Hi Jia, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git OLK-5.10 head: 1588d318a9e388d05b6cf5e2a63134c8beb6a355 commit: af552f9d957def499065ed6e194bcd5f0c75dbc5 [3415/3415] irqchip/gic-v3-its: Move build_devid_pools from its to acpi iort init config: arm64-allnoconfig (https://download.01.org/0day-ci/archive/20251222/202512220941.znSG62CM-lkp@i...) compiler: aarch64-linux-gcc (GCC) 15.1.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251222/202512220941.znSG62CM-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/202512220941.znSG62CM-lkp@intel.com/ All warnings (new ones prefixed by >>):

...

drivers/irqchip/irq-gic-v3-its.c:504:6: warning: no previous prototype for 'build_devid_pools' [-Wmissing-prototypes] 504 | void build_devid_pools(void) | ^~~~~~~~~~~~~~~~~

vim +/build_devid_pools +504 drivers/irqchip/irq-gic-v3-its.c 500 501 /* 502 * Currently we only build *one* devid pool. 503 */

504 void build_devid_pools(void) 505 { 506 struct its_node *its; 507 508 its = list_first_entry(&its_nodes, struct its_node, entry); 509 if (readl_relaxed(its->base + GITS_IIDR) != 0x00051736) 510 return; 511 512 if (!probe_devid_pool_one()) 513 rsv_devid_pool_cap = true; 514 515 if (rsv_devid_pool_cap) 516 pr_info("ITS: reserved device id pools enabled\n"); 517 } 518

-- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki