arm64: alternative: fix build with clang integrated assembler
commit5.4-rM2-2.2.x-imx-squashed6f5459da2b
upstream. Building an arm64 defconfig with clang's integrated assembler, this error occurs: <instantiation>:2:2: error: unrecognized instruction mnemonic _ASM_EXTABLE 9999b, 9f ^ arch/arm64/mm/cache.S:50:1: note: while in macro instantiation user_alt 9f, "dc cvau, x4", "dc civac, x4", 0 ^ While GNU as seems fine with case-sensitive macro instantiations, clang doesn't, so use the actual macro name (_asm_extable) as in the rest of the file. Also checked that the generated assembly matches the GCC output. Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Tested-by: Nick Desaulniers <ndesaulniers@google.com> Fixes:290622efc7
("arm64: fix "dc cvau" cache operation on errata-affected core") Link: https://github.com/ClangBuiltLinux/linux/issues/924 Signed-off-by: Ilie Halip <ilie.halip@gmail.com> Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -221,7 +221,7 @@ alternative_endif
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.macro user_alt, label, oldinstr, newinstr, cond
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9999: alternative_insn "\oldinstr", "\newinstr", \cond
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_ASM_EXTABLE 9999b, \label
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_asm_extable 9999b, \label
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.endm
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/*
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