arm64/alternatives: move length validation inside the subsection
[ Upstream commit5.4-rM2-2.2.x-imx-squashed966a0acce2
] Commitf7b93d4294
("arm64/alternatives: use subsections for replacement sequences") breaks LLVM's integrated assembler, because due to its one-pass design, it cannot compute instruction sequence lengths before the layout for the subsection has been finalized. This change fixes the build by moving the .org directives inside the subsection, so they are processed after the subsection layout is known. Fixes:f7b93d4294
("arm64/alternatives: use subsections for replacement sequences") Signed-off-by: Sami Tolvanen <samitolvanen@google.com> Link: https://github.com/ClangBuiltLinux/linux/issues/1078 Link: https://lore.kernel.org/r/20200730153701.3892953-1-samitolvanen@google.com Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -77,9 +77,9 @@ static inline void apply_alternatives_module(void *start, size_t length) { }
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"663:\n\t" \
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newinstr "\n" \
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"664:\n\t" \
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".previous\n\t" \
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".org . - (664b-663b) + (662b-661b)\n\t" \
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".org . - (662b-661b) + (664b-663b)\n" \
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".org . - (662b-661b) + (664b-663b)\n\t" \
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".previous\n" \
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".endif\n"
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#define __ALTERNATIVE_CFG_CB(oldinstr, feature, cfg_enabled, cb) \
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