diff mbox series

[v2,1/2] drm/amdgpu: Temporarily disable broken Clang builds due to blown stack-frame

Message ID 20221125120750.3537134-2-lee@kernel.org
State New
Headers
Series Fix a bunch of allmodconfig errors |

Commit Message

Lee Jones Nov. 25, 2022, 12:07 p.m. UTC 
  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/amd/display/Kconfig | 7 +++++++
 1 file changed, 7 insertions(+)

Comments

Arnd Bergmann Nov. 25, 2022, 12:11 p.m. UTC | #1 
On Fri, Nov 25, 2022, at 13:07, Lee Jones wrote:
> 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>

Acked-by: Arnd Bergmann <arnd@arndb.de>
Nathan Chancellor Nov. 28, 2022, 5:52 a.m. UTC | #2 
On Fri, Nov 25, 2022 at 12:07:49PM +0000, Lee Jones wrote:
> 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>

Reviewed-by: Nathan Chancellor <nathan@kernel.org>

> ---
>  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 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.
>  
> +	  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
> -- 
> 2.38.1.584.g0f3c55d4c2-goog
>
diff mbox series

Patch

diff --git a/drivers/gpu/drm/amd/display/Kconfig b/drivers/gpu/drm/amd/display/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.
 
+	  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