commit 7ce42ae67c49204c0b2252edd06f7920e0a51037 cause various errors

François Valenduc francoisvalenduc at gmail.com
Sun Mar 22 09:26:10 PDT 2015 

Hello everybody,

It seems commit 7ce42ae67c49204c0b2252edd06f7920e0a51037 causes several
errors. Here is what I got in dmesg:

Mar 22 15:54:45 pc-francois kernel: [    0.580964] ------------[ cut
here ]------------
Mar 22 15:54:45 pc-francois kernel: [    0.580971] WARNING: CPU: 1 PID:
1 at include/linux/kref.h:47 drm_framebuffer_reference+0x3b/0x70()
Mar 22 15:54:45 pc-francois kernel: [    0.580977] Modules linked in:
Mar 22 15:54:45 pc-francois kernel: [    0.580982] CPU: 1 PID: 1 Comm:
swapper/0 Not tainted 4.0.0-rc4+ #17
Mar 22 15:54:45 pc-francois kernel: [    0.580985] Hardware name:
TOSHIBA SATELLITE C70-A/Type2 - Board Product Name1, BIOS 1.00 04/30/2013
Mar 22 15:54:45 pc-francois kernel: [    0.580991]  0000000000000000
ffffffff814e40fd ffffffff813f9755 0000000000000000
Mar 22 15:54:45 pc-francois kernel: [    0.580998]  ffffffff8103bad7
ffff880145e4d3c0 ffff880145e51840 ffff8800a9d40000
Mar 22 15:54:45 pc-francois kernel: [    0.581004]  0000000000000000
ffff8800a9d40000 ffffffff8125ccbb ffff880145e4d3c0
Mar 22 15:54:45 pc-francois kernel: [    0.581010] Call Trace:
Mar 22 15:54:45 pc-francois kernel: [    0.581016]  [<ffffffff813f9755>]
? dump_stack+0x47/0x67
Mar 22 15:54:45 pc-francois kernel: [    0.581022]  [<ffffffff8103bad7>]
? warn_slowpath_common+0x77/0xb0
Mar 22 15:54:45 pc-francois kernel: [    0.581026]  [<ffffffff8125ccbb>]
? drm_framebuffer_reference+0x3b/0x70
Mar 22 15:54:45 pc-francois kernel: [    0.581032]  [<ffffffff8126bf97>]
? drm_atomic_set_fb_for_plane+0x27/0x90
Mar 22 15:54:45 pc-francois kernel: [    0.581037]  [<ffffffff812cd5f1>]
? intel_modeset_init+0x971/0x18c0
Mar 22 15:54:45 pc-francois kernel: [    0.581042]  [<ffffffff812ade3e>]
? gen6_write32+0x2e/0xa0
Mar 22 15:54:45 pc-francois kernel: [    0.581048]  [<ffffffff8129d22c>]
? ironlake_irq_postinstall+0xbc/0x180
Mar 22 15:54:45 pc-francois kernel: [    0.581053]  [<ffffffff812fe22a>]
? i915_driver_load+0xb2a/0x1080
Mar 22 15:54:45 pc-francois kernel: [    0.581058]  [<ffffffff8106b1ef>]
? __wake_up+0x2f/0x50
Mar 22 15:54:45 pc-francois kernel: [    0.581062]  [<ffffffff8104c5f8>]
? call_usermodehelper_exec+0x88/0x120
Mar 22 15:54:45 pc-francois kernel: [    0.581067]  [<ffffffff81040000>]
? walk_system_ram_range+0x80/0xe0
Mar 22 15:54:45 pc-francois kernel: [    0.581072]  [<ffffffff811a0195>]
? kobject_uevent_env+0x105/0x550
Mar 22 15:54:45 pc-francois kernel: [    0.581077]  [<ffffffff813044a2>]
? get_device+0x12/0x30
Mar 22 15:54:45 pc-francois kernel: [    0.581081]  [<ffffffff813f358f>]
? klist_add_tail+0x1f/0x50
Mar 22 15:54:45 pc-francois kernel: [    0.581085]  [<ffffffff813058dd>]
? device_add+0x15d/0x560
Mar 22 15:54:45 pc-francois kernel: [    0.581091]  [<ffffffff81257d3c>]
? drm_dev_register+0x9c/0xf0
Mar 22 15:54:45 pc-francois kernel: [    0.581095]  [<ffffffff81259b0d>]
? drm_get_pci_dev+0xad/0x1e0
Mar 22 15:54:45 pc-francois kernel: [    0.581100]  [<ffffffff81311207>]
? __pm_runtime_resume+0x47/0x60
Mar 22 15:54:45 pc-francois kernel: [    0.581105]  [<ffffffff811cd678>]
? pci_device_probe+0x78/0xd0
Mar 22 15:54:45 pc-francois kernel: [    0.581110]  [<ffffffff81308409>]
? driver_probe_device+0x79/0x260
Mar 22 15:54:45 pc-francois kernel: [    0.581115]  [<ffffffff813086bb>]
? __driver_attach+0x7b/0x80
Mar 22 15:54:45 pc-francois kernel: [    0.581119]  [<ffffffff81308640>]
? __device_attach+0x50/0x50
Mar 22 15:54:45 pc-francois kernel: [    0.581124]  [<ffffffff813067f3>]
? bus_for_each_dev+0x53/0x90
Mar 22 15:54:45 pc-francois kernel: [    0.581128]  [<ffffffff81307c08>]
? bus_add_driver+0x178/0x230
Mar 22 15:54:45 pc-francois kernel: [    0.581133]  [<ffffffff815e6d58>]
? mipi_dsi_bus_init+0xc/0xc
Mar 22 15:54:45 pc-francois kernel: [    0.581138]  [<ffffffff81308c5e>]
? driver_register+0x5e/0xf0
Mar 22 15:54:45 pc-francois kernel: [    0.581143]  [<ffffffff810002c4>]
? do_one_initcall+0x84/0x1c0
Mar 22 15:54:45 pc-francois kernel: [    0.581147]  [<ffffffff8105365a>]
? parse_args+0x20a/0x3c0
Mar 22 15:54:45 pc-francois kernel: [    0.581153]  [<ffffffff815c403f>]
? kernel_init_freeable+0x109/0x18e
Mar 22 15:54:45 pc-francois kernel: [    0.581157]  [<ffffffff815c3889>]
? initcall_blacklist+0xaa/0xaa
Mar 22 15:54:45 pc-francois kernel: [    0.581161]  [<ffffffff813f5310>]
? rest_init+0x80/0x80
Mar 22 15:54:45 pc-francois kernel: [    0.581165]  [<ffffffff813f5319>]
? kernel_init+0x9/0xe0
Mar 22 15:54:45 pc-francois kernel: [    0.581169]  [<ffffffff813febc8>]
? ret_from_fork+0x58/0x90
Mar 22 15:54:45 pc-francois kernel: [    0.581173]  [<ffffffff813f5310>]
? rest_init+0x80/0x80
Mar 22 15:54:45 pc-francois kernel: [    0.581179] ---[ end trace
317f8293ec836a06 ]---

Another one is the following:

Mar 22 15:54:45 pc-francois kernel: [    0.597228] ------------[ cut
here ]------------
Mar 22 15:54:45 pc-francois kernel: [    0.597233] WARNING: CPU: 1 PID:
6 at drivers/gpu/drm/drm_atomic.c:482 drm_atomic_check_only+0x35d/0x510()
Mar 22 15:54:45 pc-francois kernel: [    0.597235] Modules linked in:
Mar 22 15:54:45 pc-francois kernel: [    0.597237] CPU: 1 PID: 6 Comm:
kworker/u16:0 Tainted: G        W       4.0.0-rc4+ #17
Mar 22 15:54:45 pc-francois kernel: [    0.597237] Hardware name:
TOSHIBA SATELLITE C70-A/Type2 - Board Product Name1, BIOS 1.00 04/30/2013
Mar 22 15:54:45 pc-francois kernel: [    0.597240] Workqueue:
events_unbound async_run_entry_fn
Mar 22 15:54:45 pc-francois kernel: [    0.597242]  0000000000000000
ffffffff81518838 ffffffff813f9755 0000000000000000
Mar 22 15:54:45 pc-francois kernel: [    0.597243]  ffffffff8103bad7
0000000000000048 0000000000000000 ffff8800a9e84840
Mar 22 15:54:45 pc-francois kernel: [    0.597244]  ffff8800a9e87720
ffff880149f17800 ffffffff8126ba2d ffff880149f17800
Mar 22 15:54:45 pc-francois kernel: [    0.597244] Call Trace:
Mar 22 15:54:45 pc-francois kernel: [    0.597248]  [<ffffffff813f9755>]
? dump_stack+0x47/0x67
Mar 22 15:54:45 pc-francois kernel: [    0.597250]  [<ffffffff8103bad7>]
? warn_slowpath_common+0x77/0xb0
Mar 22 15:54:45 pc-francois kernel: [    0.597251]  [<ffffffff8126ba2d>]
? drm_atomic_check_only+0x35d/0x510
Mar 22 15:54:45 pc-francois kernel: [    0.597254]  [<ffffffff810d4c31>]
? kmemdup+0x31/0x40
Mar 22 15:54:45 pc-francois kernel: [    0.597255]  [<ffffffff8126bbf1>]
? drm_atomic_commit+0x11/0x60
Mar 22 15:54:45 pc-francois kernel: [    0.597257]  [<ffffffff8124bb65>]
? drm_atomic_helper_plane_set_property+0x85/0xd0
Mar 22 15:54:45 pc-francois kernel: [    0.597258]  [<ffffffff8126a8af>]
? drm_modeset_lock+0x2f/0xe0
Mar 22 15:54:45 pc-francois kernel: [    0.597260]  [<ffffffff8125caaf>]
? drm_mode_plane_set_obj_prop+0x1f/0x80
Mar 22 15:54:45 pc-francois kernel: [    0.597261]  [<ffffffff8124d23a>]
? restore_fbdev_mode+0x5a/0xe0
Mar 22 15:54:45 pc-francois kernel: [    0.597263]  [<ffffffff8124f1ab>]
? drm_fb_helper_restore_fbdev_mode_unlocked+0x1b/0x60
Mar 22 15:54:45 pc-francois kernel: [    0.597264]  [<ffffffff8124f20d>]
? drm_fb_helper_set_par+0x1d/0x40
Mar 22 15:54:45 pc-francois kernel: [    0.597266]  [<ffffffff812d9e71>]
? intel_fbdev_set_par+0x11/0x60
Mar 22 15:54:45 pc-francois kernel: [    0.597267]  [<ffffffff811e423a>]
? fbcon_init+0x56a/0x5f0
Mar 22 15:54:45 pc-francois kernel: [    0.597269]  [<ffffffff8123934c>]
? visual_init+0xac/0x110
Mar 22 15:54:45 pc-francois kernel: [    0.597270]  [<ffffffff8123b408>]
? do_bind_con_driver+0x158/0x390
Mar 22 15:54:45 pc-francois kernel: [    0.597272]  [<ffffffff8123bb93>]
? do_take_over_console+0x103/0x1b0
Mar 22 15:54:45 pc-francois kernel: [    0.597273]  [<ffffffff811e431b>]
? do_fbcon_takeover+0x5b/0xc0
Mar 22 15:54:45 pc-francois kernel: [    0.597274]  [<ffffffff81054906>]
? notifier_call_chain+0x46/0x70
Mar 22 15:54:45 pc-francois kernel: [    0.597276]  [<ffffffff81054c04>]
? __blocking_notifier_call_chain+0x44/0x60
Mar 22 15:54:45 pc-francois kernel: [    0.597278]  [<ffffffff811ec3ae>]
? register_framebuffer+0x1de/0x310
Mar 22 15:54:45 pc-francois kernel: [    0.597279]  [<ffffffff8124f482>]
? drm_fb_helper_initial_config+0x252/0x3b0
Mar 22 15:54:45 pc-francois kernel: [    0.597281]  [<ffffffff81055efd>]
? async_run_entry_fn+0x2d/0xe0
Mar 22 15:54:45 pc-francois kernel: [    0.597283]  [<ffffffff8104f1b5>]
? process_one_work+0x125/0x320
Mar 22 15:54:45 pc-francois kernel: [    0.597284]  [<ffffffff8104cd03>]
? pwq_activate_delayed_work+0x23/0x30
Mar 22 15:54:45 pc-francois kernel: [    0.597286]  [<ffffffff8104fb84>]
? worker_thread+0x114/0x460
Mar 22 15:54:45 pc-francois kernel: [    0.597287]  [<ffffffff8104fa70>]
? cancel_delayed_work_sync+0x10/0x10
Mar 22 15:54:45 pc-francois kernel: [    0.597288]  [<ffffffff81053cdc>]
? kthread+0xbc/0xe0
Mar 22 15:54:45 pc-francois kernel: [    0.597290]  [<ffffffff81050000>]
? schedule_on_each_cpu+0x40/0x100
Mar 22 15:54:45 pc-francois kernel: [    0.597291]  [<ffffffff81053c20>]
? kthread_create_on_node+0x170/0x170
Mar 22 15:54:45 pc-francois kernel: [    0.597292]  [<ffffffff813febc8>]
? ret_from_fork+0x58/0x90
Mar 22 15:54:45 pc-francois kernel: [    0.597293]  [<ffffffff81053c20>]
? kthread_create_on_node+0x170/0x170
Mar 22 15:54:45 pc-francois kernel: [    0.597294] ---[ end trace
317f8293ec836a08 ]---

A third one is the following:
Mar 22 15:54:45 pc-francois kernel: [    0.580964] ------------[ cut
here ]------------
Mar 22 15:54:45 pc-francois kernel: [    0.580971] WARNING: CPU: 1 PID:
1 at include/linux/kref.h:47 drm_framebuffer_reference+0x3b/0x70()
Mar 22 15:54:45 pc-francois kernel: [    0.580977] Modules linked in:
Mar 22 15:54:45 pc-francois kernel: [    0.580982] CPU: 1 PID: 1 Comm:
swapper/0 Not tainted 4.0.0-rc4+ #17
Mar 22 15:54:45 pc-francois kernel: [    0.580985] Hardware name:
TOSHIBA SATELLITE C70-A/Type2 - Board Product Name1, BIOS 1.00 04/30/2013
Mar 22 15:54:45 pc-francois kernel: [    0.580991]  0000000000000000
ffffffff814e40fd ffffffff813f9755 0000000000000000
Mar 22 15:54:45 pc-francois kernel: [    0.580998]  ffffffff8103bad7
ffff880145e4d3c0 ffff880145e51840 ffff8800a9d40000
Mar 22 15:54:45 pc-francois kernel: [    0.581004]  0000000000000000
ffff8800a9d40000 ffffffff8125ccbb ffff880145e4d3c0
Mar 22 15:54:45 pc-francois kernel: [    0.581010] Call Trace:
Mar 22 15:54:45 pc-francois kernel: [    0.581016]  [<ffffffff813f9755>]
? dump_stack+0x47/0x67
Mar 22 15:54:45 pc-francois kernel: [    0.581022]  [<ffffffff8103bad7>]
? warn_slowpath_common+0x77/0xb0
Mar 22 15:54:45 pc-francois kernel: [    0.581026]  [<ffffffff8125ccbb>]
? drm_framebuffer_reference+0x3b/0x70
Mar 22 15:54:45 pc-francois kernel: [    0.581032]  [<ffffffff8126bf97>]
? drm_atomic_set_fb_for_plane+0x27/0x90
Mar 22 15:54:45 pc-francois kernel: [    0.581037]  [<ffffffff812cd5f1>]
? intel_modeset_init+0x971/0x18c0
Mar 22 15:54:45 pc-francois kernel: [    0.581042]  [<ffffffff812ade3e>]
? gen6_write32+0x2e/0xa0
Mar 22 15:54:45 pc-francois kernel: [    0.581048]  [<ffffffff8129d22c>]
? ironlake_irq_postinstall+0xbc/0x180
Mar 22 15:54:45 pc-francois kernel: [    0.581053]  [<ffffffff812fe22a>]
? i915_driver_load+0xb2a/0x1080
Mar 22 15:54:45 pc-francois kernel: [    0.581058]  [<ffffffff8106b1ef>]
? __wake_up+0x2f/0x50
Mar 22 15:54:45 pc-francois kernel: [    0.581062]  [<ffffffff8104c5f8>]
? call_usermodehelper_exec+0x88/0x120
Mar 22 15:54:45 pc-francois kernel: [    0.581067]  [<ffffffff81040000>]
? walk_system_ram_range+0x80/0xe0
Mar 22 15:54:45 pc-francois kernel: [    0.581072]  [<ffffffff811a0195>]
? kobject_uevent_env+0x105/0x550
Mar 22 15:54:45 pc-francois kernel: [    0.581077]  [<ffffffff813044a2>]
? get_device+0x12/0x30
Mar 22 15:54:45 pc-francois kernel: [    0.581081]  [<ffffffff813f358f>]
? klist_add_tail+0x1f/0x50
Mar 22 15:54:45 pc-francois kernel: [    0.581085]  [<ffffffff813058dd>]
? device_add+0x15d/0x560
Mar 22 15:54:45 pc-francois kernel: [    0.581091]  [<ffffffff81257d3c>]
? drm_dev_register+0x9c/0xf0
Mar 22 15:54:45 pc-francois kernel: [    0.581095]  [<ffffffff81259b0d>]
? drm_get_pci_dev+0xad/0x1e0
Mar 22 15:54:45 pc-francois kernel: [    0.581100]  [<ffffffff81311207>]
? __pm_runtime_resume+0x47/0x60
Mar 22 15:54:45 pc-francois kernel: [    0.581105]  [<ffffffff811cd678>]
? pci_device_probe+0x78/0xd0
Mar 22 15:54:45 pc-francois kernel: [    0.581110]  [<ffffffff81308409>]
? driver_probe_device+0x79/0x260
Mar 22 15:54:45 pc-francois kernel: [    0.581115]  [<ffffffff813086bb>]
? __driver_attach+0x7b/0x80
Mar 22 15:54:45 pc-francois kernel: [    0.581119]  [<ffffffff81308640>]
? __device_attach+0x50/0x50
Mar 22 15:54:45 pc-francois kernel: [    0.581124]  [<ffffffff813067f3>]
? bus_for_each_dev+0x53/0x90
Mar 22 15:54:45 pc-francois kernel: [    0.581128]  [<ffffffff81307c08>]
? bus_add_driver+0x178/0x230
Mar 22 15:54:45 pc-francois kernel: [    0.581133]  [<ffffffff815e6d58>]
? mipi_dsi_bus_init+0xc/0xc
Mar 22 15:54:45 pc-francois kernel: [    0.581138]  [<ffffffff81308c5e>]
? driver_register+0x5e/0xf0
Mar 22 15:54:45 pc-francois kernel: [    0.581143]  [<ffffffff810002c4>]
? do_one_initcall+0x84/0x1c0
Mar 22 15:54:45 pc-francois kernel: [    0.581147]  [<ffffffff8105365a>]
? parse_args+0x20a/0x3c0
Mar 22 15:54:45 pc-francois kernel: [    0.581153]  [<ffffffff815c403f>]
? kernel_init_freeable+0x109/0x18e
Mar 22 15:54:45 pc-francois kernel: [    0.581157]  [<ffffffff815c3889>]
? initcall_blacklist+0xaa/0xaa
Mar 22 15:54:45 pc-francois kernel: [    0.581161]  [<ffffffff813f5310>]
? rest_init+0x80/0x80
Mar 22 15:54:45 pc-francois kernel: [    0.581165]  [<ffffffff813f5319>]
? kernel_init+0x9/0xe0
Mar 22 15:54:45 pc-francois kernel: [    0.581169]  [<ffffffff813febc8>]
? ret_from_fork+0x58/0x90
Mar 22 15:54:45 pc-francois kernel: [    0.581173]  [<ffffffff813f5310>]
? rest_init+0x80/0x80
Mar 22 15:54:45 pc-francois kernel: [    0.581179] ---[ end trace
317f8293ec836a06 ]---

Finally, a fourth one is the following:

Mar 22 15:54:45 pc-francois kernel: [    0.597233] WARNING: CPU: 1 PID:
6 at drivers/gpu/drm/drm_atomic.c:482 drm_atomic_check_only+0x35d/0x510()
Mar 22 15:54:45 pc-francois kernel: [    0.597235] Modules linked in:
Mar 22 15:54:45 pc-francois kernel: [    0.597237] CPU: 1 PID: 6 Comm:
kworker/u16:0 Tainted: G        W       4.0.0-rc4+ #17
Mar 22 15:54:45 pc-francois kernel: [    0.597237] Hardware name:
TOSHIBA SATELLITE C70-A/Type2 - Board Product Name1, BIOS 1.00 04/30/2013
Mar 22 15:54:45 pc-francois kernel: [    0.597240] Workqueue:
events_unbound async_run_entry_fn
Mar 22 15:54:45 pc-francois kernel: [    0.597242]  0000000000000000
ffffffff81518838 ffffffff813f9755 0000000000000000
Mar 22 15:54:45 pc-francois kernel: [    0.597243]  ffffffff8103bad7
0000000000000048 0000000000000000 ffff8800a9e84840
Mar 22 15:54:45 pc-francois kernel: [    0.597244]  ffff8800a9e87720
ffff880149f17800 ffffffff8126ba2d ffff880149f17800
Mar 22 15:54:45 pc-francois kernel: [    0.597244] Call Trace:
Mar 22 15:54:45 pc-francois kernel: [    0.597248]  [<ffffffff813f9755>]
? dump_stack+0x47/0x67
Mar 22 15:54:45 pc-francois kernel: [    0.597250]  [<ffffffff8103bad7>]
? warn_slowpath_common+0x77/0xb0
Mar 22 15:54:45 pc-francois kernel: [    0.597251]  [<ffffffff8126ba2d>]
? drm_atomic_check_only+0x35d/0x510
Mar 22 15:54:45 pc-francois kernel: [    0.597254]  [<ffffffff810d4c31>]
? kmemdup+0x31/0x40
Mar 22 15:54:45 pc-francois kernel: [    0.597255]  [<ffffffff8126bbf1>]
? drm_atomic_commit+0x11/0x60
Mar 22 15:54:45 pc-francois kernel: [    0.597257]  [<ffffffff8124bb65>]
? drm_atomic_helper_plane_set_property+0x85/0xd0
Mar 22 15:54:45 pc-francois kernel: [    0.597258]  [<ffffffff8126a8af>]
? drm_modeset_lock+0x2f/0xe0
Mar 22 15:54:45 pc-francois kernel: [    0.597260]  [<ffffffff8125caaf>]
? drm_mode_plane_set_obj_prop+0x1f/0x80
Mar 22 15:54:45 pc-francois kernel: [    0.597261]  [<ffffffff8124d23a>]
? restore_fbdev_mode+0x5a/0xe0
Mar 22 15:54:45 pc-francois kernel: [    0.597263]  [<ffffffff8124f1ab>]
? drm_fb_helper_restore_fbdev_mode_unlocked+0x1b/0x60
Mar 22 15:54:45 pc-francois kernel: [    0.597264]  [<ffffffff8124f20d>]
? drm_fb_helper_set_par+0x1d/0x40
Mar 22 15:54:45 pc-francois kernel: [    0.597266]  [<ffffffff812d9e71>]
? intel_fbdev_set_par+0x11/0x60
Mar 22 15:54:45 pc-francois kernel: [    0.597267]  [<ffffffff811e423a>]
? fbcon_init+0x56a/0x5f0
Mar 22 15:54:45 pc-francois kernel: [    0.597269]  [<ffffffff8123934c>]
? visual_init+0xac/0x110
Mar 22 15:54:45 pc-francois kernel: [    0.597270]  [<ffffffff8123b408>]
? do_bind_con_driver+0x158/0x390
Mar 22 15:54:45 pc-francois kernel: [    0.597272]  [<ffffffff8123bb93>]
? do_take_over_console+0x103/0x1b0
Mar 22 15:54:45 pc-francois kernel: [    0.597273]  [<ffffffff811e431b>]
? do_fbcon_takeover+0x5b/0xc0
Mar 22 15:54:45 pc-francois kernel: [    0.597274]  [<ffffffff81054906>]
? notifier_call_chain+0x46/0x70
Mar 22 15:54:45 pc-francois kernel: [    0.597276]  [<ffffffff81054c04>]
? __blocking_notifier_call_chain+0x44/0x60
Mar 22 15:54:45 pc-francois kernel: [    0.597278]  [<ffffffff811ec3ae>]
? register_framebuffer+0x1de/0x310
Mar 22 15:54:45 pc-francois kernel: [    0.597279]  [<ffffffff8124f482>]
? drm_fb_helper_initial_config+0x252/0x3b0
Mar 22 15:54:45 pc-francois kernel: [    0.597281]  [<ffffffff81055efd>]
? async_run_entry_fn+0x2d/0xe0
Mar 22 15:54:45 pc-francois kernel: [    0.597283]  [<ffffffff8104f1b5>]
? process_one_work+0x125/0x320
Mar 22 15:54:45 pc-francois kernel: [    0.597284]  [<ffffffff8104cd03>]
? pwq_activate_delayed_work+0x23/0x30
Mar 22 15:54:45 pc-francois kernel: [    0.597286]  [<ffffffff8104fb84>]
? worker_thread+0x114/0x460
Mar 22 15:54:45 pc-francois kernel: [    0.597287]  [<ffffffff8104fa70>]
? cancel_delayed_work_sync+0x10/0x10
Mar 22 15:54:45 pc-francois kernel: [    0.597288]  [<ffffffff81053cdc>]
? kthread+0xbc/0xe0
Mar 22 15:54:45 pc-francois kernel: [    0.597290]  [<ffffffff81050000>]
? schedule_on_each_cpu+0x40/0x100
Mar 22 15:54:45 pc-francois kernel: [    0.597291]  [<ffffffff81053c20>]
? kthread_create_on_node+0x170/0x170
Mar 22 15:54:45 pc-francois kernel: [    0.597292]  [<ffffffff813febc8>]
? ret_from_fork+0x58/0x90
Mar 22 15:54:45 pc-francois kernel: [    0.597293]  [<ffffffff81053c20>]
? kthread_create_on_node+0x170/0x170
Mar 22 15:54:45 pc-francois kernel: [    0.597294] ---[ end trace
317f8293ec836a08 ]---

Can somebody explain what is happening ? If I revert this commit, these
errors dont' occur.

Thanks in advance for your help,

François Valenduc

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