Hi Mukesh, kernel test robot noticed the following build warnings:
[auto build test WARNING on tip/x86/core] [also build test WARNING on linus/master v6.19 next-20260217] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Mukesh-R/x86-hyperv-Reserve-3-interrupt-vectors-used-exclusively-by-mshv/20260218-071406 base: tip/x86/core patch link: https://lore.kernel.org/r/20260217231158.1184736-1-mrathor%40linux.microsoft.com patch subject: [PATCH v2] x86/hyperv: Reserve 3 interrupt vectors used exclusively by mshv config: x86_64-rhel-9.4-ltp (https://download.01.org/0day-ci/archive/20260218/[email protected]/config) 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/20260218/[email protected]/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 <[email protected]> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/ All warnings (new ones prefixed by >>): >> arch/x86/kernel/cpu/mshyperv.c:485:13: warning: 'hv_reserve_irq_vectors' >> defined but not used [-Wunused-function] 485 | static void hv_reserve_irq_vectors(void) | ^~~~~~~~~~~~~~~~~~~~~~ vim +/hv_reserve_irq_vectors +485 arch/x86/kernel/cpu/mshyperv.c 480 481 /* 482 * Reserve vectors hard coded in the hypervisor. If used outside, the hypervisor 483 * will either crash or hang or attempt to break into debugger. 484 */ > 485 static void hv_reserve_irq_vectors(void) 486 { 487 #define HYPERV_DBG_FASTFAIL_VECTOR 0x29 488 #define HYPERV_DBG_ASSERT_VECTOR 0x2C 489 #define HYPERV_DBG_SERVICE_VECTOR 0x2D 490 491 if (cpu_feature_enabled(X86_FEATURE_FRED)) 492 return; 493 494 if (test_and_set_bit(HYPERV_DBG_ASSERT_VECTOR, system_vectors) || 495 test_and_set_bit(HYPERV_DBG_SERVICE_VECTOR, system_vectors) || 496 test_and_set_bit(HYPERV_DBG_FASTFAIL_VECTOR, system_vectors)) 497 BUG(); 498 499 pr_info("Hyper-V:reserve vectors: %d %d %d\n", HYPERV_DBG_ASSERT_VECTOR, 500 HYPERV_DBG_SERVICE_VECTOR, HYPERV_DBG_FASTFAIL_VECTOR); 501 } 502 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
