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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 60159C433F5 for ; Thu, 14 Oct 2021 21:19:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4B1236108B for ; Thu, 14 Oct 2021 21:19:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233058AbhJNVVb (ORCPT ); Thu, 14 Oct 2021 17:21:31 -0400 Received: from mail.kernel.org ([198.145.29.99]:60724 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230094AbhJNVV3 (ORCPT ); Thu, 14 Oct 2021 17:21:29 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id CB81661040; Thu, 14 Oct 2021 21:19:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1634246364; bh=MpJNT0WyCGwBQXF7gN/2cyrmmi7LfgmPgWDBNXOdBzA=; h=From:To:Cc:Subject:Date:From; b=TO7YOhD53c/vD2A/0vTHTqITac7DLVFZVpBXIJEIBJ2aOjsZ9ukxQ0dvUGUcc2l9S IiZ7kH0NgxgYhvHHT6ATO0xw70dOH+gXkRAYLFmx45rqVDd3QKr21aRMlXDRzwBqQI lcocduH089hv9pPpY5Iu3Hj5u73c8ezOaWhHnTfD+sQQDwyIQlvIQQ8uQfKdDN+/z7 SJCN5AH8SrTv2/dV0wpjDpDXXp03W9EkczqXiF97Ssp5mHEVPWKKkOGOgDiflXRYZk TgBvKav8hmAeW8iegRlhm0dnSLIx9GRPHwfvbBhcSua1EDDs7qrrODnKecwGNNLCLg 5khe1wGP3fE+Q== From: Nathan Chancellor To: Jani Nikula , Joonas Lahtinen , Rodrigo Vivi Cc: Nick Desaulniers , intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, Nathan Chancellor Subject: [PATCH] drm/i915: Avoid bitwise vs logical OR warning in snb_wm_latency_quirk() Date: Thu, 14 Oct 2021 14:19:16 -0700 Message-Id: <20211014211916.3550122-1-nathan@kernel.org> X-Mailer: git-send-email 2.33.1.637.gf443b226ca MIME-Version: 1.0 X-Patchwork-Bot: notify Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org A new warning in clang points out a place in this file where a bitwise OR is being used with boolean types: drivers/gpu/drm/i915/intel_pm.c:3066:12: warning: use of bitwise '|' with boolean operands [-Wbitwise-instead-of-logical] changed = ilk_increase_wm_latency(dev_priv, dev_priv->wm.pri_latency, 12) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ This construct is intentional, as it allows every one of the calls to ilk_increase_wm_latency() to occur (instead of short circuiting with logical OR) while still caring about the result of each call. To make this clearer to the compiler, use the '|=' operator to assign the result of each ilk_increase_wm_latency() call to changed, which keeps the meaning of the code the same but makes it obvious that every one of these calls is expected to happen. Link: https://github.com/ClangBuiltLinux/linux/issues/1473 Reported-by: Nick Desaulniers Signed-off-by: Nathan Chancellor --- drivers/gpu/drm/i915/intel_pm.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index f90fe39cf8ca..aaa3a0998e4c 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -3050,9 +3050,9 @@ static void snb_wm_latency_quirk(struct drm_i915_private *dev_priv) * The BIOS provided WM memory latency values are often * inadequate for high resolution displays. Adjust them. */ - changed = ilk_increase_wm_latency(dev_priv, dev_priv->wm.pri_latency, 12) | - ilk_increase_wm_latency(dev_priv, dev_priv->wm.spr_latency, 12) | - ilk_increase_wm_latency(dev_priv, dev_priv->wm.cur_latency, 12); + changed = ilk_increase_wm_latency(dev_priv, dev_priv->wm.pri_latency, 12); + changed |= ilk_increase_wm_latency(dev_priv, dev_priv->wm.spr_latency, 12); + changed |= ilk_increase_wm_latency(dev_priv, dev_priv->wm.cur_latency, 12); if (!changed) return; base-commit: d73b17465d6da0a94bc0fcc86b150e1e923e8f71 -- 2.33.1.637.gf443b226ca