[kbuild-all] [intel-linux-intel-lts:5.4/yocto 17/24] drivers/gpu/drm/i915/gvt/acrngt.c:582:5: error: no previous prototype for 'acrngt_sysfs_init'

tree: https://github.com/intel/linux-intel-lts.git 5.4/yocto head: 8bbfe55bfdb2905c35914605bc1b4a4404d86649 commit: 7c10de4dfc3d5e6be6f087b28470fd2d5e51b313 [17/24] drm/i915/gvt: add acrngt support config: x86_64-allyesconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/intel/linux-intel-lts/commit/7c10de4dfc3d5e6be6f087b28... git remote add intel-linux-intel-lts https://github.com/intel/linux-intel-lts.git git fetch --no-tags intel-linux-intel-lts 5.4/yocto git checkout 7c10de4dfc3d5e6be6f087b28470fd2d5e51b313 # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): 582 | int acrngt_sysfs_init(struct intel_gvt *gvt) | ^~~~~~~~~~~~~~~~~ 616 | void acrngt_sysfs_del(void) | ^~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors vim +/acrngt_sysfs_init +582 drivers/gpu/drm/i915/gvt/acrngt.c 581 583 { 584 int ret; 585 586 acrn_gvt_kset = kset_create_and_add("gvt", NULL, kernel_kobj); 587 if (!acrn_gvt_kset) { 588 ret = -ENOMEM; 589 goto kset_fail; 590 } 591 592 acrn_gvt_ctrl_kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL); 593 if (!acrn_gvt_ctrl_kobj) { 594 ret = -ENOMEM; 595 goto ctrl_fail; 596 } 597 598 acrn_gvt_ctrl_kobj->kset = acrn_gvt_kset; 599 ret = kobject_init_and_add(acrn_gvt_ctrl_kobj, &acrngt_ctrl_ktype, 600 NULL, "control"); 601 if (ret) { 602 ret = -EINVAL; 603 goto kobj_fail; 604 } 605 606 return 0; 607 608 kobj_fail: 609 kobject_put(acrn_gvt_ctrl_kobj); 610 ctrl_fail: 611 kset_unregister(acrn_gvt_kset); 612 kset_fail: 613 return ret; 614 } 615 617 { 618 kobject_put(acrn_gvt_ctrl_kobj); 619 kset_unregister(acrn_gvt_kset); 620 } 621 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org