From: Nathan Chancellor <nathan@kernel.org>
To: mpe@ellerman.id.au
Cc: npiggin@gmail.com, christophe.leroy@csgroup.eu,
aneesh.kumar@kernel.org, naveen.n.rao@linux.ibm.com,
morbo@google.com, justinstitt@google.com,
linuxppc-dev@lists.ozlabs.org, patches@lists.linux.dev,
llvm@lists.linux.dev, stable@vger.kernel.org
Subject: Re: [PATCH] powerpc: xor_vmx: Add '-mhard-float' to CFLAGS
Date: Tue, 5 Mar 2024 15:43:15 -0700 [thread overview]
Message-ID: <20240305224315.GA2361659@dev-arch.thelio-3990X> (raw)
In-Reply-To: <20240127-ppc-xor_vmx-drop-msoft-float-v1-1-f24140e81376@kernel.org>
Ping? We have been applying this in our CI since it was sent, it would
be nice to have this upstream soon so it can start filtering through the
stable trees.
On Sat, Jan 27, 2024 at 11:07:43AM -0700, Nathan Chancellor wrote:
> arch/powerpc/lib/xor_vmx.o is built with '-msoft-float' (from the main
> powerpc Makefile) and '-maltivec' (from its CFLAGS), which causes an
> error when building with clang after a recent change in main:
>
> error: option '-msoft-float' cannot be specified with '-maltivec'
> make[6]: *** [scripts/Makefile.build:243: arch/powerpc/lib/xor_vmx.o] Error 1
>
> Explicitly add '-mhard-float' before '-maltivec' in xor_vmx.o's CFLAGS
> to override the previous inclusion of '-msoft-float' (as the last option
> wins), which matches how other areas of the kernel use '-maltivec', such
> as AMDGPU.
>
> Cc: stable@vger.kernel.org
> Closes: https://github.com/ClangBuiltLinux/linux/issues/1986
> Link: https://github.com/llvm/llvm-project/commit/4792f912b232141ecba4cbae538873be3c28556c
> Signed-off-by: Nathan Chancellor <nathan@kernel.org>
> ---
> arch/powerpc/lib/Makefile | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
> index 6eac63e79a89..0ab65eeb93ee 100644
> --- a/arch/powerpc/lib/Makefile
> +++ b/arch/powerpc/lib/Makefile
> @@ -76,7 +76,7 @@ obj-$(CONFIG_PPC_LIB_RHEAP) += rheap.o
> obj-$(CONFIG_FTR_FIXUP_SELFTEST) += feature-fixups-test.o
>
> obj-$(CONFIG_ALTIVEC) += xor_vmx.o xor_vmx_glue.o
> -CFLAGS_xor_vmx.o += -maltivec $(call cc-option,-mabi=altivec)
> +CFLAGS_xor_vmx.o += -mhard-float -maltivec $(call cc-option,-mabi=altivec)
> # Enable <altivec.h>
> CFLAGS_xor_vmx.o += -isystem $(shell $(CC) -print-file-name=include)
>
>
> ---
> base-commit: 6613476e225e090cc9aad49be7fa504e290dd33d
> change-id: 20240127-ppc-xor_vmx-drop-msoft-float-ad68b437f86c
>
> Best regards,
> --
> Nathan Chancellor <nathan@kernel.org>
>
WARNING: multiple messages have this Message-ID (diff)
From: Nathan Chancellor <nathan@kernel.org>
To: mpe@ellerman.id.au
Cc: llvm@lists.linux.dev, patches@lists.linux.dev,
aneesh.kumar@kernel.org, npiggin@gmail.com,
justinstitt@google.com, naveen.n.rao@linux.ibm.com,
stable@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
morbo@google.com
Subject: Re: [PATCH] powerpc: xor_vmx: Add '-mhard-float' to CFLAGS
Date: Tue, 5 Mar 2024 15:43:15 -0700 [thread overview]
Message-ID: <20240305224315.GA2361659@dev-arch.thelio-3990X> (raw)
In-Reply-To: <20240127-ppc-xor_vmx-drop-msoft-float-v1-1-f24140e81376@kernel.org>
Ping? We have been applying this in our CI since it was sent, it would
be nice to have this upstream soon so it can start filtering through the
stable trees.
On Sat, Jan 27, 2024 at 11:07:43AM -0700, Nathan Chancellor wrote:
> arch/powerpc/lib/xor_vmx.o is built with '-msoft-float' (from the main
> powerpc Makefile) and '-maltivec' (from its CFLAGS), which causes an
> error when building with clang after a recent change in main:
>
> error: option '-msoft-float' cannot be specified with '-maltivec'
> make[6]: *** [scripts/Makefile.build:243: arch/powerpc/lib/xor_vmx.o] Error 1
>
> Explicitly add '-mhard-float' before '-maltivec' in xor_vmx.o's CFLAGS
> to override the previous inclusion of '-msoft-float' (as the last option
> wins), which matches how other areas of the kernel use '-maltivec', such
> as AMDGPU.
>
> Cc: stable@vger.kernel.org
> Closes: https://github.com/ClangBuiltLinux/linux/issues/1986
> Link: https://github.com/llvm/llvm-project/commit/4792f912b232141ecba4cbae538873be3c28556c
> Signed-off-by: Nathan Chancellor <nathan@kernel.org>
> ---
> arch/powerpc/lib/Makefile | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
> index 6eac63e79a89..0ab65eeb93ee 100644
> --- a/arch/powerpc/lib/Makefile
> +++ b/arch/powerpc/lib/Makefile
> @@ -76,7 +76,7 @@ obj-$(CONFIG_PPC_LIB_RHEAP) += rheap.o
> obj-$(CONFIG_FTR_FIXUP_SELFTEST) += feature-fixups-test.o
>
> obj-$(CONFIG_ALTIVEC) += xor_vmx.o xor_vmx_glue.o
> -CFLAGS_xor_vmx.o += -maltivec $(call cc-option,-mabi=altivec)
> +CFLAGS_xor_vmx.o += -mhard-float -maltivec $(call cc-option,-mabi=altivec)
> # Enable <altivec.h>
> CFLAGS_xor_vmx.o += -isystem $(shell $(CC) -print-file-name=include)
>
>
> ---
> base-commit: 6613476e225e090cc9aad49be7fa504e290dd33d
> change-id: 20240127-ppc-xor_vmx-drop-msoft-float-ad68b437f86c
>
> Best regards,
> --
> Nathan Chancellor <nathan@kernel.org>
>
next prev parent reply other threads:[~2024-03-05 22:43 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-27 18:07 [PATCH] powerpc: xor_vmx: Add '-mhard-float' to CFLAGS Nathan Chancellor
2024-01-27 18:07 ` Nathan Chancellor
2024-03-05 22:43 ` Nathan Chancellor [this message]
2024-03-05 22:43 ` Nathan Chancellor
2024-03-06 1:01 ` Michael Ellerman
2024-03-06 1:01 ` Michael Ellerman
2024-03-06 16:48 ` Nathan Chancellor
2024-03-06 16:48 ` Nathan Chancellor
2024-03-13 13:19 ` Michael Ellerman
2024-03-13 13:19 ` Michael Ellerman
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