tree: git://anongit.freedesktop.org/drm/drm-misc drm-misc-next head: f30946db159feddf8c89bdeeb79ff893d949d480 commit: 404046cf48050167bc068bd12fdd2cbce61022c3 [3/5] drm/nouveau/mmu/gp100-: drop unneeded assignment in the if condition. config: arc-allyesconfig (attached as .config) compiler: arceb-elf-gcc (GCC) 11.2.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git remote add drm-misc git://anongit.freedesktop.org/drm/drm-misc git fetch --no-tags drm-misc drm-misc-next git checkout 404046cf48050167bc068bd12fdd2cbce61022c3 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=arc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Note: the drm-misc/drm-misc-next HEAD 381ba6a6baf104b572379c6b2deab884555104d4 builds fine. It only hurts bisectability. All errors (new ones prefixed by >>): drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgp100.c: In function 'gp100_vmm_fault_cancel': 491 | u32 inst, aper; | ^~~~ cc1: all warnings being treated as errors vim +/inst +491 drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgp100.c f9400afb1e11c33 Ben Skeggs 2017-11-01 482 71871aa6df5009e Ben Skeggs 2018-07-09 483 static int 71871aa6df5009e Ben Skeggs 2018-07-09 484 gp100_vmm_fault_cancel(struct nvkm_vmm *vmm, void *argv, u32 argc) 71871aa6df5009e Ben Skeggs 2018-07-09 485 { 71871aa6df5009e Ben Skeggs 2018-07-09 486 struct nvkm_device *device = vmm->mmu->subdev.device; 71871aa6df5009e Ben Skeggs 2018-07-09 487 union { 71871aa6df5009e Ben Skeggs 2018-07-09 488 struct gp100_vmm_fault_cancel_v0 v0; 71871aa6df5009e Ben Skeggs 2018-07-09 489 } *args = argv; 71871aa6df5009e Ben Skeggs 2018-07-09 490 int ret = -ENOSYS; 71871aa6df5009e Ben Skeggs 2018-07-09 @491 u32 inst, aper; 71871aa6df5009e Ben Skeggs 2018-07-09 492 71871aa6df5009e Ben Skeggs 2018-07-09 493 if ((ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) 71871aa6df5009e Ben Skeggs 2018-07-09 494 return ret; 71871aa6df5009e Ben Skeggs 2018-07-09 495 71871aa6df5009e Ben Skeggs 2018-07-09 496 /* Translate MaxwellFaultBufferA instance pointer to the same 71871aa6df5009e Ben Skeggs 2018-07-09 497 * format as the NV_GR_FECS_CURRENT_CTX register. 71871aa6df5009e Ben Skeggs 2018-07-09 498 */ 71871aa6df5009e Ben Skeggs 2018-07-09 499 aper = (args->v0.inst >> 8) & 3; 71871aa6df5009e Ben Skeggs 2018-07-09 500 args->v0.inst >>= 12; 71871aa6df5009e Ben Skeggs 2018-07-09 501 args->v0.inst |= aper << 28; 71871aa6df5009e Ben Skeggs 2018-07-09 502 args->v0.inst |= 0x80000000; 71871aa6df5009e Ben Skeggs 2018-07-09 503 71871aa6df5009e Ben Skeggs 2018-07-09 504 if (!WARN_ON(nvkm_gr_ctxsw_pause(device))) { 404046cf4805016 Luo penghao 2021-08-20 505 if (nvkm_gr_ctxsw_inst(device) == args->v0.inst) { 71871aa6df5009e Ben Skeggs 2018-07-09 506 gf100_vmm_invalidate(vmm, 0x0000001b 71871aa6df5009e Ben Skeggs 2018-07-09 507 /* CANCEL_TARGETED. */ | 71871aa6df5009e Ben Skeggs 2018-07-09 508 (args->v0.hub << 20) | 71871aa6df5009e Ben Skeggs 2018-07-09 509 (args->v0.gpc << 15) | 71871aa6df5009e Ben Skeggs 2018-07-09 510 (args->v0.client << 9)); 71871aa6df5009e Ben Skeggs 2018-07-09 511 } 71871aa6df5009e Ben Skeggs 2018-07-09 512 WARN_ON(nvkm_gr_ctxsw_resume(device)); 71871aa6df5009e Ben Skeggs 2018-07-09 513 } 71871aa6df5009e Ben Skeggs 2018-07-09 514 71871aa6df5009e Ben Skeggs 2018-07-09 515 return 0; 71871aa6df5009e Ben Skeggs 2018-07-09 516 } 71871aa6df5009e Ben Skeggs 2018-07-09 517 :::::: The code at line 491 was first introduced by commit :::::: 71871aa6df5009ebf39ae94d15d0e9836bf91c03 drm/nouveau/mmu/gp100-: add privileged methods for fault replay/cancel :::::: TO: Ben Skeggs <bskeggs(a)redhat.com&gt; :::::: CC: Ben Skeggs <bskeggs(a)redhat.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org