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From: Guenter Roeck <linux@roeck-us.net>
To: Alex Deucher <alexdeucher@gmail.com>
Cc: Samuel Holland <samuel.holland@sifive.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	linux-arm-kernel@lists.infradead.org, x86@kernel.org,
	linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
	linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org,
	Christoph Hellwig <hch@lst.de>,
	loongarch@lists.linux.dev, amd-gfx@lists.freedesktop.org,
	Alex Deucher <alexander.deucher@amd.com>
Subject: Re: [PATCH v4 13/15] drm/amd/display: Use ARCH_HAS_KERNEL_FPU_SUPPORT
Date: Fri, 24 May 2024 06:53:16 -0700	[thread overview]
Message-ID: <91f8b384-9a6a-4435-9f9a-7a65a7c62bf2@roeck-us.net> (raw)
In-Reply-To: <1e088782-418d-41e2-843f-b3d6cd3ab4f7@roeck-us.net>

On 5/24/24 06:43, Guenter Roeck wrote:
> On 5/24/24 06:18, Alex Deucher wrote:
>> On Fri, May 24, 2024 at 9:17 AM Alex Deucher <alexdeucher@gmail.com> wrote:
>>>
>>> On Fri, May 24, 2024 at 5:16 AM Guenter Roeck <linux@roeck-us.net> wrote:
>>>>
>>>> Hi,
>>>>
>>>> On Fri, Mar 29, 2024 at 12:18:28AM -0700, Samuel Holland wrote:
>>>>> Now that all previously-supported architectures select
>>>>> ARCH_HAS_KERNEL_FPU_SUPPORT, this code can depend on that symbol instead
>>>>> of the existing list of architectures. It can also take advantage of the
>>>>> common kernel-mode FPU API and method of adjusting CFLAGS.
>>>>>
>>>>> Acked-by: Alex Deucher <alexander.deucher@amd.com>
>>>>> Reviewed-by: Christoph Hellwig <hch@lst.de>
>>>>> Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
>>>>
>>>> With this patch in the mainline kernel, I get the following build error
>>>> when trying to build powerpc:ppc32_allmodconfig.
>>>>
>>>> powerpc64-linux-ld: drivers/gpu/drm/amd/amdgpu/../display/dc/dml/display_mode_lib.o uses hard float, drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_helpers.o uses soft float
>>>> powerpc64-linux-ld: failed to merge target specific data of file drivers/gpu/drm/amd/amdgpu/../display/dc/dml/display_mode_lib.o
>>>>
>>>> [ repeated many times ]
>>>>
>>>> The problem is no longer seen after reverting this patch.
>>>
>>> Should be fixed with this patch:
>>> https://gitlab.freedesktop.org/agd5f/linux/-/commit/5f56be33f33dd1d50b9433f842c879a20dc00f5b
>>> Will pull it into my -fixes branch.
>>>
>>
>> Nevermind, this is something else.
>>
> 
> Yes, CONFIG_DRM_AMD_DC_FP is enabled in that configuration.
> 

Also, the above patch does not apply upstream; the endif is already in
the correct place in the upstream kernel (though the commit introducing
it adds a blank line at the end of the file)

Guenter


  reply	other threads:[~2024-05-24 13:53 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-03-29  7:18 [PATCH v4 00/15] Unified cross-architecture kernel-mode FPU API Samuel Holland
2024-03-29  7:18 ` [PATCH v4 01/15] arch: Add ARCH_HAS_KERNEL_FPU_SUPPORT Samuel Holland
2024-03-29  7:18 ` [PATCH v4 02/15] ARM: Implement ARCH_HAS_KERNEL_FPU_SUPPORT Samuel Holland
2024-03-29  7:18 ` [PATCH v4 03/15] ARM: crypto: Use CC_FLAGS_FPU for NEON CFLAGS Samuel Holland
2024-03-29  7:18 ` [PATCH v4 04/15] arm64: Implement ARCH_HAS_KERNEL_FPU_SUPPORT Samuel Holland
2024-03-29  7:18 ` [PATCH v4 05/15] arm64: crypto: Use CC_FLAGS_FPU for NEON CFLAGS Samuel Holland
2024-03-29  7:18 ` [PATCH v4 06/15] lib/raid6: " Samuel Holland
2024-03-29  7:18 ` [PATCH v4 07/15] LoongArch: Implement ARCH_HAS_KERNEL_FPU_SUPPORT Samuel Holland
2024-03-29  7:18 ` [PATCH v4 08/15] powerpc: " Samuel Holland
2024-03-29  7:18 ` [PATCH v4 09/15] x86/fpu: Fix asm/fpu/types.h include guard Samuel Holland
2024-03-29 17:30   ` Dave Hansen
2024-03-29  7:18 ` [PATCH v4 10/15] x86: Implement ARCH_HAS_KERNEL_FPU_SUPPORT Samuel Holland
2024-03-29 17:28   ` Dave Hansen
2024-03-29 18:02     ` Samuel Holland
2024-03-29  7:18 ` [PATCH v4 11/15] riscv: Add support for kernel-mode FPU Samuel Holland
2024-03-29  7:18 ` [PATCH v4 12/15] drm/amd/display: Only use hard-float, not altivec on powerpc Samuel Holland
2024-04-30 17:28   ` Harry Wentland
2024-03-29  7:18 ` [PATCH v4 13/15] drm/amd/display: Use ARCH_HAS_KERNEL_FPU_SUPPORT Samuel Holland
2024-04-10 22:21   ` Thiago Jung Bauermann
2024-04-10 22:47     ` Samuel Holland
2024-04-11  1:02       ` Thiago Jung Bauermann
2024-04-11  1:11         ` Samuel Holland
2024-04-11  1:27           ` Thiago Jung Bauermann
2024-04-11  7:15           ` Ard Biesheuvel
2024-04-11  7:31             ` Arnd Bergmann
2024-04-12  1:54               ` Dave Airlie
2024-04-30 17:29   ` Harry Wentland
2024-05-24  4:50   ` Guenter Roeck
2024-05-24 13:17     ` Alex Deucher
2024-05-24 13:18       ` Alex Deucher
2024-05-24 13:43         ` Guenter Roeck
2024-05-24 13:53           ` Guenter Roeck [this message]
2024-05-24 18:23         ` Guenter Roeck
2024-03-29  7:18 ` [PATCH v4 14/15] selftests/fpu: Move FP code to a separate translation unit Samuel Holland
2024-03-29  7:18 ` [PATCH v4 15/15] selftests/fpu: Allow building on other architectures Samuel Holland
2024-04-03 12:51 ` [PATCH v4 00/15] Unified cross-architecture kernel-mode FPU API Christian König

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