From nobody Fri Sep 19 11:09:32 2025 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 A3B2EC4332F for ; Fri, 25 Nov 2022 12:08:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229676AbiKYMIK (ORCPT ); Fri, 25 Nov 2022 07:08:10 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34126 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229631AbiKYMIG (ORCPT ); Fri, 25 Nov 2022 07:08:06 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8A99B22B1C for ; Fri, 25 Nov 2022 04:08:05 -0800 (PST) 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 3A399B82A7F for ; Fri, 25 Nov 2022 12:08:04 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E9E25C43470; Fri, 25 Nov 2022 12:07:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1669378083; bh=TwhSqRrup21U4CF27sTO/M6pc2iifKvlpLvARqgBso8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tlQQJPMETl9fmBXDukSJVB/J+xVITuSX3gm/HkozT6+4sh82miMixQPUN9aNwWv8a x2IpaZ4alkUFLFbpXFfXSzXE8h7iq/k7KM06T0Kd2wceVVmw7dmBU1+dqjTiNfuRZf hLuCsI5j4Y68+NnEkXgpFBAzIMOs6je7pW1J63960/clm/pxtYbB1rPQtVFFKEAsF6 /P/IezXyogA9f4OhyHHtNPYA9yhh7J4mI5GKUxWZ9Hc1uZBvjYph0YWrKgpFVGTJm0 Duyejm8EeY8NbCxdgFHzQMW84yHjwwQVketQGnuXTzn4vzaV7tOMeOGQCmh61YPzaj 8Lswuge7nEUNA== From: Lee Jones To: lee@kernel.org, arnd@arndb.de, akpm@linux-foundation.org, nathan@kernel.org, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, daniel@ffwll.ch, ndesaulniers@google.com, trix@redhat.com, harry.wentland@amd.com, sunpeng.li@amd.com, Rodrigo.Siqueira@amd.com, alexander.deucher@amd.com, christian.koenig@amd.com, Xinhui.Pan@amd.com Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH v2 1/2] drm/amdgpu: Temporarily disable broken Clang builds due to blown stack-frame Date: Fri, 25 Nov 2022 12:07:49 +0000 Message-Id: <20221125120750.3537134-2-lee@kernel.org> X-Mailer: git-send-email 2.38.1.584.g0f3c55d4c2-goog In-Reply-To: <20221125120750.3537134-1-lee@kernel.org> References: <20221125120750.3537134-1-lee@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" calculate_bandwidth() is presently broken on all !(X86_64 || SPARC64 || ARM= 64) architectures built with Clang (all released versions), whereby the stack frame gets blown up to well over 5k. This would cause an immediate kernel panic on most architectures. We'll revert this when the following bug repo= rt has been resolved: https://github.com/llvm/llvm-project/issues/41896. Suggested-by: Arnd Bergmann Signed-off-by: Lee Jones Acked-by: Arnd Bergmann Reviewed-by: Nathan Chancellor --- drivers/gpu/drm/amd/display/Kconfig | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/gpu/drm/amd/display/Kconfig b/drivers/gpu/drm/amd/disp= lay/Kconfig index 6925e0280dbe6..f4f3d2665a6b2 100644 --- a/drivers/gpu/drm/amd/display/Kconfig +++ b/drivers/gpu/drm/amd/display/Kconfig @@ -5,6 +5,7 @@ menu "Display Engine Configuration" config DRM_AMD_DC bool "AMD DC - Enable new display engine" default y + depends on BROKEN || !CC_IS_CLANG || X86_64 || SPARC64 || ARM64 select SND_HDA_COMPONENT if SND_HDA_CORE select DRM_AMD_DC_DCN if (X86 || PPC_LONG_DOUBLE_128) help @@ -12,6 +13,12 @@ config DRM_AMD_DC support for AMDGPU. This adds required support for Vega and Raven ASICs. =20 + calculate_bandwidth() is presently broken on all !(X86_64 || SPARC64 ||= ARM64) + architectures built with Clang (all released versions), whereby the sta= ck + frame gets blown up to well over 5k. This would cause an immediate ker= nel + panic on most architectures. We'll revert this when the following bug = report + has been resolved: https://github.com/llvm/llvm-project/issues/41896. + config DRM_AMD_DC_DCN def_bool n help --=20 2.38.1.584.g0f3c55d4c2-goog