com>

The signedness of char is implementation-dependent. Some systems
(including PowerPC and ARM) use unsigned char. Clang 9 threw:
warning: result of comparison of constant -1 with expression of type \
'char' is always true [-Wtautological-constant-out-of-range-compare]
                                  &arg_index)) != -1) {

Tested: make -C tools/testing/selftests TARGETS="net" run_tests

Fixes: 16e781224198 ("selftests/net: Add a test to validate behavior of rx timestamps")
Signed-off-by: Tanner Love <tannerlove@...gle.com>
Acked-by: Willem de Bruijn <willemb@...gle.com>
---
 tools/testing/selftests/net/rxtimestamp.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/tools/testing/selftests/net/rxtimestamp.c b/tools/testing/selftests/net/rxtimestamp.c
index 422e7761254d..bcb79ba1f214 100644
--- a/tools/testing/selftests/net/rxtimestamp.c
+++ b/tools/testing/selftests/net/rxtimestamp.c
@@ -329,8 +329,7 @@ int main(int argc, char **argv)
 	bool all_tests = true;
 	int arg_index = 0;
 	int failures = 0;
-	int s, t;
-	char opt;
+	int s, t, opt;
 
 	while ((opt = getopt_long(argc, argv, "", long_options,
 				  &arg_index)) != -1) {
-- 
2.28.0.rc0.142.g3c755180ce-goog