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linux/arch/powerpc
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Samuel Holland be2fc65d66 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 commit a28e4b672f ("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
2024-05-30 22:57:27 +10:00
..
boot Kbuild updates for v6.10 2024-05-18 12:39:20 -07:00
configs printk changes for 6.10 2024-05-15 12:34:46 -07:00
crypto powerpc/crypto/chacha-p10: Fix failure on non Power10 2024-04-05 00:02:18 +11:00
include powerpc/uaccess: Use YZ asm constraint for ld 2024-05-30 22:57:27 +10:00
kernel mseal: wire up mseal syscall 2024-05-23 19:40:26 -07:00
kexec powerpc/crash: remove unnecessary NULL check before kvfree() 2024-05-03 12:20:50 +10:00
kvm powerpc updates for 6.10 2024-05-17 09:05:46 -07:00
lib powerpc updates for 6.10 2024-05-17 09:05:46 -07:00
math-emu powerpc/math-emu: Inhibit W=1 warnings 2022-09-08 11:11:18 +10:00
mm The usual shower of singleton fixes and minor series all over MM, 2024-05-19 09:21:03 -07:00
net powerpc/bpf: enforce full ordering for ATOMIC operations with BPF_FETCH 2024-05-29 22:12:42 +10:00
perf driver core: Add device_show_string() helper for sysfs attributes 2024-05-04 17:37:03 +02:00
platforms powerpc/pseries/lparcfg: drop error message from guest name lookup 2024-05-30 22:57:26 +10:00
purgatory Makefile: remove redundant tool coverage variables 2024-05-14 23:35:48 +09:00
sysdev powerpc: Fix typos 2024-05-08 00:21:30 +10:00
tools powerpc/tools: Pass -mabi=elfv2 to gcc-check-mprofile-kernel.sh 2023-10-20 17:46:33 +11:00
xmon powerpc/xmon: Check cpu id in commands "c#", "dp#" and "dx#" 2024-05-08 00:48:32 +10:00
Kbuild powerpc: Fix fatal warnings flag for LLVM's integrated assembler 2024-04-08 16:06:41 +10:00
Kconfig powerpc: Limit ARCH_HAS_KERNEL_FPU_SUPPORT to PPC64 2024-05-30 22:57:27 +10:00
Kconfig.debug powerpc/ps3: move udbg_shutdown_ps3gelic prototype 2023-11-21 12:06:50 +11:00
Makefile powerpc: implement ARCH_HAS_KERNEL_FPU_SUPPORT 2024-05-19 14:36:18 -07:00
Makefile.postlink kbuild: remove ARCH_POSTLINK from module builds 2023-10-28 21:10:08 +09:00