From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 456BCC4332F for ; Fri, 14 Oct 2022 14:30:28 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4MpphL658Mz3fYP for ; Sat, 15 Oct 2022 01:30:26 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=X867tEYg; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=139.178.84.217; helo=dfw.source.kernel.org; envelope-from=sashal@kernel.org; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=X867tEYg; dkim-atps=neutral Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4MpnvK5dxCz3dxq for ; Sat, 15 Oct 2022 00:54:53 +1100 (AEDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 1BA9461B50; Fri, 14 Oct 2022 13:54:52 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 83730C433D7; Fri, 14 Oct 2022 13:54:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1665755691; bh=L8JkAShHK1tslhN7a3wdPGT9UdCrJ2TNiWURcqWGhpQ=; h=From:To:Cc:Subject:Date:From; b=X867tEYg5U4E/oOnF9n3Ygty6ZzVO+yZdsF8dobyy+yq9qazF8wEvXJfj+l1GFvQG xIkyujxwRgODoNMcyCD7hNueOSpbzXaNrar5+YxuwVc1XTeCoBTHu6kRZNbCRbG4t9 jmClUzT5vNSgH7ACksj9jZbtYEb6yeO8C1S2o5Nv+qt3CdjH7CBrl5BZLRvA3cmrF8 4BO7BxhKYfSs5x+ZKcFhvN0J/+5Ax1ehMIsfITqH4fFs4aEq0r7dZSQCaRBMHbrunw Hu4I1H/lxyl5m03Xwhlzy8Eci2xJtRH6R7u2YStrXcegGnvBaGath7LkYAQgZIkABV K8joA6wmLt1mg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH AUTOSEL 4.14 1/4] powerpc/selftests: Use timersub() for gettimeofday() Date: Fri, 14 Oct 2022 09:54:44 -0400 Message-Id: <20221014135448.2110152-1-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sasha Levin , ye xingchen , Zeal Robot , linuxppc-dev@lists.ozlabs.org, linux-kselftest@vger.kernel.org, shuah@kernel.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: ye xingchen [ Upstream commit c814bf958926ff45a9c1e899bd001006ab6cfbae ] Use timersub() function to simplify the code. Reported-by: Zeal Robot Signed-off-by: ye xingchen Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220816105106.82666-1-ye.xingchen@zte.com.cn Signed-off-by: Sasha Levin --- tools/testing/selftests/powerpc/benchmarks/gettimeofday.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/powerpc/benchmarks/gettimeofday.c b/tools/testing/selftests/powerpc/benchmarks/gettimeofday.c index 3af3c21e8036..7f4bb84f1c9c 100644 --- a/tools/testing/selftests/powerpc/benchmarks/gettimeofday.c +++ b/tools/testing/selftests/powerpc/benchmarks/gettimeofday.c @@ -12,7 +12,7 @@ static int test_gettimeofday(void) { int i; - struct timeval tv_start, tv_end; + struct timeval tv_start, tv_end, tv_diff; gettimeofday(&tv_start, NULL); @@ -20,7 +20,9 @@ static int test_gettimeofday(void) gettimeofday(&tv_end, NULL); } - printf("time = %.6f\n", tv_end.tv_sec - tv_start.tv_sec + (tv_end.tv_usec - tv_start.tv_usec) * 1e-6); + timersub(&tv_start, &tv_end, &tv_diff); + + printf("time = %.6f\n", tv_diff.tv_sec + (tv_diff.tv_usec) * 1e-6); return 0; } -- 2.35.1