Hi caijian, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 04473ee9ed912a16fff0d8846ad565bbf3d63c77 commit: c6ce2becb89528f83c1ad3c0607ad05baecebc0a [3544/3544] arm64/cpufeature: Fix pseudo nmi identifier undeclaration complilation error config: arm64-defconfig (https://download.01.org/0day-ci/archive/20251220/202512202332.cPVupLsK-lkp@i...) compiler: aarch64-linux-gcc (GCC) 15.1.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251220/202512202332.cPVupLsK-lkp@i...) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202512202332.cPVupLsK-lkp@intel.com/ All warnings (new ones prefixed by >>):

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arch/arm64/kernel/cpufeature.c:2129:13: warning: 'enable_pseudo_nmi' defined but not used [-Wunused-variable] 2129 | static bool enable_pseudo_nmi; | ^~~~~~~~~~~~~~~~~

vim +/enable_pseudo_nmi +2129 arch/arm64/kernel/cpufeature.c 3e6c69a058deaa Mark Brown 2019-12-09 2127 f72387e1f8bc99 Mark Brown 2022-11-03 2128 #if IS_ENABLED(CONFIG_ARM64_PSEUDO_NMI) || IS_ENABLED(CONFIG_ARM64_NMI) bc3c03ccb4641f Julien Thierry 2019-01-31 @2129 static bool enable_pseudo_nmi; f72387e1f8bc99 Mark Brown 2022-11-03 2130 #endif bc3c03ccb4641f Julien Thierry 2019-01-31 2131 :::::: The code at line 2129 was first introduced by commit :::::: bc3c03ccb4641fb940b27a0d369431876923a8fe arm64: Enable the support of pseudo-NMIs :::::: TO: Julien Thierry <julien.thierry@arm.com> :::::: CC: Catalin Marinas <catalin.marinas@arm.com> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki