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| author | Ilie Halip <ilie.halip@gmail.com> | 2020-03-20 00:45:28 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-04-02 16:28:24 +0300 |
| commit | 49275ad17f1a168f5b29ebd3832373cc0206d164 (patch) | |
| tree | 2444e3544ec57bb59d3af09dd665ba9de8cd6057 /arch | |
| parent | 9b3503810c7362807457206687a5b1511b0cc77d (diff) | |
| download | linux-49275ad17f1a168f5b29ebd3832373cc0206d164.tar.xz | |
arm64: alternative: fix build with clang integrated assembler
commit 6f5459da2b8736720afdbd67c4bd2d1edba7d0e3 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: 290622efc76e ("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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/include/asm/alternative.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/alternative.h b/arch/arm64/include/asm/alternative.h index 887a8512bf10..1a7ba3de7079 100644 --- a/arch/arm64/include/asm/alternative.h +++ b/arch/arm64/include/asm/alternative.h @@ -221,7 +221,7 @@ alternative_endif .macro user_alt, label, oldinstr, newinstr, cond 9999: alternative_insn "\oldinstr", "\newinstr", \cond - _ASM_EXTABLE 9999b, \label + _asm_extable 9999b, \label .endm /* |