Regressions on x86_64 config LTO_CLANG_FULL with korg-clang-20 and clang-nightly on the Linux next-20250407 and found again on next-20250414 tag

First seen on the next-20250407. Bad: next-20250407 and next-20250414 Good:next-20250404

* x86_64, Build - Build/korg-clang-20-lkftconfig-lto-full - Build/clang-nightly-lkftconfig-lto-full

Regression Analysis: - New regression? Yes - Reproducibility? Yes

Build regression: x86_64 clang-20 clang-nightly config lto-full failed

Reported-by: Linux Kernel Functional Testing lkft@linaro.org

## Build log ld.lld: error: linking module flags 'Code Model': IDs have conflicting values: 'i32 1' from vmlinux.a(gdt_idt.o at 1321040), and 'i32 2' from ld-temp.o

Clang-20 versions: "name": "clang", "version": "20.1.2", "version_full": "ClangBuiltLinux clang version 20.1.2 (https://github.com/llvm/llvm-project.git 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247)"

Clang-nightly versions: "name": "clang", "version": "21.0.0", "version_full": "Debian clang version 21.0.0 (++20250402105505+c57b9c233a87-1~exp1~20250402225526.1363)"

## Source * Kernel version: 6.15.0-rc2 * Git tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git * Git sha: b425262c07a6a643ebeed91046e161e20b944164 * Git describe: next-20250414 * Project details: https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20250414/

## Test * Test log: https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20250407/tes... * Test details: https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20250414/tes... * Test history: https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20250414/tes... * Test history: https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20250414/tes... * Build link: https://storage.tuxsuite.com/public/linaro/lkft/builds/2viBgnFQjsmdmrsmASvly... * Kernel config: https://storage.tuxsuite.com/public/linaro/lkft/builds/2viBgnFQjsmdmrsmASvly...

## Steps to reproduce # tuxmake --runtime podman --target-arch x86_64 --toolchain korg-clang-20 \ --kconfig defconfig --kconfig-add CONFIG_DEBUG_INFO_REDUCED=y \ --kconfig-add CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y \ --kconfig-add CONFIG_IGB=y \ --kconfig-add CONFIG_LTO_CLANG_FULL=y LLVM=1 LLVM_IAS=1

-- Linaro LKFT https://lkft.linaro.org