From: Lee Jones <lee@kernel.org>
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 2/3] drm/amdgpu: Temporarily disable broken Clang builds due to blown stack-frame
Date: Fri, 25 Nov 2022 09:25:16 +0000 [thread overview]
Message-ID: <20221125092517.3074989-3-lee@kernel.org> (raw)
In-Reply-To: <20221125092517.3074989-1-lee@kernel.org>
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.
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Lee Jones <lee@kernel.org>
---
drivers/gpu/drm/Kconfig | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 34f5a092c99e7..1fa7b9760adb8 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -265,6 +265,7 @@ source "drivers/gpu/drm/radeon/Kconfig"
config DRM_AMDGPU
tristate "AMD GPU"
+ depends on BROKEN || !CC_IS_CLANG || !(X86_64 || SPARC64 || ARM64)
depends on DRM && PCI && MMU
select FW_LOADER
select DRM_DISPLAY_DP_HELPER
@@ -289,6 +290,12 @@ config DRM_AMDGPU
help
Choose this option if you have a recent AMD Radeon graphics card.
+ 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.
+
If M is selected, the module will be called amdgpu.
source "drivers/gpu/drm/amd/amdgpu/Kconfig"
--
2.38.1.584.g0f3c55d4c2-goog
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next prev parent reply other threads:[~2022-11-25 9:28 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-25 9:25 [PATCH 0/3] Fix a bunch of allmodconfig errors Lee Jones
2022-11-25 9:25 ` [PATCH 1/3] drm/amd/display/dc/calcs/dce_calcs: Break-out a stack-heavy chunk of code Lee Jones
2022-11-25 10:09 ` Arnd Bergmann
2022-11-25 9:25 ` Lee Jones [this message]
2022-11-25 10:06 ` [PATCH 2/3] drm/amdgpu: Temporarily disable broken Clang builds due to blown stack-frame Arnd Bergmann
2022-11-25 9:25 ` [PATCH 3/3] Kconfig.debug: Provide a little extra FRAME_WARN leeway when KASAN is enabled Lee Jones
2022-11-25 10:05 ` Arnd Bergmann
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