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 77C57C4332F for ; Fri, 14 Oct 2022 14:13:19 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4MppJZ11Jvz3f1b for ; Sat, 15 Oct 2022 01:13:18 +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=jCSWCjzQ; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=145.40.68.75; helo=ams.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=jCSWCjzQ; dkim-atps=neutral Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) (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 4Mpnsx0v50z3ds9 for ; Sat, 15 Oct 2022 00:53:41 +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 ams.source.kernel.org (Postfix) with ESMTPS id A3EF7B82357; Fri, 14 Oct 2022 13:53:38 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 719E6C433C1; Fri, 14 Oct 2022 13:53:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1665755617; bh=BOeUAW08y22Ui11TSsJcGyob9iBOvUvzBgY7Wtfqjlo=; h=From:To:Cc:Subject:Date:From; b=jCSWCjzQguYhk3egqxRXogehA8nJdrPB6dAnRHnccL2dWwHO1nB6GHicciVMui25b TpF1fJKnZ+oUZ2jmaLtFSN5p98DbGlZxQDZ8/CkbFmGYdYc3rMU/k60N+rJe4zCZDw rnpUNfUoWSNzcJa3++CeP0pD83uBdK+EkY3xlEdjE9eBbYuUJf55lfjSYur0vYMjn5 VNfob5z8y3AjiWx0IhlFzRNSgJhLCa2axZGIpvYtN58rGSN2+WLqnX/Od9iKv1zjfZ 9TWefJ0oJdjSsKhvDRtIgr8Nyx/dyNAnoii8I+kNEdPuaEuRgEOPzEEZxjLhxVWr2c qxTJUxWrCHtyQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH AUTOSEL 5.10 1/7] powerpc/selftests: Use timersub() for gettimeofday() Date: Fri, 14 Oct 2022 09:53:27 -0400 Message-Id: <20221014135334.2109814-1-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 6b415683357b..580fcac0a09f 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