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powerpc: Limit ARCH_HAS_KERNEL_FPU_SUPPORT to PPC64
When building a 32-bit kernel, some toolchains do not allow mixing soft float and hard float object files: LD vmlinux.o powerpc64le-unknown-linux-musl-ld: lib/test_fpu_impl.o uses hard float, arch/powerpc/kernel/udbg.o uses soft float powerpc64le-unknown-linux-musl-ld: failed to merge target specific data of file lib/test_fpu_impl.o make[2]: *** [scripts/Makefile.vmlinux_o:62: vmlinux.o] Error 1 make[1]: *** [Makefile:1152: vmlinux_o] Error 2 make: *** [Makefile:240: __sub-make] Error 2 This is not an issue when building a 64-bit kernel. To unbreak the build, limit ARCH_HAS_KERNEL_FPU_SUPPORT to 64-bit kernels. This is okay because the only real user of this option, amdgpu, was previously limited to PPC64 anyway; see commita28e4b672f
("drm/amd/display: use ARCH_HAS_KERNEL_FPU_SUPPORT"). Fixes:01db473e1a
("powerpc: implement ARCH_HAS_KERNEL_FPU_SUPPORT") Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202405250851.Z4daYSWG-lkp@intel.com/ Reported-by: Guenter Roeck <linux@roeck-us.net> Closes: https://lore.kernel.org/lkml/eeffaec3-df63-4e55-ab7a-064a65c00efa@roeck-us.net/ Signed-off-by: Samuel Holland <samuel.holland@sifive.com> Tested-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20240529162852.1209-1-samuel.holland@sifive.com
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@ -137,7 +137,7 @@ config PPC
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select ARCH_HAS_GCOV_PROFILE_ALL
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select ARCH_HAS_HUGEPD if HUGETLB_PAGE
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select ARCH_HAS_KCOV
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select ARCH_HAS_KERNEL_FPU_SUPPORT if PPC_FPU
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select ARCH_HAS_KERNEL_FPU_SUPPORT if PPC64 && PPC_FPU
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select ARCH_HAS_MEMBARRIER_CALLBACKS
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select ARCH_HAS_MEMBARRIER_SYNC_CORE
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select ARCH_HAS_MEMREMAP_COMPAT_ALIGN if PPC_64S_HASH_MMU
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