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MIPS: Always use -Wa,-msoft-float and eliminate GAS_HAS_SET_HARDFLOAT
authorNathan Chancellor <nathan@kernel.org>
Thu, 12 Jan 2023 03:04:59 +0000 (20:04 -0700)
committerMasahiro Yamada <masahiroy@kernel.org>
Thu, 26 Jan 2023 03:41:16 +0000 (12:41 +0900)
commit80a20d2f8288afcd6036bbab8717061806ace4f2
treeaefc3c3455c3190439ada309904d3138d4530127
parent994f5f7816ff963f49269cfc97f63cb2e4edb84f
MIPS: Always use -Wa,-msoft-float and eliminate GAS_HAS_SET_HARDFLOAT

-Wa,-msoft-float is tested with as-option, which will be a problem for
clang with an upcoming change to move as-option to use KBUILD_AFLAGS
instead of KBUILD_CFLAGS due to a lack of '-mno-abicalls' in
KBUILD_AFLAGS at the point that this check occurs; $(cflags-y) is added
to KBUILD_AFLAGS towards the end of this file.

  clang: error: ignoring '-fno-PIE' option as it cannot be used with implicit usage of -mabicalls and the N64 ABI [-Werror,-Woption-ignored]

This could be resolved by switching to a cc-option check but
'$(cflags-y)' would need to be added so that '-mno-abicalls' is present
for the test. However, this check is no longer necessary, as
-msoft-float is supported by all supported assembler versions (GNU as
2.25+ and LLVM 11+). Eliminate GAS_HAS_SET_HARDFLOAT and all of its
uses, inlining SET_HARDFLOAT where necessary.

Link: https://lore.kernel.org/202209101939.bvk64Fok-lkp@intel.com/
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Linux Kernel Functional Testing <lkft@linaro.org>
Tested-by: Anders Roxell <anders.roxell@linaro.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
arch/mips/Makefile
arch/mips/include/asm/asmmacro-32.h
arch/mips/include/asm/asmmacro.h
arch/mips/include/asm/fpregdef.h
arch/mips/include/asm/mipsregs.h
arch/mips/kernel/genex.S
arch/mips/kernel/r2300_fpu.S
arch/mips/kernel/r4k_fpu.S
arch/mips/kvm/fpu.S