On 5/24/24 06:18, Alex Deucher wrote:
On Fri, May 24, 2024 at 9:17 AM Alex Deucher <alexdeucher@xxxxxxxxx> wrote:
On Fri, May 24, 2024 at 5:16 AM Guenter Roeck <linux@xxxxxxxxxxxx> 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@xxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Samuel Holland <samuel.holland@xxxxxxxxxx>
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.
mdgpu_dm_helpers.o is built with -msoft-float, display_mode_lib.o is built
with -mhard-float.
-msoft-float is from
arch/powerpc/Makefile:KBUILD_CFLAGS += $(CC_FLAGS_NO_FPU)
-mhard-float is from
drivers/gpu/drm/amd/display/dc/dml/Makefile:dml_ccflags := $(CC_FLAGS_FPU)
drivers/gpu/drm/amd/display/dc/dml/Makefile:dml_rcflags := $(CC_FLAGS_NO_FPU)
drivers/gpu/drm/amd/display/dc/dml2/Makefile:dml2_ccflags := $(CC_FLAGS_FPU)
drivers/gpu/drm/amd/display/dc/dml2/Makefile:dml2_rcflags := $(CC_FLAGS_NO_FPU)
Unfortunately I have no idea know how to resolve this.
Guenter
