Messages in this thread Patch in this message | | | From | Nathan Chancellor <> | Subject | [PATCH] x86: Enable clang LTO for 32-bit as well | Date | Thu, 29 Apr 2021 16:26:12 -0700 |
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Commit b33fff07e3e3 ("x86, build: allow LTO to be selected") enabled support for LTO for x86_64 but 32-bit works fine as well.
I tested the following config combinations:
* i386_defconfig + CONFIG_LTO_CLANG_FULL=y
* i386_defconfig + CONFIG_LTO_CLANG_THIN=y
* ARCH=i386 allmodconfig + CONFIG_LTO_CLANG_THIN=y
with LLVM 11.1.0, 12.0.0, and 13.0.0 from git without any build failures. The defconfigs boot in QEMU with no new warnings.
Signed-off-by: Nathan Chancellor <nathan@kernel.org> --- arch/x86/Kconfig | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 0fc82237414d..d8a919d9535e 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -97,8 +97,8 @@ config X86 select ARCH_SUPPORTS_DEBUG_PAGEALLOC select ARCH_SUPPORTS_NUMA_BALANCING if X86_64 select ARCH_SUPPORTS_KMAP_LOCAL_FORCE_MAP if NR_CPUS <= 4096 - select ARCH_SUPPORTS_LTO_CLANG if X86_64 - select ARCH_SUPPORTS_LTO_CLANG_THIN if X86_64 + select ARCH_SUPPORTS_LTO_CLANG + select ARCH_SUPPORTS_LTO_CLANG_THIN select ARCH_USE_BUILTIN_BSWAP select ARCH_USE_QUEUED_RWLOCKS select ARCH_USE_QUEUED_SPINLOCKS base-commit: d8201efe75e13146ebde433745c7920e15593baf -- 2.31.1.362.g311531c9de
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