[   46.164534] ======================================================
[   46.164538] WARNING: possible circular locking dependency detected
[   46.164542] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[   46.164544] ------------------------------------------------------
[   46.164547] debugfs_test/1560 is trying to acquire lock:
[   46.164550]  (&dev->struct_mutex){+.+.}, at: [<00000000bf070ef3>] i915_mute...
[   46.164632] 
               but task is already holding lock:
[   46.164635]  (&mm->mmap_sem){++++}, at: [<000000005986f16e>] __do_page_faul...
[   46.164646] 
               which lock already depends on the new lock.

[   46.164650] 
               the existing dependency chain (in reverse order) is:
[   46.164654] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   22.156624] ======================================================
[   22.156629] WARNING: possible circular locking dependency detected
[   22.156634] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   22.156638] ------------------------------------------------------
[   22.156642] debugfs_test/1398 is trying to acquire lock:
[   22.156646]  (&dev->struct_mutex){+.+.}, at: [<00000000a0b53330>] i915_mute...
[   22.156696] 
               but task is already holding lock:
[   22.156701]  (&mm->mmap_sem){++++}, at: [<000000000cb4a53b>] __do_page_faul...
[   22.156711] 
               which lock already depends on the new lock.

[   22.156716] 
               the existing dependency chain (in reverse order) is:
[   22.156721] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   48.544843] ======================================================
[   48.544844] WARNING: possible circular locking dependency detected
[   48.544847] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[   48.544848] ------------------------------------------------------
[   48.544850] debugfs_test/1426 is trying to acquire lock:
[   48.544852]  (&dev->struct_mutex){+.+.}, at: [<0000000048981bc5>] i915_mute...
[   48.544906] 
               but task is already holding lock:
[   48.544908]  (&mm->mmap_sem){++++}, at: [<000000003e5b7b13>] __do_page_faul...
[   48.544915] 
               which lock already depends on the new lock.

[   48.544917] 
               the existing dependency chain (in reverse order) is:
[   48.544918] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   47.244215] ======================================================
[   47.244217] WARNING: possible circular locking dependency detected
[   47.244219] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   47.244220] ------------------------------------------------------
[   47.244222] debugfs_test/1484 is trying to acquire lock:
[   47.244224]  (&dev->struct_mutex){+.+.}, at: [<00000000ce0053c3>] i915_mute...
[   47.244280] 
               but task is already holding lock:
[   47.244281]  (&mm->mmap_sem){++++}, at: [<000000003b2344da>] __do_page_faul...
[   47.244288] 
               which lock already depends on the new lock.

[   47.244290] 
               the existing dependency chain (in reverse order) is:
[   47.244291] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   51.447458] ======================================================
[   51.447459] WARNING: possible circular locking dependency detected
[   51.447462] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[   51.447463] ------------------------------------------------------
[   51.447465] debugfs_test/1446 is trying to acquire lock:
[   51.447467]  (&dev->struct_mutex){+.+.}, at: [<000000007f7b5a09>] i915_mute...
[   51.447523] 
               but task is already holding lock:
[   51.447524]  (&mm->mmap_sem){++++}, at: [<00000000d79f7727>] __do_page_faul...
[   51.447531] 
               which lock already depends on the new lock.

[   51.447533] 
               the existing dependency chain (in reverse order) is:
[   51.447534] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   33.139401] ======================================================
[   33.139402] WARNING: possible circular locking dependency detected
[   33.139405] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   33.139406] ------------------------------------------------------
[   33.139407] debugfs_test/1373 is trying to acquire lock:
[   33.139409]  (&dev->struct_mutex){+.+.}, at: [<00000000c5d1890a>] i915_mute...
[   33.139465] 
               but task is already holding lock:
[   33.139467]  (&mm->mmap_sem){++++}, at: [<00000000a0a273eb>] __do_page_faul...
[   33.139474] 
               which lock already depends on the new lock.

[   33.139476] 
               the existing dependency chain (in reverse order) is:
[   33.139477] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   36.687254] ======================================================
[   36.687255] WARNING: possible circular locking dependency detected
[   36.687256] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[   36.687257] ------------------------------------------------------
[   36.687258] debugfs_test/1327 is trying to acquire lock:
[   36.687258]  (&dev->struct_mutex){+.+.}, at: [<0000000054b42b6d>] i915_mute...
[   36.687283] 
               but task is already holding lock:
[   36.687284]  (&mm->mmap_sem){++++}, at: [<000000006724f3ce>] __do_page_faul...
[   36.687287] 
               which lock already depends on the new lock.

[   36.687288] 
               the existing dependency chain (in reverse order) is:
[   36.687288] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   20.546264] ======================================================
[   20.546264] WARNING: possible circular locking dependency detected
[   20.546266] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   20.546266] ------------------------------------------------------
[   20.546267] debugfs_test/1336 is trying to acquire lock:
[   20.546268]  (&dev->struct_mutex){+.+.}, at: [<00000000f23bb586>] i915_mute...
[   20.546292] 
               but task is already holding lock:
[   20.546293]  (&mm->mmap_sem){++++}, at: [<00000000de64cdc0>] __do_page_faul...
[   20.546296] 
               which lock already depends on the new lock.

[   20.546297] 
               the existing dependency chain (in reverse order) is:
[   20.546298] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   47.772154] ======================================================
[   47.772155] WARNING: possible circular locking dependency detected
[   47.772157] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[   47.772157] ------------------------------------------------------
[   47.772158] debugfs_test/1356 is trying to acquire lock:
[   47.772159]  (&dev->struct_mutex){+.+.}, at: [<00000000c92e1ed4>] i915_mute...
[   47.772188] 
               but task is already holding lock:
[   47.772188]  (&mm->mmap_sem){++++}, at: [<00000000666f6d0e>] __do_page_faul...
[   47.772192] 
               which lock already depends on the new lock.

[   47.772193] 
               the existing dependency chain (in reverse order) is:
[   47.772194] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   16.906709] ======================================================
[   16.906710] WARNING: possible circular locking dependency detected
[   16.906711] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   16.906712] ------------------------------------------------------
[   16.906713] debugfs_test/1316 is trying to acquire lock:
[   16.906714]  (&dev->struct_mutex){+.+.}, at: [<000000001cae4f92>] i915_mute...
[   16.906741] 
               but task is already holding lock:
[   16.906742]  (&mm->mmap_sem){++++}, at: [<0000000047d0cc84>] __do_page_faul...
[   16.906745] 
               which lock already depends on the new lock.

[   16.906746] 
               the existing dependency chain (in reverse order) is:
[   16.906747] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   32.189373] ======================================================
[   32.189376] WARNING: possible circular locking dependency detected
[   32.189380] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[   32.189382] ------------------------------------------------------
[   32.189385] debugfs_test/1216 is trying to acquire lock:
[   32.189387]  (&dev->struct_mutex){+.+.}, at: [<00000000d491e41c>] i915_mute...
[   32.189457] 
               but task is already holding lock:
[   32.189459]  (&mm->mmap_sem){++++}, at: [<00000000e340c6f2>] __do_page_faul...
[   32.189469] 
               which lock already depends on the new lock.

[   32.189473] 
               the existing dependency chain (in reverse order) is:
[   32.189476] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   27.415801] ======================================================
[   27.415804] WARNING: possible circular locking dependency detected
[   27.415809] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   27.415812] ------------------------------------------------------
[   27.415815] debugfs_test/1169 is trying to acquire lock:
[   27.415818]  (&dev->struct_mutex){+.+.}, at: [<00000000bce50b26>] i915_mute...
[   27.415906] 
               but task is already holding lock:
[   27.415909]  (&mm->mmap_sem){++++}, at: [<00000000c3779238>] __do_page_faul...
[   27.415922] 
               which lock already depends on the new lock.

[   27.415926] 
               the existing dependency chain (in reverse order) is:
[   27.415930] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   45.028975] ======================================================
[   45.028977] WARNING: possible circular locking dependency detected
[   45.028978] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[   45.028979] ------------------------------------------------------
[   45.028980] debugfs_test/1441 is trying to acquire lock:
[   45.028981]  (&dev->struct_mutex){+.+.}, at: [<0000000010a2f343>] i915_mute...
[   45.029013] 
               but task is already holding lock:
[   45.029014]  (&mm->mmap_sem){++++}, at: [<00000000a4e99d95>] __do_page_faul...
[   45.029018] 
               which lock already depends on the new lock.

[   45.029020] 
               the existing dependency chain (in reverse order) is:
[   45.029021] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   36.605578] ======================================================
[   36.605579] WARNING: possible circular locking dependency detected
[   36.605581] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   36.605582] ------------------------------------------------------
[   36.605583] debugfs_test/1531 is trying to acquire lock:
[   36.605584]  (&dev->struct_mutex){+.+.}, at: [<000000005f4bb63a>] i915_mute...
[   36.605622] 
               but task is already holding lock:
[   36.605623]  (&mm->mmap_sem){++++}, at: [<0000000009f078a3>] __do_page_faul...
[   36.605628] 
               which lock already depends on the new lock.

[   36.605629] 
               the existing dependency chain (in reverse order) is:
[   36.605631] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   52.749148] ======================================================
[   52.749149] WARNING: possible circular locking dependency detected
[   52.749152] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[   52.749154] ------------------------------------------------------
[   52.749156] debugfs_test/1375 is trying to acquire lock:
[   52.749158]  (&dev->struct_mutex){+.+.}, at: [<000000003f8c46b9>] i915_mute...
[   52.749214] 
               but task is already holding lock:
[   52.749216]  (&mm->mmap_sem){++++}, at: [<000000001d9b5202>] __do_page_faul...
[   52.749223] 
               which lock already depends on the new lock.

[   52.749225] 
               the existing dependency chain (in reverse order) is:
[   52.749227] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   39.192828] ======================================================
[   39.192829] WARNING: possible circular locking dependency detected
[   39.192833] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   39.192834] ------------------------------------------------------
[   39.192836] debugfs_test/1353 is trying to acquire lock:
[   39.192838]  (&dev->struct_mutex){+.+.}, at: [<0000000090a21c9b>] i915_mute...
[   39.192895] 
               but task is already holding lock:
[   39.192897]  (&mm->mmap_sem){++++}, at: [<0000000041bfceff>] __do_page_faul...
[   39.192904] 
               which lock already depends on the new lock.

[   39.192906] 
               the existing dependency chain (in reverse order) is:
[   39.192907] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   52.172098] ======================================================
[   52.172099] WARNING: possible circular locking dependency detected
[   52.172103] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[   52.172104] ------------------------------------------------------
[   52.172106] debugfs_test/1495 is trying to acquire lock:
[   52.172108]  (&dev->struct_mutex){+.+.}, at: [<00000000725dd098>] i915_mute...
[   52.172164] 
               but task is already holding lock:
[   52.172166]  (&mm->mmap_sem){++++}, at: [<000000001d1c1a85>] __do_page_faul...
[   52.172172] 
               which lock already depends on the new lock.

[   52.172174] 
               the existing dependency chain (in reverse order) is:
[   52.172176] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   33.612640] ======================================================
[   33.612642] WARNING: possible circular locking dependency detected
[   33.612645] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   33.612647] ------------------------------------------------------
[   33.612649] debugfs_test/1398 is trying to acquire lock:
[   33.612651]  (&dev->struct_mutex){+.+.}, at: [<00000000f690cbdf>] i915_mute...
[   33.612719] 
               but task is already holding lock:
[   33.612721]  (&mm->mmap_sem){++++}, at: [<00000000189ead03>] __do_page_faul...
[   33.612728] 
               which lock already depends on the new lock.

[   33.612730] 
               the existing dependency chain (in reverse order) is:
[   33.612732] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   35.892347] ======================================================
[   35.892348] WARNING: possible circular locking dependency detected
[   35.892350] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[   35.892351] ------------------------------------------------------
[   35.892352] debugfs_test/1376 is trying to acquire lock:
[   35.892352]  (&dev->struct_mutex){+.+.}, at: [<00000000943dae01>] i915_mute...
[   35.892382] 
               but task is already holding lock:
[   35.892383]  (&mm->mmap_sem){++++}, at: [<000000000b1c133b>] __do_page_faul...
[   35.892386] 
               which lock already depends on the new lock.

[   35.892388] 
               the existing dependency chain (in reverse order) is:
[   35.892389] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   21.896872] ======================================================
[   21.896874] WARNING: possible circular locking dependency detected
[   21.896876] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   21.896877] ------------------------------------------------------
[   21.896879] debugfs_test/1353 is trying to acquire lock:
[   21.896881]  (&dev->struct_mutex){+.+.}, at: [<00000000498c682f>] i915_mute...
[   21.896921] 
               but task is already holding lock:
[   21.896922]  (&mm->mmap_sem){++++}, at: [<00000000f48241d4>] __do_page_faul...
[   21.896928] 
               which lock already depends on the new lock.

[   21.896930] 
               the existing dependency chain (in reverse order) is:
[   21.896933] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   48.824843] ======================================================
[   48.824844] WARNING: possible circular locking dependency detected
[   48.824846] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[   48.824847] ------------------------------------------------------
[   48.824848] debugfs_test/1452 is trying to acquire lock:
[   48.824849]  (&dev->struct_mutex){+.+.}, at: [<00000000a4ddfecf>] i915_mute...
[   48.824880] 
               but task is already holding lock:
[   48.824881]  (&mm->mmap_sem){++++}, at: [<0000000062f21dea>] __do_page_faul...
[   48.824885] 
               which lock already depends on the new lock.

[   48.824886] 
               the existing dependency chain (in reverse order) is:
[   48.824887] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   15.901581] ======================================================
[   15.901582] WARNING: possible circular locking dependency detected
[   15.901584] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   15.901584] ------------------------------------------------------
[   15.901586] debugfs_test/1282 is trying to acquire lock:
[   15.901587]  (&dev->struct_mutex){+.+.}, at: [<00000000031cb63d>] i915_mute...
[   15.901619] 
               but task is already holding lock:
[   15.901620]  (&mm->mmap_sem){++++}, at: [<00000000e7afaa28>] __do_page_faul...
[   15.901624] 
               which lock already depends on the new lock.

[   15.901625] 
               the existing dependency chain (in reverse order) is:
[   15.901627] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   31.550525] ======================================================
[   31.550526] WARNING: possible circular locking dependency detected
[   31.550527] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[   31.550528] ------------------------------------------------------
[   31.550529] debugfs_test/1488 is trying to acquire lock:
[   31.550530]  (&dev->struct_mutex){+.+.}, at: [<0000000013f5a951>] i915_mute...
[   31.550561] 
               but task is already holding lock:
[   31.550562]  (&mm->mmap_sem){++++}, at: [<00000000bd882eea>] __do_page_faul...
[   31.550566] 
               which lock already depends on the new lock.

[   31.550567] 
               the existing dependency chain (in reverse order) is:
[   31.550568] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   27.351927] ======================================================
[   27.351928] WARNING: possible circular locking dependency detected
[   27.351930] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   27.351931] ------------------------------------------------------
[   27.351933] debugfs_test/1401 is trying to acquire lock:
[   27.351934]  (&dev->struct_mutex){+.+.}, at: [<000000001e98e15c>] i915_mute...
[   27.351968] 
               but task is already holding lock:
[   27.351969]  (&mm->mmap_sem){++++}, at: [<00000000badbf7fa>] __do_page_faul...
[   27.351974] 
               which lock already depends on the new lock.

[   27.351975] 
               the existing dependency chain (in reverse order) is:
[   27.351977] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   33.845772] i915 0000:00:02.0: DP-2: EDID is invalid:
[   33.845776] 	[00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   33.845777] 	[00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   33.845778] 	[00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   33.845780] 	[00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   33.845781] 	[00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   33.845782] 	[00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   33.845783] 	[00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   33.845784] 	[00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

[   33.854183] ======================================================
[   33.854184] WARNING: possible circular locking dependency detected
[   33.854185] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[   33.854185] ------------------------------------------------------
[   33.854186] debugfs_test/1495 is trying to acquire lock:
[   33.854187]  (&dev->struct_mutex){+.+.}, at: [<00000000ef5870f6>] i915_mute...
[   33.854210] 
...

[   19.875624] i915 0000:00:02.0: DP-2: EDID is invalid:
[   19.875636] 	[00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   19.875643] 	[00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   19.875649] 	[00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   19.875655] 	[00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   19.875661] 	[00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   19.875667] 	[00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   19.875672] 	[00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   19.875678] 	[00] ZERO 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

[   19.896301] ======================================================
[   19.896304] WARNING: possible circular locking dependency detected
[   19.896307] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   19.896309] ------------------------------------------------------
[   19.896311] debugfs_test/1353 is trying to acquire lock:
[   19.896314]  (&dev->struct_mutex){+.+.}, at: [<000000005714355f>] i915_mute...
[   19.896381] 
...

[   35.059338] ======================================================
[   35.059340] WARNING: possible circular locking dependency detected
[   35.059345] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[   35.059347] ------------------------------------------------------
[   35.059350] debugfs_test/1415 is trying to acquire lock:
[   35.059352]  (&dev->struct_mutex){+.+.}, at: [<00000000d08d71af>] i915_mute...
[   35.059408] 
               but task is already holding lock:
[   35.059410]  (&mm->mmap_sem){++++}, at: [<00000000604409ec>] __do_page_faul...
[   35.059418] 
               which lock already depends on the new lock.

[   35.059421] 
               the existing dependency chain (in reverse order) is:
[   35.059424] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   19.107379] ======================================================
[   19.107381] WARNING: possible circular locking dependency detected
[   19.107383] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   19.107384] ------------------------------------------------------
[   19.107385] debugfs_test/1383 is trying to acquire lock:
[   19.107386]  (&dev->struct_mutex){+.+.}, at: [<00000000af4e588d>] i915_mute...
[   19.107424] 
               but task is already holding lock:
[   19.107426]  (&mm->mmap_sem){++++}, at: [<00000000dd5b7905>] __do_page_faul...
[   19.107431] 
               which lock already depends on the new lock.

[   19.107432] 
               the existing dependency chain (in reverse order) is:
[   19.107434] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   44.764678] ======================================================
[   44.764680] WARNING: possible circular locking dependency detected
[   44.764682] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[   44.764684] ------------------------------------------------------
[   44.764686] debugfs_test/1292 is trying to acquire lock:
[   44.764687]  (&dev->struct_mutex){+.+.}, at: [<00000000f289291c>] i915_mute...
[   44.764734] 
               but task is already holding lock:
[   44.764736]  (&mm->mmap_sem){++++}, at: [<000000008a5d0e16>] __do_page_faul...
[   44.764742] 
               which lock already depends on the new lock.

[   44.764744] 
               the existing dependency chain (in reverse order) is:
[   44.764746] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   25.817326] ======================================================
[   25.817328] WARNING: possible circular locking dependency detected
[   25.817332] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   25.817334] ------------------------------------------------------
[   25.817337] debugfs_test/1279 is trying to acquire lock:
[   25.817339]  (&dev->struct_mutex){+.+.}, at: [<0000000057f2969b>] i915_mute...
[   25.817401] 
               but task is already holding lock:
[   25.817404]  (&mm->mmap_sem){++++}, at: [<00000000155fbcc8>] __do_page_faul...
[   25.817413] 
               which lock already depends on the new lock.

[   25.817416] 
               the existing dependency chain (in reverse order) is:
[   25.817419] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   87.206855] ======================================================
[   87.206857] WARNING: possible circular locking dependency detected
[   87.206861] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[   87.206864] ------------------------------------------------------
[   87.206867] debugfs_test/1335 is trying to acquire lock:
[   87.206870]  (&dev->struct_mutex){+.+.}, at: [<00000000735bc62f>] i915_mute...
[   87.206965] 
               but task is already holding lock:
[   87.206968]  (&mm->mmap_sem){++++}, at: [<00000000e877d1d7>] __do_page_faul...
[   87.206981] 
               which lock already depends on the new lock.

[   87.206984] 
               the existing dependency chain (in reverse order) is:
[   87.206987] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   61.816674] ======================================================
[   61.816676] WARNING: possible circular locking dependency detected
[   61.816681] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   61.816683] ------------------------------------------------------
[   61.816685] debugfs_test/1379 is trying to acquire lock:
[   61.816688]  (&dev->struct_mutex){+.+.}, at: [<00000000bee4d77b>] i915_mute...
[   61.816775] 
               but task is already holding lock:
[   61.816777]  (&mm->mmap_sem){++++}, at: [<0000000010a335c7>] __do_page_faul...
[   61.816788] 
               which lock already depends on the new lock.

[   61.816792] 
               the existing dependency chain (in reverse order) is:
[   61.816795] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   30.069734] ======================================================
[   30.069735] WARNING: possible circular locking dependency detected
[   30.069736] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[   30.069737] ------------------------------------------------------
[   30.069738] debugfs_test/1357 is trying to acquire lock:
[   30.069739]  (&dev->struct_mutex){+.+.}, at: [<00000000a19e578b>] i915_mute...
[   30.069770] 
               but task is already holding lock:
[   30.069770]  (&mm->mmap_sem){++++}, at: [<00000000d357f281>] __do_page_faul...
[   30.069774] 
               which lock already depends on the new lock.

[   30.069776] 
               the existing dependency chain (in reverse order) is:
[   30.069777] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   21.777420] ======================================================
[   21.777421] WARNING: possible circular locking dependency detected
[   21.777422] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   21.777423] ------------------------------------------------------
[   21.777424] debugfs_test/1344 is trying to acquire lock:
[   21.777425]  (&dev->struct_mutex){+.+.}, at: [<000000002ffd5ccb>] i915_mute...
[   21.777456] 
               but task is already holding lock:
[   21.777457]  (&mm->mmap_sem){++++}, at: [<000000000b0bc147>] __do_page_faul...
[   21.777461] 
               which lock already depends on the new lock.

[   21.777462] 
               the existing dependency chain (in reverse order) is:
[   21.777463] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   45.797099] ======================================================
[   45.797101] WARNING: possible circular locking dependency detected
[   45.797102] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[   45.797103] ------------------------------------------------------
[   45.797104] debugfs_test/1290 is trying to acquire lock:
[   45.797105]  (&dev->struct_mutex){+.+.}, at: [<00000000ee4b5339>] i915_mute...
[   45.797139] 
               but task is already holding lock:
[   45.797140]  (&mm->mmap_sem){++++}, at: [<000000000f3ad446>] __do_page_faul...
[   45.797144] 
               which lock already depends on the new lock.

[   45.797146] 
               the existing dependency chain (in reverse order) is:
[   45.797147] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   34.248792] ======================================================
[   34.248793] WARNING: possible circular locking dependency detected
[   34.248795] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   34.248796] ------------------------------------------------------
[   34.248797] debugfs_test/1276 is trying to acquire lock:
[   34.248798]  (&dev->struct_mutex){+.+.}, at: [<000000002ac33c27>] i915_mute...
[   34.248833] 
               but task is already holding lock:
[   34.248834]  (&mm->mmap_sem){++++}, at: [<00000000d6efabaa>] __do_page_faul...
[   34.248839] 
               which lock already depends on the new lock.

[   34.248841] 
               the existing dependency chain (in reverse order) is:
[   34.248842] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   27.739947] ======================================================
[   27.739947] WARNING: possible circular locking dependency detected
[   27.739949] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[   27.739949] ------------------------------------------------------
[   27.739950] debugfs_test/1426 is trying to acquire lock:
[   27.739951]  (&dev->struct_mutex){+.+.}, at: [<00000000aa789bdd>] i915_mute...
[   27.739984] 
               but task is already holding lock:
[   27.739985]  (&mm->mmap_sem){++++}, at: [<000000008e328d59>] __do_page_faul...
[   27.739988] 
               which lock already depends on the new lock.

[   27.739989] 
               the existing dependency chain (in reverse order) is:
[   27.739990] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   22.105077] ======================================================
[   22.105078] WARNING: possible circular locking dependency detected
[   22.105079] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   22.105080] ------------------------------------------------------
[   22.105080] debugfs_test/1428 is trying to acquire lock:
[   22.105081]  (&dev->struct_mutex){+.+.}, at: [<0000000039fd5509>] i915_mute...
[   22.105111] 
               but task is already holding lock:
[   22.105112]  (&mm->mmap_sem){++++}, at: [<000000009e135307>] __do_page_faul...
[   22.105115] 
               which lock already depends on the new lock.

[   22.105115] 
               the existing dependency chain (in reverse order) is:
[   22.105116] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   26.112223] ======================================================
[   26.112224] WARNING: possible circular locking dependency detected
[   26.112225] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[   26.112226] ------------------------------------------------------
[   26.112227] debugfs_test/1431 is trying to acquire lock:
[   26.112228]  (&dev->struct_mutex){+.+.}, at: [<000000002fc0a62e>] i915_mute...
[   26.112258] 
               but task is already holding lock:
[   26.112259]  (&mm->mmap_sem){++++}, at: [<00000000080211cb>] __do_page_faul...
[   26.112262] 
               which lock already depends on the new lock.

[   26.112263] 
               the existing dependency chain (in reverse order) is:
[   26.112264] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   26.622645] ======================================================
[   26.622646] WARNING: possible circular locking dependency detected
[   26.622647] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   26.622648] ------------------------------------------------------
[   26.622649] debugfs_test/1429 is trying to acquire lock:
[   26.622650]  (&dev->struct_mutex){+.+.}, at: [<0000000030722697>] i915_mute...
[   26.622675] 
               but task is already holding lock:
[   26.622676]  (&mm->mmap_sem){++++}, at: [<000000008141b382>] __do_page_faul...
[   26.622679] 
               which lock already depends on the new lock.

[   26.622680] 
               the existing dependency chain (in reverse order) is:
[   26.622681] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   74.399639] ======================================================
[   74.399642] WARNING: possible circular locking dependency detected
[   74.399646] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[   74.399648] ------------------------------------------------------
[   74.399651] debugfs_test/1387 is trying to acquire lock:
[   74.399654]  (&dev->struct_mutex){+.+.}, at: [<00000000877e4aac>] i915_mute...
[   74.399749] 
               but task is already holding lock:
[   74.399751]  (&mm->mmap_sem){++++}, at: [<0000000073444908>] __do_page_faul...
[   74.399764] 
               which lock already depends on the new lock.

[   74.399767] 
               the existing dependency chain (in reverse order) is:
[   74.399770] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   43.454720] ======================================================
[   43.454723] WARNING: possible circular locking dependency detected
[   43.454727] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   43.454729] ------------------------------------------------------
[   43.454732] debugfs_test/1375 is trying to acquire lock:
[   43.454735]  (&dev->struct_mutex){+.+.}, at: [<00000000de511a5d>] i915_mute...
[   43.454824] 
               but task is already holding lock:
[   43.454827]  (&mm->mmap_sem){++++}, at: [<000000004dfacc05>] __do_page_faul...
[   43.454837] 
               which lock already depends on the new lock.

[   43.454841] 
               the existing dependency chain (in reverse order) is:
[   43.454843] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   74.820643] ======================================================
[   74.820646] WARNING: possible circular locking dependency detected
[   74.820650] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[   74.820652] ------------------------------------------------------
[   74.820655] debugfs_test/1268 is trying to acquire lock:
[   74.820658]  (&dev->struct_mutex){+.+.}, at: [<000000001963abe6>] i915_mute...
[   74.820754] 
               but task is already holding lock:
[   74.820757]  (&mm->mmap_sem){++++}, at: [<00000000b8a61303>] __do_page_faul...
[   74.820767] 
               which lock already depends on the new lock.

[   74.820771] 
               the existing dependency chain (in reverse order) is:
[   74.820775] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   51.974231] ======================================================
[   51.974235] WARNING: possible circular locking dependency detected
[   51.974239] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   51.974241] ------------------------------------------------------
[   51.974245] debugfs_test/1303 is trying to acquire lock:
[   51.974248]  (&dev->struct_mutex){+.+.}, at: [<00000000f07b0792>] i915_mute...
[   51.974345] 
               but task is already holding lock:
[   51.974348]  (&mm->mmap_sem){++++}, at: [<000000008b2295fd>] __do_page_faul...
[   51.974360] 
               which lock already depends on the new lock.

[   51.974364] 
               the existing dependency chain (in reverse order) is:
[   51.974368] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   33.293714] ======================================================
[   33.293714] WARNING: possible circular locking dependency detected
[   33.293716] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[   33.293716] ------------------------------------------------------
[   33.293717] debugfs_test/1471 is trying to acquire lock:
[   33.293718]  (&dev->struct_mutex){+.+.}, at: [<00000000bd83af06>] i915_mute...
[   33.293759] 
               but task is already holding lock:
[   33.293760]  (&mm->mmap_sem){++++}, at: [<00000000d43156d9>] __do_page_faul...
[   33.293763] 
               which lock already depends on the new lock.

[   33.293765] 
               the existing dependency chain (in reverse order) is:
[   33.293766] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   23.373532] ======================================================
[   23.373533] WARNING: possible circular locking dependency detected
[   23.373534] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   23.373535] ------------------------------------------------------
[   23.373536] debugfs_test/1457 is trying to acquire lock:
[   23.373536]  (&dev->struct_mutex){+.+.}, at: [<00000000a2f21446>] i915_mute...
[   23.373580] 
               but task is already holding lock:
[   23.373581]  (&mm->mmap_sem){++++}, at: [<00000000ae13be3e>] __do_page_faul...
[   23.373584] 
               which lock already depends on the new lock.

[   23.373585] 
               the existing dependency chain (in reverse order) is:
[   23.373586] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   28.646561] ======================================================
[   28.646562] WARNING: possible circular locking dependency detected
[   28.646563] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[   28.646563] ------------------------------------------------------
[   28.646564] debugfs_test/1422 is trying to acquire lock:
[   28.646565]  (&dev->struct_mutex){+.+.}, at: [<00000000904f983e>] i915_mute...
[   28.646586] 
               but task is already holding lock:
[   28.646587]  (&mm->mmap_sem){++++}, at: [<0000000021d2a396>] __do_page_faul...
[   28.646590] 
               which lock already depends on the new lock.

[   28.646591] 
               the existing dependency chain (in reverse order) is:
[   28.646592] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   24.611294] ======================================================
[   24.611294] WARNING: possible circular locking dependency detected
[   24.611296] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   24.611296] ------------------------------------------------------
[   24.611297] debugfs_test/1405 is trying to acquire lock:
[   24.611298]  (&dev->struct_mutex){+.+.}, at: [<000000002f5a7ffb>] i915_mute...
[   24.611318] 
               but task is already holding lock:
[   24.611319]  (&mm->mmap_sem){++++}, at: [<00000000fe9b784a>] __do_page_faul...
[   24.611322] 
               which lock already depends on the new lock.

[   24.611323] 
               the existing dependency chain (in reverse order) is:
[   24.611324] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   49.365283] ======================================================
[   49.365284] WARNING: possible circular locking dependency detected
[   49.365285] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[   49.365286] ------------------------------------------------------
[   49.365287] debugfs_test/1502 is trying to acquire lock:
[   49.365288]  (&dev->struct_mutex){+.+.}, at: [<00000000b8be0fbc>] i915_mute...
[   49.365324] 
               but task is already holding lock:
[   49.365325]  (&mm->mmap_sem){++++}, at: [<00000000beebe6e2>] __do_page_faul...
[   49.365329] 
               which lock already depends on the new lock.

[   49.365330] 
               the existing dependency chain (in reverse order) is:
[   49.365331] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   25.675324] ======================================================
[   25.675325] WARNING: possible circular locking dependency detected
[   25.675327] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   25.675328] ------------------------------------------------------
[   25.675329] debugfs_test/1470 is trying to acquire lock:
[   25.675330]  (&dev->struct_mutex){+.+.}, at: [<000000003d7e6291>] i915_mute...
[   25.675363] 
               but task is already holding lock:
[   25.675364]  (&mm->mmap_sem){++++}, at: [<00000000fcf2c010>] __do_page_faul...
[   25.675368] 
               which lock already depends on the new lock.

[   25.675369] 
               the existing dependency chain (in reverse order) is:
[   25.675370] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   41.854503] ======================================================
[   41.854504] WARNING: possible circular locking dependency detected
[   41.854506] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Tainted: G        W       
[   41.854507] ------------------------------------------------------
[   41.854508] debugfs_test/1351 is trying to acquire lock:
[   41.854509]  (&dev->struct_mutex){+.+.}, at: [<00000000f658f195>] i915_mute...
[   41.854554] 
               but task is already holding lock:
[   41.854555]  (&mm->mmap_sem){++++}, at: [<0000000044a54461>] __do_page_faul...
[   41.854560] 
               which lock already depends on the new lock.

[   41.854561] 
               the existing dependency chain (in reverse order) is:
[   41.854562] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   29.899907] ======================================================
[   29.899909] WARNING: possible circular locking dependency detected
[   29.899912] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Tainted: G        W       
[   29.899914] ------------------------------------------------------
[   29.899915] debugfs_test/1332 is trying to acquire lock:
[   29.899917]  (&dev->struct_mutex){+.+.}, at: [<0000000051019758>] i915_mute...
[   29.899975] 
               but task is already holding lock:
[   29.899977]  (&mm->mmap_sem){++++}, at: [<0000000017be50b2>] __do_page_faul...
[   29.899984] 
               which lock already depends on the new lock.

[   29.899986] 
               the existing dependency chain (in reverse order) is:
[   29.899988] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   68.844131] ======================================================
[   68.844133] WARNING: possible circular locking dependency detected
[   68.844136] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[   68.844138] ------------------------------------------------------
[   68.844141] debugfs_test/1361 is trying to acquire lock:
[   68.844143]  (&dev->struct_mutex){+.+.}, at: [<000000005c6edddf>] i915_mute...
[   68.844277] 
               but task is already holding lock:
[   68.844279]  (&mm->mmap_sem){++++}, at: [<000000005f67a51a>] __do_page_faul...
[   68.844288] 
               which lock already depends on the new lock.

[   68.844291] 
               the existing dependency chain (in reverse order) is:
[   68.844293] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   47.800459] ======================================================
[   47.800461] WARNING: possible circular locking dependency detected
[   47.800465] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   47.800466] ------------------------------------------------------
[   47.800469] debugfs_test/1357 is trying to acquire lock:
[   47.800471]  (&dev->struct_mutex){+.+.}, at: [<00000000e8fb1e94>] i915_mute...
[   47.800614] 
               but task is already holding lock:
[   47.800616]  (&mm->mmap_sem){++++}, at: [<000000002c705666>] __do_page_faul...
[   47.800625] 
               which lock already depends on the new lock.

[   47.800628] 
               the existing dependency chain (in reverse order) is:
[   47.800630] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   81.904220] ======================================================
[   81.904228] WARNING: possible circular locking dependency detected
[   81.904237] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   81.904244] ------------------------------------------------------
[   81.904252] debugfs_test/1269 is trying to acquire lock:
[   81.904260]  (&dev->struct_mutex){+.+.}, at: [<0000000096a509fa>] i915_mute...
[   81.904413] 
               but task is already holding lock:
[   81.904422]  (&mm->mmap_sem){++++}, at: [<00000000d40b88ac>] __do_page_faul...
[   81.904447] 
               which lock already depends on the new lock.

[   81.904459] 
               the existing dependency chain (in reverse order) is:
[   81.904468] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   45.537952] ======================================================
[   45.537954] WARNING: possible circular locking dependency detected
[   45.537956] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[   45.537957] ------------------------------------------------------
[   45.537959] debugfs_test/1360 is trying to acquire lock:
[   45.537961]  (&dev->struct_mutex){+.+.}, at: [<0000000051b6b891>] i915_mute...
[   45.538037] 
               but task is already holding lock:
[   45.538038]  (&mm->mmap_sem){++++}, at: [<000000004551e240>] __do_page_faul...
[   45.538045] 
               which lock already depends on the new lock.

[   45.538047] 
               the existing dependency chain (in reverse order) is:
[   45.538048] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   26.328945] ======================================================
[   26.328947] WARNING: possible circular locking dependency detected
[   26.328950] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   26.328951] ------------------------------------------------------
[   26.328953] debugfs_test/1334 is trying to acquire lock:
[   26.328955]  (&dev->struct_mutex){+.+.}, at: [<0000000009fbc2df>] i915_mute...
[   26.329037] 
               but task is already holding lock:
[   26.329038]  (&mm->mmap_sem){++++}, at: [<00000000c845a997>] __do_page_faul...
[   26.329045] 
               which lock already depends on the new lock.

[   26.329048] 
               the existing dependency chain (in reverse order) is:
[   26.329050] 
               -> #6 (&mm->mmap_sem){++++}:
...

[  111.615701] ======================================================
[  111.615703] WARNING: possible circular locking dependency detected
[  111.615707] 4.15.0-rc2-g761e05a702f5-dmnf_6+ #1 Not tainted
[  111.615709] ------------------------------------------------------
[  111.615712] debugfs_test/1372 is trying to acquire lock:
[  111.615715]  (&dev->struct_mutex){+.+.}, at: [<00000000e1e88985>] i915_mute...
[  111.615874] 
               but task is already holding lock:
[  111.615876]  (&mm->mmap_sem){++++}, at: [<00000000b3e26fb8>] __do_page_faul...
[  111.615889] 
               which lock already depends on the new lock.

[  111.615892] 
               the existing dependency chain (in reverse order) is:
[  111.615895] 
               -> #6 (&mm->mmap_sem){++++}:
...

[   77.395061] ======================================================
[   77.395065] WARNING: possible circular locking dependency detected
[   77.395070] 4.15.0-rc2-g5bffee867df7-dmnf_5+ #1 Not tainted
[   77.395071] ------------------------------------------------------
[   77.395074] debugfs_test/1374 is trying to acquire lock:
[   77.395076]  (&dev->struct_mutex){+.+.}, at: [<00000000f8528a83>] i915_mute...
[   77.395231] 
               but task is already holding lock:
[   77.395234]  (&mm->mmap_sem){++++}, at: [<00000000393b90b6>] __do_page_faul...
[   77.395246] 
               which lock already depends on the new lock.

[   77.395249] 
               the existing dependency chain (in reverse order) is:
[   77.395252] 
               -> #6 (&mm->mmap_sem){++++}:
...