From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1765323AbdAKPQ7 (ORCPT ); Wed, 11 Jan 2017 10:16:59 -0500 Received: from mail-pf0-f196.google.com ([209.85.192.196]:33183 "EHLO mail-pf0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1765288AbdAKPQ4 (ORCPT ); Wed, 11 Jan 2017 10:16:56 -0500 From: Stafford Horne To: Shuah Khan , Darren Hart Cc: Bamvor Jian Zhang , linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Stafford Horne , Prarit Bhargava Subject: [PATCH v2 4/6] selftests/intel_pstate: Fix warning on loop index overflow Date: Thu, 12 Jan 2017 00:16:05 +0900 Message-Id: <6813bc1a6080d3a82900baf4516da59995dfe6ff.1484147115.git.shorne@gmail.com> X-Mailer: git-send-email 2.9.3 In-Reply-To: <9f3d11fc1f75e2589aee67cbafac6ead3adf0f23.1484147115.git.shorne@gmail.com> References: <9f3d11fc1f75e2589aee67cbafac6ead3adf0f23.1484147115.git.shorne@gmail.com> In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The build was showing the warning: aperf.c:60:27: warning: iteration 2147483647 invokes undefined behavior [-Waggressive-loop-optimizations] for (i=0; i<0x8fffffff; i++) { This change sets i, cpu and fd to unsigned int as they should not need to be signed. Cc: Prarit Bhargava Signed-off-by: Stafford Horne --- tools/testing/selftests/intel_pstate/aperf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/intel_pstate/aperf.c b/tools/testing/selftests/intel_pstate/aperf.c index 6046e18..cd72f3d 100644 --- a/tools/testing/selftests/intel_pstate/aperf.c +++ b/tools/testing/selftests/intel_pstate/aperf.c @@ -14,7 +14,7 @@ void usage(char *name) { } int main(int argc, char **argv) { - int i, cpu, fd; + unsigned int i, cpu, fd; char msr_file_name[64]; long long tsc, old_tsc, new_tsc; long long aperf, old_aperf, new_aperf; -- 2.9.3