Dear contributor,

Our automatic CI has detected problems related to your patch(es). Please find some details below.

In tcwg_kernel/llvm-master-aarch64-mainline-allyesconfig, after:
  | commit llvmorg-23-init-8872-gfd11cf430e5a
  | Author: John Paul Jepko <john.jepko@ericsson.com>
  | Date:   Mon Mar 23 23:33:33 2026 -0500
  | 
  |     [clang] Extend -Wunused-but-set-variable to static globals (#178342)
  |     
  |     This PR extends the capability of -Wunused-but-set-variable to track and
  |     diagnose static global variables that are assigned values within a
  |     function but whose values are never used. This change complements
  | ... 6 lines of the commit log omitted.

Produces Failure:
  | Results changed to
  | # reset_artifacts:
  | -10
  | # build_abe binutils:
  | -9
  | # build_kernel_llvm:
  | -5
  | # build_abe qemu:
  | -2
  | # linux_n_obj:
  | 29
  | # First few build errors in logs:
  | # 00:07:12 scripts/dtc/dtc-lexer.lex.c:641:12: error: variable 'dts_version' set but not used [-Werror,-Wunused-but-set-variable]
  | # 00:07:12 make[2]: *** [scripts/Makefile.host:131: scripts/dtc/dtc-lexer.lex.o] Error 1
  | # 00:07:13 make[1]: *** [/home/tcwg-buildslave/workspace/tcwg_kernel_1/linux/Makefile:1593: scripts_dtc] Error 2
  | # 00:07:22 make: *** [Makefile:248: __sub-make] Error 2
  | 
  | From
  | # reset_artifacts:
  | -10
  | # build_abe binutils:
  | -9
  | # build_kernel_llvm:
  | -5
  | # build_abe qemu:
  | -2
  | # linux_n_obj:
  | 25020

Used configuration :
 tcwg_kernel/llvm-master-aarch64-mainline-allyesconfig

We track this bug report under https://linaro.atlassian.net/browse/LLVM-2204. Please let us know if you have a fix.

If you have any questions regarding this report, please ask on linaro-toolchain@lists.linaro.org mailing list.

-----------------8<--------------------------8<--------------------------8<--------------------------

The information below contains the details of the failures, and the ways to reproduce a debug environment:



Current build   : http://54.172.246.49:9090/jobs/tcwg_kernel--llvm-master-aarch64-mainline-allyesconfig-build/builds/609/archive/artifacts
Reference build : http://54.172.246.49:9090/jobs/tcwg_kernel--llvm-master-aarch64-mainline-allyesconfig-build/builds/608/archive/artifacts

Instruction to reproduce the build : https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/llvm/sha1/fd11cf430e5a9fd11f93bdcc929a1ce8dfa60f37/tcwg_kernel/llvm-master-aarch64-mainline-allyesconfig/reproduction_instructions.txt

Full commit : https://github.com/llvm/llvm-project/commit/fd11cf430e5a9fd11f93bdcc929a1ce8dfa60f37