[Intel-gfx] [PATCH 03/12] drm/i915: Use insert_page for pwrite_fast

kbuild test robot lkp at intel.com
Wed Apr 20 13:01:36 UTC 2016


Hi,

[auto build test WARNING on drm-intel/for-linux-next]
[also build test WARNING on next-20160420]
[cannot apply to v4.6-rc4]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/ankitprasad-r-sharma-intel-com/Support-for-creating-using-Stolen-memory-backed-objects/20160420-194608
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
reproduce: make htmldocs

All warnings (new ones prefixed by >>):

   include/drm/drm_crtc.h:1549: warning: No description found for parameter 'helper_private'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'tile_idr'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'connector_ida'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'delayed_event'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'edid_property'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'dpms_property'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'path_property'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'tile_property'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'plane_type_property'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'rotation_property'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'prop_src_x'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'prop_src_y'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'prop_src_w'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'prop_src_h'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'prop_crtc_x'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'prop_crtc_y'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'prop_crtc_w'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'prop_crtc_h'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'prop_fb_id'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'prop_crtc_id'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'prop_active'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'prop_mode_id'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'dvi_i_subconnector_property'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'dvi_i_select_subconnector_property'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'tv_subconnector_property'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'tv_select_subconnector_property'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'tv_mode_property'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'tv_left_margin_property'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'tv_right_margin_property'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'tv_top_margin_property'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'tv_bottom_margin_property'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'tv_brightness_property'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'tv_contrast_property'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'tv_flicker_reduction_property'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'tv_overscan_property'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'tv_saturation_property'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'tv_hue_property'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'scaling_mode_property'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'aspect_ratio_property'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'dirty_info_property'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'suggested_x_property'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'suggested_y_property'
   include/drm/drm_crtc.h:2185: warning: No description found for parameter 'allow_fb_modifiers'
   drivers/gpu/drm/drm_atomic_helper.c:2913: warning: No description found for parameter 'start'
   drivers/gpu/drm/drm_atomic_helper.c:2913: warning: No description found for parameter 'start'
   drivers/gpu/drm/drm_atomic_helper.c:2913: warning: No description found for parameter 'start'
   drivers/gpu/drm/drm_atomic_helper.c:2913: warning: No description found for parameter 'start'
   include/drm/drm_dp_helper.h:749: warning: No description found for parameter 'i2c_nack_count'
   include/drm/drm_dp_helper.h:749: warning: No description found for parameter 'i2c_defer_count'
   drivers/gpu/drm/drm_dp_mst_topology.c:2356: warning: No description found for parameter 'connector'
   include/drm/drm_dp_mst_helper.h:92: warning: No description found for parameter 'cached_edid'
   include/drm/drm_dp_mst_helper.h:92: warning: No description found for parameter 'has_audio'
   include/drm/drm_dp_mst_helper.h:466: warning: No description found for parameter 'max_dpcd_transaction_bytes'
   include/drm/drm_dp_mst_helper.h:466: warning: No description found for parameter 'sink_count'
   include/drm/drm_dp_mst_helper.h:466: warning: No description found for parameter 'total_slots'
   include/drm/drm_dp_mst_helper.h:466: warning: No description found for parameter 'avail_slots'
   include/drm/drm_dp_mst_helper.h:466: warning: No description found for parameter 'total_pbn'
   include/drm/drm_dp_mst_helper.h:466: warning: No description found for parameter 'qlock'
   include/drm/drm_dp_mst_helper.h:466: warning: No description found for parameter 'tx_msg_downq'
   include/drm/drm_dp_mst_helper.h:466: warning: No description found for parameter 'tx_down_in_progress'
   include/drm/drm_dp_mst_helper.h:466: warning: No description found for parameter 'payload_lock'
   include/drm/drm_dp_mst_helper.h:466: warning: No description found for parameter 'proposed_vcpis'
   include/drm/drm_dp_mst_helper.h:466: warning: No description found for parameter 'payloads'
   include/drm/drm_dp_mst_helper.h:466: warning: No description found for parameter 'payload_mask'
   include/drm/drm_dp_mst_helper.h:466: warning: No description found for parameter 'vcpi_mask'
   include/drm/drm_dp_mst_helper.h:466: warning: No description found for parameter 'tx_waitq'
   include/drm/drm_dp_mst_helper.h:466: warning: No description found for parameter 'work'
   include/drm/drm_dp_mst_helper.h:466: warning: No description found for parameter 'tx_work'
   include/drm/drm_dp_mst_helper.h:466: warning: No description found for parameter 'destroy_connector_list'
   include/drm/drm_dp_mst_helper.h:466: warning: No description found for parameter 'destroy_connector_lock'
   include/drm/drm_dp_mst_helper.h:466: warning: No description found for parameter 'destroy_connector_work'
   drivers/gpu/drm/drm_dp_mst_topology.c:2356: warning: No description found for parameter 'connector'
   drivers/gpu/drm/drm_irq.c:176: warning: No description found for parameter 'flags'
   include/drm/drmP.h:168: warning: No description found for parameter 'fmt'
   include/drm/drmP.h:184: warning: No description found for parameter 'fmt'
   include/drm/drmP.h:202: warning: No description found for parameter 'fmt'
   include/drm/drmP.h:247: warning: No description found for parameter 'dev'
   include/drm/drmP.h:247: warning: No description found for parameter 'data'
   include/drm/drmP.h:247: warning: No description found for parameter 'file_priv'
   include/drm/drmP.h:280: warning: No description found for parameter 'ioctl'
   include/drm/drmP.h:280: warning: No description found for parameter '_func'
   include/drm/drmP.h:280: warning: No description found for parameter '_flags'
   include/drm/drmP.h:362: warning: cannot understand function prototype: 'struct drm_lock_data '
   include/drm/drmP.h:415: warning: cannot understand function prototype: 'struct drm_driver '
   include/drm/drmP.h:672: warning: cannot understand function prototype: 'struct drm_info_list '
   include/drm/drmP.h:682: warning: cannot understand function prototype: 'struct drm_info_node '
   include/drm/drmP.h:692: warning: cannot understand function prototype: 'struct drm_minor '
   include/drm/drmP.h:740: warning: cannot understand function prototype: 'struct drm_device '
   drivers/gpu/drm/i915/intel_runtime_pm.c:2391: warning: No description found for parameter 'resume'
   drivers/gpu/drm/i915/intel_runtime_pm.c:2391: warning: No description found for parameter 'resume'
   drivers/gpu/drm/i915/i915_irq.c:2722: warning: No description found for parameter 'fmt'
   drivers/gpu/drm/i915/i915_irq.c:2722: warning: No description found for parameter 'fmt'
   drivers/gpu/drm/i915/i915_irq.c:2722: warning: No description found for parameter 'fmt'
   drivers/gpu/drm/i915/i915_irq.c:2722: warning: No description found for parameter 'fmt'
   drivers/gpu/drm/i915/i915_gem.c:434: warning: No description found for parameter 'dev'
   drivers/gpu/drm/i915/i915_gem.c:434: warning: No description found for parameter 'data'
   drivers/gpu/drm/i915/i915_gem.c:434: warning: No description found for parameter 'file'
   drivers/gpu/drm/i915/i915_gem.c:699: warning: No description found for parameter 'dev'
   drivers/gpu/drm/i915/i915_gem.c:699: warning: No description found for parameter 'data'
   drivers/gpu/drm/i915/i915_gem.c:699: warning: No description found for parameter 'file'
>> drivers/gpu/drm/i915/i915_gem.c:780: warning: No description found for parameter 'i915'
   drivers/gpu/drm/i915/i915_gem.c:780: warning: No description found for parameter 'obj'
   drivers/gpu/drm/i915/i915_gem.c:780: warning: No description found for parameter 'args'
   drivers/gpu/drm/i915/i915_gem.c:780: warning: No description found for parameter 'file'
   drivers/gpu/drm/i915/i915_gem.c:1071: warning: No description found for parameter 'dev'
   drivers/gpu/drm/i915/i915_gem.c:1071: warning: No description found for parameter 'data'
   drivers/gpu/drm/i915/i915_gem.c:1071: warning: No description found for parameter 'file'
   drivers/gpu/drm/i915/i915_gem.c:1277: warning: No description found for parameter 'rps'
   drivers/gpu/drm/i915/i915_gem.c:1492: warning: No description found for parameter 'req'
   drivers/gpu/drm/i915/i915_gem.c:1516: warning: No description found for parameter 'obj'
   drivers/gpu/drm/i915/i915_gem.c:1516: warning: No description found for parameter 'readonly'
   drivers/gpu/drm/i915/i915_gem.c:1632: warning: No description found for parameter 'dev'
   drivers/gpu/drm/i915/i915_gem.c:1632: warning: No description found for parameter 'data'
   drivers/gpu/drm/i915/i915_gem.c:1632: warning: No description found for parameter 'file'
   drivers/gpu/drm/i915/i915_gem.c:1695: warning: No description found for parameter 'dev'
   drivers/gpu/drm/i915/i915_gem.c:1695: warning: No description found for parameter 'data'
   drivers/gpu/drm/i915/i915_gem.c:1695: warning: No description found for parameter 'file'
   drivers/gpu/drm/i915/i915_gem.c:1740: warning: No description found for parameter 'dev'
   drivers/gpu/drm/i915/i915_gem.c:1740: warning: No description found for parameter 'data'
   drivers/gpu/drm/i915/i915_gem.c:1740: warning: No description found for parameter 'file'
   drivers/gpu/drm/i915/i915_gem.c:2045: warning: No description found for parameter 'dev'
   drivers/gpu/drm/i915/i915_gem.c:2045: warning: No description found for parameter 'size'
   drivers/gpu/drm/i915/i915_gem.c:2045: warning: No description found for parameter 'tiling_mode'
   drivers/gpu/drm/i915/i915_gem.c:2045: warning: No description found for parameter 'fenced'
   drivers/gpu/drm/i915/i915_gem.c:2045: warning: Excess function parameter 'obj' description in 'i915_gem_get_gtt_alignment'
   drivers/gpu/drm/i915/i915_gem.c:3002: warning: No description found for parameter 'engine'
   drivers/gpu/drm/i915/i915_gem.c:3128: warning: No description found for parameter 'obj'
   drivers/gpu/drm/i915/i915_gem.c:3178: warning: No description found for parameter 'dev'
   drivers/gpu/drm/i915/i915_gem.c:3178: warning: No description found for parameter 'data'
   drivers/gpu/drm/i915/i915_gem.c:3178: warning: No description found for parameter 'file'
   drivers/gpu/drm/i915/i915_gem.c:3178: warning: Excess function parameter 'DRM_IOCTL_ARGS' description in 'i915_gem_wait_ioctl'
   drivers/gpu/drm/i915/i915_gem.c:3540: warning: No description found for parameter 'obj'
   drivers/gpu/drm/i915/i915_gem.c:3540: warning: No description found for parameter 'vm'
   drivers/gpu/drm/i915/i915_gem.c:3540: warning: No description found for parameter 'ggtt_view'
   drivers/gpu/drm/i915/i915_gem.c:3540: warning: No description found for parameter 'alignment'
   drivers/gpu/drm/i915/i915_gem.c:3540: warning: No description found for parameter 'flags'
   drivers/gpu/drm/i915/i915_gem.c:3796: warning: No description found for parameter 'obj'
   drivers/gpu/drm/i915/i915_gem.c:3796: warning: No description found for parameter 'write'
   drivers/gpu/drm/i915/i915_gem.c:3874: warning: No description found for parameter 'obj'
   drivers/gpu/drm/i915/i915_gem.c:3874: warning: No description found for parameter 'cache_level'
   drivers/gpu/drm/i915/i915_gem.c:4148: warning: No description found for parameter 'obj'
   drivers/gpu/drm/i915/i915_gem.c:4148: warning: No description found for parameter 'write'
   drivers/gpu/drm/i915/i915_cmd_parser.c:748: warning: No description found for parameter 'engine'
   drivers/gpu/drm/i915/i915_cmd_parser.c:748: warning: Excess function parameter 'ring' description in 'i915_cmd_parser_init_ring'
   drivers/gpu/drm/i915/i915_cmd_parser.c:838: warning: No description found for parameter 'engine'
   drivers/gpu/drm/i915/i915_cmd_parser.c:838: warning: Excess function parameter 'ring' description in 'i915_cmd_parser_fini_ring'
   drivers/gpu/drm/i915/i915_cmd_parser.c:1034: warning: No description found for parameter 'engine'
   drivers/gpu/drm/i915/i915_cmd_parser.c:1034: warning: Excess function parameter 'ring' description in 'i915_needs_cmd_parser'
   drivers/gpu/drm/i915/i915_cmd_parser.c:1186: warning: No description found for parameter 'engine'
   drivers/gpu/drm/i915/i915_cmd_parser.c:1186: warning: Excess function parameter 'ring' description in 'i915_parse_cmds'
   drivers/gpu/drm/i915/i915_cmd_parser.c:748: warning: No description found for parameter 'engine'
   drivers/gpu/drm/i915/i915_cmd_parser.c:748: warning: Excess function parameter 'ring' description in 'i915_cmd_parser_init_ring'
   drivers/gpu/drm/i915/i915_cmd_parser.c:838: warning: No description found for parameter 'engine'
   drivers/gpu/drm/i915/i915_cmd_parser.c:838: warning: Excess function parameter 'ring' description in 'i915_cmd_parser_fini_ring'
   drivers/gpu/drm/i915/i915_cmd_parser.c:1034: warning: No description found for parameter 'engine'
   drivers/gpu/drm/i915/i915_cmd_parser.c:1034: warning: Excess function parameter 'ring' description in 'i915_needs_cmd_parser'
   drivers/gpu/drm/i915/i915_cmd_parser.c:1186: warning: No description found for parameter 'engine'
   drivers/gpu/drm/i915/i915_cmd_parser.c:1186: warning: Excess function parameter 'ring' description in 'i915_parse_cmds'
   drivers/gpu/drm/i915/intel_lrc.c:316: warning: No description found for parameter 'engine'
   drivers/gpu/drm/i915/intel_lrc.c:316: warning: Excess function parameter 'ring' description in 'intel_lr_context_descriptor_update'
   drivers/gpu/drm/i915/intel_lrc.c:353: warning: No description found for parameter 'engine'
   drivers/gpu/drm/i915/intel_lrc.c:353: warning: Excess function parameter 'ring' description in 'intel_execlists_ctx_id'
   drivers/gpu/drm/i915/intel_lrc.c:544: warning: No description found for parameter 'data'
   drivers/gpu/drm/i915/intel_lrc.c:544: warning: Excess function parameter 'engine' description in 'intel_lrc_irq_handler'
   drivers/gpu/drm/i915/intel_lrc.c:938: warning: No description found for parameter 'params'
   drivers/gpu/drm/i915/intel_lrc.c:938: warning: Excess function parameter 'dev' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_lrc.c:938: warning: Excess function parameter 'file' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_lrc.c:938: warning: Excess function parameter 'ring' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_lrc.c:938: warning: Excess function parameter 'ctx' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_lrc.c:938: warning: Excess function parameter 'batch_obj' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_lrc.c:938: warning: Excess function parameter 'exec_start' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_lrc.c:938: warning: Excess function parameter 'dispatch_flags' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_lrc.c:1323: warning: No description found for parameter 'engine'
   drivers/gpu/drm/i915/intel_lrc.c:1323: warning: Excess function parameter 'ring' description in 'gen8_init_indirectctx_bb'
   drivers/gpu/drm/i915/intel_lrc.c:1386: warning: No description found for parameter 'engine'
   drivers/gpu/drm/i915/intel_lrc.c:1386: warning: Excess function parameter 'ring' description in 'gen8_init_perctx_bb'
   drivers/gpu/drm/i915/intel_lrc.c:2029: warning: No description found for parameter 'engine'
   drivers/gpu/drm/i915/intel_lrc.c:2029: warning: Excess function parameter 'ring' description in 'intel_logical_ring_cleanup'
   drivers/gpu/drm/i915/intel_lrc.c:2614: warning: No description found for parameter 'engine'
   drivers/gpu/drm/i915/intel_lrc.c:2614: warning: Excess function parameter 'ring' description in 'intel_lr_context_size'
   drivers/gpu/drm/i915/intel_lrc.c:2653: warning: No description found for parameter 'engine'
   drivers/gpu/drm/i915/intel_lrc.c:2653: warning: Excess function parameter 'ring' description in 'intel_lr_context_deferred_alloc'
   drivers/gpu/drm/i915/intel_lrc.c:316: warning: No description found for parameter 'engine'
   drivers/gpu/drm/i915/intel_lrc.c:316: warning: Excess function parameter 'ring' description in 'intel_lr_context_descriptor_update'
   drivers/gpu/drm/i915/intel_lrc.c:353: warning: No description found for parameter 'engine'
   drivers/gpu/drm/i915/intel_lrc.c:353: warning: Excess function parameter 'ring' description in 'intel_execlists_ctx_id'
   drivers/gpu/drm/i915/intel_lrc.c:544: warning: No description found for parameter 'data'
   drivers/gpu/drm/i915/intel_lrc.c:544: warning: Excess function parameter 'engine' description in 'intel_lrc_irq_handler'
   drivers/gpu/drm/i915/intel_lrc.c:938: warning: No description found for parameter 'params'
   drivers/gpu/drm/i915/intel_lrc.c:938: warning: Excess function parameter 'dev' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_lrc.c:938: warning: Excess function parameter 'file' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_lrc.c:938: warning: Excess function parameter 'ring' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_lrc.c:938: warning: Excess function parameter 'ctx' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_lrc.c:938: warning: Excess function parameter 'batch_obj' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_lrc.c:938: warning: Excess function parameter 'exec_start' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_lrc.c:938: warning: Excess function parameter 'dispatch_flags' description in 'intel_execlists_submission'
   drivers/gpu/drm/i915/intel_lrc.c:1323: warning: No description found for parameter 'engine'
   drivers/gpu/drm/i915/intel_lrc.c:1323: warning: Excess function parameter 'ring' description in 'gen8_init_indirectctx_bb'
   drivers/gpu/drm/i915/intel_lrc.c:1386: warning: No description found for parameter 'engine'
   drivers/gpu/drm/i915/intel_lrc.c:1386: warning: Excess function parameter 'ring' description in 'gen8_init_perctx_bb'
   drivers/gpu/drm/i915/intel_lrc.c:2029: warning: No description found for parameter 'engine'

vim +/i915 +780 drivers/gpu/drm/i915/i915_gem.c

4f0c7cfb Ben Widawsky       2012-04-16  764  	vaddr = (void __force*)vaddr_atomic + page_offset;
4f0c7cfb Ben Widawsky       2012-04-16  765  	unwritten = __copy_from_user_inatomic_nocache(vaddr,
0839ccb8 Keith Packard      2008-10-30  766  						      user_data, length);
3e4d3af5 Peter Zijlstra     2010-10-26  767  	io_mapping_unmap_atomic(vaddr_atomic);
fbd5a26d Chris Wilson       2010-10-14  768  	return unwritten;
0839ccb8 Keith Packard      2008-10-30  769  }
0839ccb8 Keith Packard      2008-10-30  770  
3de09aa3 Eric Anholt        2009-03-09  771  /**
3de09aa3 Eric Anholt        2009-03-09  772   * This is the fast pwrite path, where we copy the data directly from the
3de09aa3 Eric Anholt        2009-03-09  773   * user into the GTT, uncached.
3de09aa3 Eric Anholt        2009-03-09  774   */
673a394b Eric Anholt        2008-07-30  775  static int
81e361f6 Ankitprasad Sharma 2016-04-20  776  i915_gem_gtt_pwrite_fast(struct drm_i915_private *i915,
05394f39 Chris Wilson       2010-11-08  777  			 struct drm_i915_gem_object *obj,
673a394b Eric Anholt        2008-07-30  778  			 struct drm_i915_gem_pwrite *args,
05394f39 Chris Wilson       2010-11-08  779  			 struct drm_file *file)
673a394b Eric Anholt        2008-07-30 @780  {
81e361f6 Ankitprasad Sharma 2016-04-20  781  	struct i915_ggtt *ggtt = &i915->ggtt;
81e361f6 Ankitprasad Sharma 2016-04-20  782  	struct drm_mm_node node;
81e361f6 Ankitprasad Sharma 2016-04-20  783  	uint64_t remain, offset;
673a394b Eric Anholt        2008-07-30  784  	char __user *user_data;
81e361f6 Ankitprasad Sharma 2016-04-20  785  	int ret;
935aaa69 Daniel Vetter      2012-03-25  786  
1ec9e26d Daniel Vetter      2014-02-14  787  	ret = i915_gem_obj_ggtt_pin(obj, 0, PIN_MAPPABLE | PIN_NONBLOCK);
81e361f6 Ankitprasad Sharma 2016-04-20  788  	if (ret) {

:::::: The code at line 780 was first introduced by commit
:::::: 673a394b1e3b69be886ff24abfd6df97c52e8d08 drm: Add GEM ("graphics execution manager") to i915 driver.

:::::: TO: Eric Anholt <eric at anholt.net>
:::::: CC: Dave Airlie <airlied at linux.ie>

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