From ac2d7fa9084892c2c1232016ecdeadf4b354212f Mon Sep 17 00:00:00 2001 From: Lee Jones Date: Fri, 25 Nov 2022 12:07:49 +0000 Subject: [PATCH] drm/amdgpu: temporarily disable broken Clang builds due to blown stack-frame MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit commit 6f6cb1714365a07dbc66851879538df9f6969288 upstream. Patch series "Fix a bunch of allmodconfig errors", v2. Since b339ec9c229aa ("kbuild: Only default to -Werror if COMPILE_TEST") WERROR now defaults to COMPILE_TEST meaning that it's enabled for allmodconfig builds. This leads to some interesting build failures when using Clang, each resolved in this set. With this set applied, I am able to obtain a successful allmodconfig Arm build. This patch (of 2): calculate_bandwidth() is presently broken on all !(X86_64 || SPARC64 || ARM64) 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 report has been resolved: https://github.com/llvm/llvm-project/issues/41896. Link: https://lkml.kernel.org/r/20221125120750.3537134-1-lee@kernel.org Link: https://lkml.kernel.org/r/20221125120750.3537134-2-lee@kernel.org Signed-off-by: Lee Jones Suggested-by: Arnd Bergmann Acked-by: Arnd Bergmann Cc: Alex Deucher Cc: "Christian König" Cc: Daniel Vetter Cc: David Airlie Cc: Harry Wentland Cc: Lee Jones Cc: Leo Li Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: Nathan Chancellor Cc: Nick Desaulniers Cc: "Pan, Xinhui" Cc: Rodrigo Siqueira Cc: Thomas Zimmermann Cc: Tom Rix Cc: Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- 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/display/Kconfig index 127667e549c19..f25a2c80afcfd 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 || PPC64) && !(KCOV_INSTRUMENT_ALL && KCOV_ENABLE_COMPARISONS) help @@ -12,6 +13,12 @@ config DRM_AMD_DC support for AMDGPU. This adds required support for Vega and Raven ASICs. + calculate_bandwidth() is presently broken on all !(X86_64 || SPARC64 || ARM64) + 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 report + has been resolved: https://github.com/llvm/llvm-project/issues/41896. + config DRM_AMD_DC_DCN def_bool n help -- 2.30.2