[gvt-linux:gvt-next 19/26] drivers/gpu/drm/i915/gvt/scheduler.c:317:26: error: unused variable 'engine'

[kbuild test robot]

tree:   https://github.com/01org/gvt-linux.git gvt-next
head:   95cab1d8ede0429340e049fa8c445878404f3cfe
commit: 021a43f0b7a53fa334daba6d47f4d49ea04b4b1b [19/26] drm/i915/gvt: Separate cmd scan from request allocation
config: x86_64-randconfig-x004-201734 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        git checkout 021a43f0b7a53fa334daba6d47f4d49ea04b4b1b
        # save the attached .config to linux build tree
        make ARCH=x86_64 

Note: the gvt-linux/gvt-next HEAD 95cab1d8ede0429340e049fa8c445878404f3cfe builds fine.
      It only hurts bisectibility.

All errors (new ones prefixed by >>):

   drivers/gpu/drm/i915/gvt/scheduler.c: In function 'dispatch_workload':
>> drivers/gpu/drm/i915/gvt/scheduler.c:317:26: error: unused variable 'engine' [-Werror=unused-variable]
     struct intel_engine_cs *engine = dev_priv->engine[ring_id];
                             ^~~~~~
>> drivers/gpu/drm/i915/gvt/scheduler.c:315:27: error: unused variable 'shadow_ctx' [-Werror=unused-variable]
     struct i915_gem_context *shadow_ctx = workload->vgpu->shadow_ctx;
                              ^~~~~~~~~~
   cc1: all warnings being treated as errors

vim +/engine +317 drivers/gpu/drm/i915/gvt/scheduler.c

89ea20b9 Ping Gao       2017-06-29  311  
89ea20b9 Ping Gao       2017-06-29  312  static int dispatch_workload(struct intel_vgpu_workload *workload)
89ea20b9 Ping Gao       2017-06-29  313  {
89ea20b9 Ping Gao       2017-06-29  314  	int ring_id = workload->ring_id;
89ea20b9 Ping Gao       2017-06-29 @315  	struct i915_gem_context *shadow_ctx = workload->vgpu->shadow_ctx;
89ea20b9 Ping Gao       2017-06-29  316  	struct drm_i915_private *dev_priv = workload->vgpu->gvt->dev_priv;
89ea20b9 Ping Gao       2017-06-29 @317  	struct intel_engine_cs *engine = dev_priv->engine[ring_id];
89ea20b9 Ping Gao       2017-06-29  318  	int ret = 0;
89ea20b9 Ping Gao       2017-06-29  319  
89ea20b9 Ping Gao       2017-06-29  320  	gvt_dbg_sched("ring id %d prepare to dispatch workload %p\n",
89ea20b9 Ping Gao       2017-06-29  321  		ring_id, workload);
89ea20b9 Ping Gao       2017-06-29  322  
89ea20b9 Ping Gao       2017-06-29  323  	mutex_lock(&dev_priv->drm.struct_mutex);
89ea20b9 Ping Gao       2017-06-29  324  
89ea20b9 Ping Gao       2017-06-29  325  	ret = intel_gvt_scan_and_shadow_workload(workload);
e4734057 Zhi Wang       2016-05-01  326  	if (ret)
90d27a1b Pei Zhang      2016-11-14  327  		goto out;
e4734057 Zhi Wang       2016-05-01  328  
e4734057 Zhi Wang       2016-05-01  329  	if (workload->prepare) {
e4734057 Zhi Wang       2016-05-01  330  		ret = workload->prepare(workload);
e4734057 Zhi Wang       2016-05-01  331  		if (ret)
90d27a1b Pei Zhang      2016-11-14  332  			goto out;
e4734057 Zhi Wang       2016-05-01  333  	}
e4734057 Zhi Wang       2016-05-01  334  
90d27a1b Pei Zhang      2016-11-14  335  out:
90d27a1b Pei Zhang      2016-11-14  336  	if (ret)
e4734057 Zhi Wang       2016-05-01  337  		workload->status = ret;
e4734057 Zhi Wang       2016-05-01  338  
89ea20b9 Ping Gao       2017-06-29  339  	if (!IS_ERR_OR_NULL(workload->req)) {
89ea20b9 Ping Gao       2017-06-29  340  		gvt_dbg_sched("ring id %d submit workload to i915 %p\n",
89ea20b9 Ping Gao       2017-06-29  341  				ring_id, workload->req);
89ea20b9 Ping Gao       2017-06-29  342  		i915_add_request(workload->req);
89ea20b9 Ping Gao       2017-06-29  343  		workload->dispatched = true;
89ea20b9 Ping Gao       2017-06-29  344  	}
3cd23b82 Chuanxiao Dong 2017-03-16  345  
90d27a1b Pei Zhang      2016-11-14  346  	mutex_unlock(&dev_priv->drm.struct_mutex);
e4734057 Zhi Wang       2016-05-01  347  	return ret;
e4734057 Zhi Wang       2016-05-01  348  }
e4734057 Zhi Wang       2016-05-01  349  

:::::: The code at line 317 was first introduced by commit
:::::: 89ea20b930cb7372095645acae8928a75f7d5be5 drm/i915/gvt: Factor out scan and shadow from workload dispatch

:::::: TO: Ping Gao <ping.a.gao at intel.com>
:::::: CC: Zhenyu Wang <zhenyuw at linux.intel.com>

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
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