tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 6eee8b9188fae0b31126a98baa2a545eafb40d6b commit: b7261a251299bfdababe53a848084af2ecfcc1ae [3316/3316] xcu: Add base NPU driver support config: x86_64-buildonly-randconfig-002-20251125 (https://download.01.org/0day-ci/archive/20251125/202511251246.qIzuARuC-lkp@i...) compiler: gcc-14 (Debian 14.2.0-19) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251125/202511251246.qIzuARuC-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/202511251246.qIzuARuC-lkp@intel.com/ All warnings (new ones prefixed by >>):

...

drivers/xcu/xcu_group.c:41:5: warning: no previous prototype for '__xcu_group_attach' [-Wmissing-prototypes] 41 | int __xcu_group_attach(struct xcu_group *new_group, | ^~~~~~~~~~~~~~~~~~

vim +/__xcu_group_attach +41 drivers/xcu/xcu_group.c 40

41 int __xcu_group_attach(struct xcu_group *new_group, 42 struct xcu_group *previous_group) 43 { 44 int id = new_group->id; 45 46 if (id == -1) 47 id = idr_alloc(&previous_group->next_layer, new_group, 0, 48 INT_MAX, GFP_KERNEL); 49 else 50 id = idr_alloc(&previous_group->next_layer, new_group, id, 51 id + 1, GFP_KERNEL); 52 53 if (id < 0) { 54 XSCHED_ERR("Fail to attach xcu_group: id conflict @ %s\n", 55 __func__); 56 return -EEXIST; 57 } 58 new_group->id = id; 59 new_group->previous_layer = previous_group; 60 61 return 0; 62 } 63

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