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charset=us-ascii Content-Disposition: inline Hi Li, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 9d0af12b79bee784902822ddeec2e1a8cfc18524 commit: 5e3e94b1477ca3f6cb47ae8137a4a99fe0ef6147 [2392/15331] arm64: Add non nmi ipi backtrace support config: arm64-randconfig-003-20241027 (https://download.01.org/0day-ci/archive/20241028/202410280402.j2eHLE32-lkp@intel.com/config) compiler: aarch64-linux-gcc (GCC) 14.1.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241028/202410280402.j2eHLE32-lkp@intel.com/reproduce) 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 | Closes: https://lore.kernel.org/oe-kbuild-all/202410280402.j2eHLE32-lkp@intel.com/ All errors (new ones prefixed by >>): arch/arm64/kernel/ipi_nmi.c: In function 'ipi_cpu_backtrace': >> arch/arm64/kernel/ipi_nmi.c:39:9: error: implicit declaration of function '__printk_safe_enter' [-Wimplicit-function-declaration] 39 | __printk_safe_enter(); | ^~~~~~~~~~~~~~~~~~~ >> arch/arm64/kernel/ipi_nmi.c:41:9: error: implicit declaration of function '__printk_safe_exit' [-Wimplicit-function-declaration] 41 | __printk_safe_exit(); | ^~~~~~~~~~~~~~~~~~ vim +/__printk_safe_enter +39 arch/arm64/kernel/ipi_nmi.c 35 36 #ifdef CONFIG_NON_NMI_IPI_BACKTRACE 37 static void ipi_cpu_backtrace(void *info) 38 { > 39 __printk_safe_enter(); 40 nmi_cpu_backtrace(get_irq_regs()); > 41 __printk_safe_exit(); 42 } 43 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki