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| author | Sami Tolvanen <samitolvanen@google.com> | 2020-07-30 08:37:01 -0700 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-07-30 16:50:14 +0100 |
| commit | 966a0acce2fca776391823381dba95c40e03c339 (patch) | |
| tree | ea0efd25c696862436ebf2a5c21d032fc161ec35 | |
| parent | 7b7891c7bdfd61fc9ed6747a0a05efe2394dddc6 (diff) | |
| download | ide-966a0acce2fca776391823381dba95c40e03c339.tar.gz | |
arm64/alternatives: move length validation inside the subsection
Commit f7b93d42945c ("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: f7b93d42945c ("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>
| -rw-r--r-- | arch/arm64/include/asm/alternative.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm64/include/asm/alternative.h b/arch/arm64/include/asm/alternative.h index 12f0eb56a1cc30..619db9b4c9d5c0 100644 --- a/arch/arm64/include/asm/alternative.h +++ b/arch/arm64/include/asm/alternative.h @@ -77,9 +77,9 @@ static inline void apply_alternatives_module(void *start, size_t length) { } "663:\n\t" \ newinstr "\n" \ "664:\n\t" \ - ".previous\n\t" \ ".org . - (664b-663b) + (662b-661b)\n\t" \ - ".org . - (662b-661b) + (664b-663b)\n" \ + ".org . - (662b-661b) + (664b-663b)\n\t" \ + ".previous\n" \ ".endif\n" #define __ALTERNATIVE_CFG_CB(oldinstr, feature, cfg_enabled, cb) \ |