[reinette:resctrl/controls_rfc_v2.2 75/88] drivers/resctrl/mpam_resctrl.c:1016:19: error: 'hw_ctrl' undeclared

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/reinette/linux.git resctrl/controls_rfc_v2.2
head:   e53ef7bef436e58b8b4a1ef2337330bfd8588fd4
commit: 3407e523c988cfeea969aeb210ad64b2b2cd3642 [75/88] fs/resctrl: Introduce emulated controls and control mode
config: arm64-randconfig-004-20260816 (https://download.01.org/0day-ci/archive/20260816/[email protected]/config)
compiler: aarch64-linux-gcc (GCC) 10.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260816/[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 errors (new ones prefixed by >>):

   drivers/resctrl/mpam_resctrl.c: In function 'mpam_resctrl_control_init':
>> drivers/resctrl/mpam_resctrl.c:1016:19: error: 'hw_ctrl' undeclared (first use in this function)
    1016 |   INIT_LIST_HEAD(&hw_ctrl->r_ctrl.emulated_by);
         |                   ^~~~~~~
   drivers/resctrl/mpam_resctrl.c:1016:19: note: each undeclared identifier is reported only once for each function it appears in


vim +/hw_ctrl +1016 drivers/resctrl/mpam_resctrl.c

   998	
   999	static int mpam_resctrl_control_init(struct mpam_resctrl_res *res)
  1000	{
  1001		struct mpam_class *class = res->class;
  1002		struct mpam_props *cprops = &class->props;
  1003		struct rdt_resource *r = &res->resctrl_res;
  1004		struct mpam_resctrl_ctrl *mpam_ctrl;
  1005	
  1006		mpam_ctrl = kzalloc_obj(*mpam_ctrl);
  1007		if (!mpam_ctrl)
  1008			return -ENOMEM;
  1009	
  1010		switch (r->rid) {
  1011		case RDT_RESOURCE_L2:
  1012		case RDT_RESOURCE_L3:
  1013			mpam_ctrl->r_ctrl.type = RESCTRL_CTRL_BITMAP;
  1014			mpam_ctrl->r_ctrl.name = RESCTRL_CTRL_NAME_DEF;
  1015			INIT_LIST_HEAD_RCU(&mpam_ctrl->r_ctrl.domains);
> 1016			INIT_LIST_HEAD(&hw_ctrl->r_ctrl.emulated_by);
  1017			__set_bit(RESCTRL_BITMAP_FLAG_SPARSE, mpam_ctrl->r_ctrl.bitmap.flags);
  1018			mpam_ctrl->r_ctrl.bitmap.cbm_len = class->props.cpbm_wd;
  1019			/* mpam_devices will reject empty bitmaps */
  1020			mpam_ctrl->r_ctrl.bitmap.min_cbm_bits = 1;
  1021	
  1022			if (r->rid == RDT_RESOURCE_L2) {
  1023				r->name = "L2";
  1024				r->ctrl_scope = RESCTRL_L2_CACHE;
  1025				r->cdp_capable = true;
  1026			} else {
  1027				r->name = "L3";
  1028				r->ctrl_scope = RESCTRL_L3_CACHE;
  1029				r->cdp_capable = true;
  1030			}
  1031	
  1032			/*
  1033			 * Which bits are shared with other ...things...  Unknown
  1034			 * devices use partid-0 which uses all the bitmap fields. Until
  1035			 * we have configured the SMMU and GIC not to do this 'all the
  1036			 * bits' is the correct answer here.
  1037			 */
  1038			mpam_ctrl->r_ctrl.bitmap.shareable_bits = resctrl_get_default_ctrlval(&mpam_ctrl->r_ctrl);
  1039			list_add(&mpam_ctrl->r_ctrl.entry, &r->controls);
  1040			r->alloc_capable = true;
  1041			break;
  1042		case RDT_RESOURCE_MBA:
  1043			r->ctrl_scope = RESCTRL_L3_CACHE;
  1044			mpam_ctrl->r_ctrl.type = RESCTRL_CTRL_SCALAR;
  1045			mpam_ctrl->r_ctrl.name = RESCTRL_CTRL_NAME_DEF;
  1046			INIT_LIST_HEAD_RCU(&mpam_ctrl->r_ctrl.domains);
  1047			INIT_LIST_HEAD(&hw_ctrl->r_ctrl.emulated_by);
  1048	
  1049			r->bw_throttle_mode = THREAD_THROTTLE_UNDEFINED;
  1050			__set_bit(RESCTRL_SCALAR_FLAG_LINEAR, mpam_ctrl->r_ctrl.scalar.flags);
  1051			mpam_ctrl->r_ctrl.scalar.min = get_mba_min(cprops);
  1052			mpam_ctrl->r_ctrl.scalar.max = MAX_MBA_BW;
  1053			mpam_ctrl->r_ctrl.scalar.reset_val = MAX_MBA_BW;
  1054			mpam_ctrl->r_ctrl.scalar.gran = get_mba_granularity(cprops);
  1055			list_add(&mpam_ctrl->r_ctrl.entry, &r->controls);
  1056	
  1057			r->name = "MB";
  1058			r->alloc_capable = true;
  1059			break;
  1060		default:
  1061			return -EINVAL;
  1062		}
  1063	
  1064		return 0;
  1065	}
  1066	

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