[Intel-gfx] [PATCH 5/5] drm/i915: Use remap_io_mapping() to prefault all PTE in a single pass

[shuang.he at intel.com]

Tested-By: Intel Graphics QA PRTS (Patch Regression Test System Contact: shuang.he at intel.com)
Task id: 6142
-------------------------------------Summary-------------------------------------
Platform          Delta          drm-intel-nightly          Series Applied
PNV                 -3              272/272              269/272
ILK                 -1              302/302              301/302
SNB                                  303/303              303/303
IVB                                  338/338              338/338
BYT                 -1              287/287              286/287
HSW                                  361/361              361/361
BDW                                  308/308              308/308
-------------------------------------Detailed-------------------------------------
Platform  Test                                drm-intel-nightly          Series Applied
 PNV  igt at gem_tiled_pread_pwrite      FAIL(3)PASS(13)      FAIL(1)PASS(1)
 PNV  igt at gem_userptr_blits@coherency-sync      CRASH(6)PASS(9)      CRASH(2)
 PNV  igt at gen3_render_tiledx_blits      FAIL(8)PASS(6)      FAIL(2)
*ILK  igt at kms_flip@flip-vs-rmfb-interruptible      PASS(3)      DMESG_WARN(1)PASS(1)
(dmesg patch applied)drm:intel_pch_fifo_underrun_irq_handler[i915]]*ERROR*PCH_transcoder_A_FIFO_underrun at PCH transcoder A FIFO underrun
*BYT  igt at gem_exec_bad_domains@conflicting-write-domain      PASS(22)      FAIL(1)PASS(1)
Note: You need to pay more attention to line start with '*'