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https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git
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a2faac3986
Similar to commita6c30873ee("ARM: 8989/1: use .fpu assembler directives instead of assembler arguments"). GCC and GNU binutils support setting the "sub arch" via -march=, -Wa,-march, target function attribute, and .arch assembler directive. Clang was missing support for -Wa,-march=, but this was implemented in clang-13. The behavior of both GCC and Clang is to prefer -Wa,-march= over -march= for assembler and assembler-with-cpp sources, but Clang will warn about the -march= being unused. clang: warning: argument unused during compilation: '-march=armv6k' [-Wunused-command-line-argument] Since most assembler is non-conditionally assembled with one sub arch (modulo arch/arm/delay-loop.S which conditionally is assembled as armv4 based on CONFIG_ARCH_RPC, and arch/arm/mach-at91/pm-suspend.S which is conditionally assembled as armv7-a based on CONFIG_CPU_V7), prefer the .arch assembler directive. Add a few more instances found in compile testing as found by Arnd and Nathan. Link:1d51c699b9Link: https://bugs.llvm.org/show_bug.cgi?id=48894 Link: https://github.com/ClangBuiltLinux/linux/issues/1195 Link: https://github.com/ClangBuiltLinux/linux/issues/1315 Suggested-by: Arnd Bergmann <arnd@arndb.de> Suggested-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Tested-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
47 lines
1.4 KiB
Makefile
47 lines
1.4 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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#
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# linux/arch/arm/lib/Makefile
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#
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# Copyright (C) 1995-2000 Russell King
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#
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lib-y := changebit.o csumipv6.o csumpartial.o \
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csumpartialcopy.o csumpartialcopyuser.o clearbit.o \
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delay.o delay-loop.o findbit.o memchr.o memcpy.o \
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memmove.o memset.o setbit.o \
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strchr.o strrchr.o \
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testchangebit.o testclearbit.o testsetbit.o \
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ashldi3.o ashrdi3.o lshrdi3.o muldi3.o \
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ucmpdi2.o lib1funcs.o div64.o \
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io-readsb.o io-writesb.o io-readsl.o io-writesl.o \
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call_with_stack.o bswapsdi2.o
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mmu-y := clear_user.o copy_page.o getuser.o putuser.o \
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copy_from_user.o copy_to_user.o
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ifdef CONFIG_CC_IS_CLANG
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lib-y += backtrace-clang.o
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else
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lib-y += backtrace.o
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endif
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# using lib_ here won't override already available weak symbols
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obj-$(CONFIG_UACCESS_WITH_MEMCPY) += uaccess_with_memcpy.o
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lib-$(CONFIG_MMU) += $(mmu-y)
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ifeq ($(CONFIG_CPU_32v3),y)
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lib-y += io-readsw-armv3.o io-writesw-armv3.o
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else
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lib-y += io-readsw-armv4.o io-writesw-armv4.o
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endif
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$(obj)/csumpartialcopy.o: $(obj)/csumpartialcopygeneric.S
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$(obj)/csumpartialcopyuser.o: $(obj)/csumpartialcopygeneric.S
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ifeq ($(CONFIG_KERNEL_MODE_NEON),y)
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NEON_FLAGS := -march=armv7-a -mfloat-abi=softfp -mfpu=neon
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CFLAGS_xor-neon.o += $(NEON_FLAGS)
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obj-$(CONFIG_XOR_BLOCKS) += xor-neon.o
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endif
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