Regressions on arm64 defconfig build failed with gcc-8 on the Linux next tag next-20250512 and next-20250522.

First seen on the next-20250512 Good: next-20250509 Bad: next-20250512

Regressions found on arm64: - build/gcc-8-defconfig

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

Build regression: arm64 gcc-8 defconfig call to '__field_overflow' declared with attribute error value doesn't fit into mask

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

## Build log ----- In file included from arch/arm64/include/asm/sysreg.h:1107, from arch/arm64/include/asm/cputype.h:248, from arch/arm64/include/asm/cache.h:43, from include/vdso/cache.h:5, from include/linux/cache.h:6, from include/linux/time.h:5, from include/linux/skbuff.h:15, from include/linux/if_ether.h:19, from include/linux/ieee80211.h:19, from drivers/net/wireless/intel/iwlwifi/iwl-trans.h:10, from drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info.c:6: In function 'u32_encode_bits', inlined from 'iwl_pcie_ctxt_info_init' at drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info.c:208:3: include/linux/bitfield.h:195:3: error: call to '__field_overflow' declared with attribute error: value doesn't fit into mask __field_overflow(); \ ^~~~~~~~~~~~~~~~~~ include/linux/bitfield.h:215:2: note: in expansion of macro '____MAKE_OP' ____MAKE_OP(u##size,u##size,,) ^~~~~~~~~~~ include/linux/bitfield.h:218:1: note: in expansion of macro '__MAKE_OP' __MAKE_OP(32) ^~~~~~~~~

## Source * Kernel version: 6.15.0-rc7 * Git tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/next/linux-next.git * Git sha: 460178e842c7a1e48a06df684c66eb5fd630bcf7 * Git describe: next-20250522

## Build * Build log: https://qa-reports.linaro.org/api/testruns/28517069/log_file/ * Build history: https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20250522/tes... * Build link: https://storage.tuxsuite.com/public/linaro/lkft/builds/2xRo9LbWebbQqL9EYIT8o... * Kernel config: https://storage.tuxsuite.com/public/linaro/lkft/builds/2xRo9LbWebbQqL9EYIT8o...

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