tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 196d330d7fb1e7cc0d85641c89ce4602cb36f12e commit: 01b94a9361680d6582dcc2a73a9eb464e0e40888 [4991/7526] drm/i915: include some drm headers only where needed config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20220224/202202240620.tqMKhkvP-lkp@xxxxxxxxx/config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=01b94a9361680d6582dcc2a73a9eb464e0e40888 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 01b94a9361680d6582dcc2a73a9eb464e0e40888 # save the config file to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> Note: the linux-next/master HEAD 196d330d7fb1e7cc0d85641c89ce4602cb36f12e builds fine. It may have been fixed somewhere. All errors (new ones prefixed by >>): drivers/gpu/drm/i915/gvt/kvmgt.c: In function 'handle_edid_regs': >> drivers/gpu/drm/i915/gvt/kvmgt.c:595:10: error: implicit declaration of function 'drm_edid_block_valid' [-Werror=implicit-function-declaration] 595 | if (!drm_edid_block_valid( | ^~~~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors vim +/drm_edid_block_valid +595 drivers/gpu/drm/i915/gvt/kvmgt.c b851adeac0858c Tina Zhang 2017-11-20 576 39c68e87bc50a7 Hang Yuan 2019-01-30 577 static int handle_edid_regs(struct intel_vgpu *vgpu, 39c68e87bc50a7 Hang Yuan 2019-01-30 578 struct vfio_edid_region *region, char *buf, 39c68e87bc50a7 Hang Yuan 2019-01-30 579 size_t count, u16 offset, bool is_write) 39c68e87bc50a7 Hang Yuan 2019-01-30 580 { 39c68e87bc50a7 Hang Yuan 2019-01-30 581 struct vfio_region_gfx_edid *regs = ®ion->vfio_edid_regs; 39c68e87bc50a7 Hang Yuan 2019-01-30 582 unsigned int data; 39c68e87bc50a7 Hang Yuan 2019-01-30 583 39c68e87bc50a7 Hang Yuan 2019-01-30 584 if (offset + count > sizeof(*regs)) 39c68e87bc50a7 Hang Yuan 2019-01-30 585 return -EINVAL; 39c68e87bc50a7 Hang Yuan 2019-01-30 586 39c68e87bc50a7 Hang Yuan 2019-01-30 587 if (count != 4) 39c68e87bc50a7 Hang Yuan 2019-01-30 588 return -EINVAL; 39c68e87bc50a7 Hang Yuan 2019-01-30 589 39c68e87bc50a7 Hang Yuan 2019-01-30 590 if (is_write) { 39c68e87bc50a7 Hang Yuan 2019-01-30 591 data = *((unsigned int *)buf); 39c68e87bc50a7 Hang Yuan 2019-01-30 592 switch (offset) { 39c68e87bc50a7 Hang Yuan 2019-01-30 593 case offsetof(struct vfio_region_gfx_edid, link_state): 39c68e87bc50a7 Hang Yuan 2019-01-30 594 if (data == VFIO_DEVICE_GFX_LINK_STATE_UP) { 39c68e87bc50a7 Hang Yuan 2019-01-30 @595 if (!drm_edid_block_valid( 39c68e87bc50a7 Hang Yuan 2019-01-30 596 (u8 *)region->edid_blob, 39c68e87bc50a7 Hang Yuan 2019-01-30 597 0, 39c68e87bc50a7 Hang Yuan 2019-01-30 598 true, 39c68e87bc50a7 Hang Yuan 2019-01-30 599 NULL)) { 39c68e87bc50a7 Hang Yuan 2019-01-30 600 gvt_vgpu_err("invalid EDID blob\n"); 39c68e87bc50a7 Hang Yuan 2019-01-30 601 return -EINVAL; 39c68e87bc50a7 Hang Yuan 2019-01-30 602 } 39c68e87bc50a7 Hang Yuan 2019-01-30 603 intel_gvt_ops->emulate_hotplug(vgpu, true); 39c68e87bc50a7 Hang Yuan 2019-01-30 604 } else if (data == VFIO_DEVICE_GFX_LINK_STATE_DOWN) 39c68e87bc50a7 Hang Yuan 2019-01-30 605 intel_gvt_ops->emulate_hotplug(vgpu, false); 39c68e87bc50a7 Hang Yuan 2019-01-30 606 else { 39c68e87bc50a7 Hang Yuan 2019-01-30 607 gvt_vgpu_err("invalid EDID link state %d\n", 39c68e87bc50a7 Hang Yuan 2019-01-30 608 regs->link_state); 39c68e87bc50a7 Hang Yuan 2019-01-30 609 return -EINVAL; 39c68e87bc50a7 Hang Yuan 2019-01-30 610 } 39c68e87bc50a7 Hang Yuan 2019-01-30 611 regs->link_state = data; 39c68e87bc50a7 Hang Yuan 2019-01-30 612 break; 39c68e87bc50a7 Hang Yuan 2019-01-30 613 case offsetof(struct vfio_region_gfx_edid, edid_size): 39c68e87bc50a7 Hang Yuan 2019-01-30 614 if (data > regs->edid_max_size) { 39c68e87bc50a7 Hang Yuan 2019-01-30 615 gvt_vgpu_err("EDID size is bigger than %d!\n", 39c68e87bc50a7 Hang Yuan 2019-01-30 616 regs->edid_max_size); 39c68e87bc50a7 Hang Yuan 2019-01-30 617 return -EINVAL; 39c68e87bc50a7 Hang Yuan 2019-01-30 618 } 39c68e87bc50a7 Hang Yuan 2019-01-30 619 regs->edid_size = data; 39c68e87bc50a7 Hang Yuan 2019-01-30 620 break; 39c68e87bc50a7 Hang Yuan 2019-01-30 621 default: 39c68e87bc50a7 Hang Yuan 2019-01-30 622 /* read-only regs */ 39c68e87bc50a7 Hang Yuan 2019-01-30 623 gvt_vgpu_err("write read-only EDID region at offset %d\n", 39c68e87bc50a7 Hang Yuan 2019-01-30 624 offset); 39c68e87bc50a7 Hang Yuan 2019-01-30 625 return -EPERM; 39c68e87bc50a7 Hang Yuan 2019-01-30 626 } 39c68e87bc50a7 Hang Yuan 2019-01-30 627 } else { 39c68e87bc50a7 Hang Yuan 2019-01-30 628 memcpy(buf, (char *)regs + offset, count); 39c68e87bc50a7 Hang Yuan 2019-01-30 629 } 39c68e87bc50a7 Hang Yuan 2019-01-30 630 39c68e87bc50a7 Hang Yuan 2019-01-30 631 return count; 39c68e87bc50a7 Hang Yuan 2019-01-30 632 } 39c68e87bc50a7 Hang Yuan 2019-01-30 633 :::::: The code at line 595 was first introduced by commit :::::: 39c68e87bc50a71bcfe93582d9b0673ef30db418 drm/i915/gvt: add VFIO EDID region :::::: TO: Hang Yuan <hang.yuan@xxxxxxxxxxxxxxx> :::::: CC: Zhenyu Wang <zhenyuw@xxxxxxxxxxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
