From nobody Mon Feb 9 15:17:29 2026 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 810D4C7EE24 for ; Fri, 2 Jun 2023 10:10:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235078AbjFBKKL (ORCPT ); Fri, 2 Jun 2023 06:10:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37756 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235187AbjFBKJr (ORCPT ); Fri, 2 Jun 2023 06:09:47 -0400 Received: from dggsgout11.his.huawei.com (dggsgout11.his.huawei.com [45.249.212.51]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 91F5CE5B for ; Fri, 2 Jun 2023 03:09:28 -0700 (PDT) Received: from mail02.huawei.com (unknown [172.30.67.143]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4QXdyV3qRyz4f3jqc for ; Fri, 2 Jun 2023 18:09:22 +0800 (CST) Received: from ubuntu20.huawei.com (unknown [10.67.174.33]) by APP1 (Coremail) with SMTP id cCh0CgCH8iy2v3lkYWubKA--.54066S2; Fri, 02 Jun 2023 18:09:23 +0800 (CST) From: "GONG, Ruiqi" To: Harry Wentland , Leo Li , Rodrigo Siqueira , Alex Deucher , Pan Xinhui , David Airlie , Daniel Vetter Cc: amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Wang Weiyang , Xiu Jianfeng , gongruiqi1@huawei.com Subject: [PATCH] drm/amd/display: fix compilation error due to shifting negative value Date: Fri, 2 Jun 2023 18:12:33 +0800 Message-Id: <20230602101233.1255276-1-gongruiqi@huaweicloud.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: cCh0CgCH8iy2v3lkYWubKA--.54066S2 X-Coremail-Antispam: 1UD129KBjvJXoW7Aw15JF1fXFyxZw47ZrW5KFg_yoW8Gr1rpF sxJry8WF1UuF4IyFyxCa9ru3W3Jas5XFWqyrZrW3sIk3W7tF15W39xKr1Dtryj9FWjywsx tFZ2gr47JwnrAw7anT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUkFb4IE77IF4wAFF20E14v26r4j6ryUM7CY07I20VC2zVCF04k2 6cxKx2IYs7xG6r1S6rWUM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4 vEj48ve4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xIIjxv20xvEc7Cj xVAFwI0_Cr0_Gr1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I 0E14v26rxl6s0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40E x7xfMcIj6xIIjxv20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x 0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41lFIxGxcIEc7CjxVA2Y2ka0xkIwI1l42xK82IY c2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s 026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF 0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4j6F4UMIIF0x vE42xK8VAvwI8IcIk0rVWrZr1j6s0DMIIF0xvEx4A2jsIE14v26r1j6r4UMIIF0xvEx4A2 jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x07UWE__UUUUU= X-CM-SenderInfo: pjrqw2pxltxq5kxd4v5lfo033gof0z/ X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Currently compiling linux-next with allmodconfig triggers the following error: ./drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h: In function = =E2=80=98dc_fixpt_truncate=E2=80=99: ./drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:528:22: error:= left shift of negative value [-Werror=3Dshift-negative-value] 528 | arg.value &=3D (~0LL) << (FIXED31_32_BITS_PER_FRACTIONAL_PART - fr= ac_bits); | ^~ Use `unsigned long long` instead. Signed-off-by: GONG, Ruiqi --- drivers/gpu/drm/amd/display/include/fixed31_32.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/include/fixed31_32.h b/drivers/gpu= /drm/amd/display/include/fixed31_32.h index ece97ae0e826..d4cf7ead1d87 100644 --- a/drivers/gpu/drm/amd/display/include/fixed31_32.h +++ b/drivers/gpu/drm/amd/display/include/fixed31_32.h @@ -525,7 +525,7 @@ static inline struct fixed31_32 dc_fixpt_truncate(struc= t fixed31_32 arg, unsigne =20 if (negative) arg.value =3D -arg.value; - arg.value &=3D (~0LL) << (FIXED31_32_BITS_PER_FRACTIONAL_PART - frac_bits= ); + arg.value &=3D (~0ULL) << (FIXED31_32_BITS_PER_FRACTIONAL_PART - frac_bit= s); if (negative) arg.value =3D -arg.value; return arg; --=20 2.25.1