Chris Wilson 2214ddc2fd drm/mm: Allow drm_mm_initialized() to be used outside of the locks ...

Mark up the potential racy read in drm_mm_initialized(), as we want a
cheap and cheerful check:

[  121.098731] BUG: KCSAN: data-race in _i915_gem_object_create_stolen [i915] / rm_hole
[  121.098766]
[  121.098789] write (marked) to 0xffff8881f01ed330 of 8 bytes by task 3568 on cpu 3:
[  121.098831]  rm_hole+0x64/0x140
[  121.098860]  drm_mm_insert_node_in_range+0x3d3/0x6c0
[  121.099254]  i915_gem_stolen_insert_node_in_range+0x91/0xe0 [i915]
[  121.099646]  _i915_gem_object_create_stolen+0x9d/0x100 [i915]
[  121.100047]  i915_gem_object_create_region+0x7a/0xa0 [i915]
[  121.100451]  i915_gem_object_create_stolen+0x33/0x50 [i915]
[  121.100849]  intel_engine_create_ring+0x1af/0x280 [i915]
[  121.101242]  __execlists_context_alloc+0xce/0x3d0 [i915]
[  121.101635]  execlists_context_alloc+0x25/0x40 [i915]
[  121.102030]  intel_context_alloc_state+0xb6/0xf0 [i915]
[  121.102420]  __intel_context_do_pin+0x1ff/0x220 [i915]
[  121.102815]  i915_gem_do_execbuffer+0x46b4/0x4c20 [i915]
[  121.103211]  i915_gem_execbuffer2_ioctl+0x2c3/0x580 [i915]
[  121.103244]  drm_ioctl_kernel+0xe4/0x120
[  121.103269]  drm_ioctl+0x297/0x4c7
[  121.103296]  ksys_ioctl+0x89/0xb0
[  121.103321]  __x64_sys_ioctl+0x42/0x60
[  121.103349]  do_syscall_64+0x6e/0x2c0
[  121.103377]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  121.103403]
[  121.103426] read to 0xffff8881f01ed330 of 8 bytes by task 3109 on cpu 1:
[  121.103819]  _i915_gem_object_create_stolen+0x30/0x100 [i915]
[  121.104228]  i915_gem_object_create_region+0x7a/0xa0 [i915]
[  121.104631]  i915_gem_object_create_stolen+0x33/0x50 [i915]
[  121.105025]  intel_engine_create_ring+0x1af/0x280 [i915]
[  121.105420]  __execlists_context_alloc+0xce/0x3d0 [i915]
[  121.105818]  execlists_context_alloc+0x25/0x40 [i915]
[  121.106202]  intel_context_alloc_state+0xb6/0xf0 [i915]
[  121.106595]  __intel_context_do_pin+0x1ff/0x220 [i915]
[  121.106985]  i915_gem_do_execbuffer+0x46b4/0x4c20 [i915]
[  121.107375]  i915_gem_execbuffer2_ioctl+0x2c3/0x580 [i915]
[  121.107409]  drm_ioctl_kernel+0xe4/0x120
[  121.107437]  drm_ioctl+0x297/0x4c7
[  121.107464]  ksys_ioctl+0x89/0xb0
[  121.107489]  __x64_sys_ioctl+0x42/0x60
[  121.107511]  do_syscall_64+0x6e/0x2c0
[  121.107535]  entry_SYSCALL_64_after_hwframe+0x44/0xa9

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20200309121529.16497-1-chris@chris-wilson.co.uk

2020-03-16 10:31:21 +00:00

..

bridge

drm/bridge: synopsys: dw-hdmi: allow ycbcr420 modes for >= 0x200a

2020-03-10 10:51:24 +01:00

i2c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

ttm

drm/ttm: rework BO delayed delete. v2

2020-02-12 13:03:27 +01:00

amd_asic_type.h

drm/amdgpu: Add a kernel parameter for specifying the asic type

2019-09-16 09:54:25 -05:00

drm_agpsupport.h

drm/agp: Remove unused function drm_agp_bind_pages

2019-07-15 18:11:30 +02:00

drm_atomic_helper.h

drm/bridge: Add the necessary bits to support bus format negotiation

2020-01-31 16:39:53 +01:00

drm_atomic_state_helper.h

drm/bridge: Add a drm_bridge_state object

2020-01-31 16:00:21 +01:00

drm_atomic_uapi.h

drm: extract drm_atomic_uapi.c

2018-09-09 14:19:18 +02:00

drm_atomic.h

drm/bridge: Fix the bridge kernel doc

2020-02-18 16:50:45 +01:00

drm_audio_component.h

Merge tag 'topic/mei-hdcp-2019-02-19' of git://anongit.freedesktop.org/drm/drm-intel into drm-intel-next-queued

2019-02-20 11:53:48 +02:00

drm_auth.h

drm: make drm/drm_auth.h self contained

2019-05-27 18:05:44 +02:00

drm_blend.h

drm: Add per-plane pixel blend mode property

2018-08-24 17:31:37 +01:00

drm_bridge_connector.h

drm: Add helper to create a connector for a chain of bridges

2020-02-26 13:31:41 +02:00

drm_bridge.h

drm/bridge: Extend bridge API to disable connector creation

2020-02-26 13:31:23 +02:00

drm_cache.h

MIPS: Loongson64: Rename CPU TYPES

2019-10-31 15:03:10 -07:00

drm_client.h

drm/client: Rename _force to _locked

2020-02-11 15:03:08 +01:00

drm_color_mgmt.h

drm: Inline drm_color_lut_extract()

2019-11-29 21:29:17 +02:00

drm_connector.h

drm/edid: Add function to parse EDID descriptors for monitor range

2020-03-11 13:13:00 -07:00

drm_crtc_helper.h

drm: Split out drm_probe_helper.h

2019-01-24 13:20:42 +01:00

drm_crtc.h

drm: Add get_vblank_timestamp() to struct drm_crtc_funcs

2020-02-13 13:08:13 +01:00

drm_damage_helper.h

drm/damage-helper: Add drm_atomic_helper_damage_merged()

2019-01-17 10:56:54 +01:00

drm_debugfs_crc.h

drm/crc: Only report a single overflow when a CRC fd is opened

2018-07-06 14:57:03 +02:00

drm_debugfs.h

drm: drm_debugfs.h self-contained

2019-06-10 22:30:24 +02:00

drm_device.h

drm: Avoid drm_global_mutex for simple inc/dec of dev->open_count

2020-01-24 17:41:34 +00:00

drm_displayid.h

drm/edid: parse CEA blocks embedded in DisplayID

2019-06-25 14:32:26 +10:00

drm_dp_dual_mode_helper.h

drm: Fix LSPCON kernel-doc

2016-10-19 18:20:40 +03:00

drm_dp_helper.h

Merge v5.6-rc2 into drm-misc-next

2020-02-17 10:34:34 +01:00

drm_dp_mst_helper.h

drm/dp_mst: Convert drm_dp_mst_topology_mgr.is_waiting_for_dwn_reply to bitfield

2020-03-13 14:52:35 -04:00

drm_drv.h

drm: Clean-up VBLANK-related callbacks in struct drm_driver

2020-02-13 13:10:10 +01:00

drm_dsc.h

drm/dsc: Split DSC PPS and SDP header initialisations

2019-03-05 13:24:34 -05:00

drm_edid.h

drm/edid: Name the detailed monitor range flags

2020-03-11 13:12:38 -07:00

drm_encoder_slave.h

drm: remove include of drmP.h from drm_encoder_slave.h

2019-01-09 22:35:35 +01:00

drm_encoder.h

drm/bridge: Document the drm_encoder.bridge_chain field as private

2020-02-26 13:31:20 +02:00

drm_fb_cma_helper.h

drm/fb-cma-helpers: Fix include issue

2020-01-09 17:33:41 +01:00

drm_fb_helper.h

drm/fb-helper: Remove drm_fb_helper add, add_all and remove connector functions

2020-03-06 14:19:58 +01:00

drm_file.h

drm: Release filp before global lock

2020-01-24 17:41:34 +00:00

drm_fixed.h

drm: Add drm_fixp_from_fraction and drm_fixp2int_ceil

2016-02-05 15:23:48 +10:00

drm_flip_work.h

drm/kms-helpers: Use recommened kerneldoc for struct member refs

2017-01-25 16:18:57 +01:00

drm_format_helper.h

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

2019-05-30 11:26:32 -07:00

drm_fourcc.h

drm/fb: Extend format_info member arrays to handle four planes

2020-01-07 13:16:08 +02:00

drm_framebuffer.h

drm/fb: document dirty helper better

2019-06-11 18:02:48 +02:00

drm_gem_cma_helper.h

drm: remove drmP.h from drm_gem_cma_helper.h

2019-01-09 22:54:08 +01:00

drm_gem_framebuffer_helper.h

drm/fb: remove unused function: drm_gem_fbdev_fb_create()

2019-07-21 19:32:38 +02:00

drm_gem_shmem_helper.h

Merge v5.4-rc7 into drm-next

2019-11-14 05:53:10 +10:00

drm_gem_ttm_helper.h

drm/ttm: add drm_gem_ttm_mmap()

2019-10-17 13:59:16 +02:00

drm_gem_vram_helper.h

drm/vram: Add helpers to validate a display mode's memory requirements

2020-02-06 10:32:54 +01:00

drm_gem.h

drm: call drm_gem_object_funcs.mmap with fake offset

2019-12-06 11:18:11 +01:00

drm_hashtab.h

drm: drop extern from function decls

2017-03-24 09:36:06 +01:00

drm_hdcp.h

drm/hdcp: fix DRM_HDCP_2_KSV_COUNT_2_LSBITS

2020-03-04 06:35:07 +05:30

drm_ioctl.h

drm/ioctl: Ditch DRM_UNLOCKED except for the legacy vblank ioctl

2019-06-21 19:13:10 +02:00

drm_irq.h

drm: Extract drm_vblank.[hc]

2017-06-01 08:02:14 +02:00

drm_lease.h

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157

2019-05-30 11:26:37 -07:00

drm_legacy.h

drm: Remove the dma_alloc_coherent wrapper for internal usage

2020-02-04 23:57:26 +00:00

drm_mipi_dbi.h

drm/mipi_dbi: Add support for display offsets

2020-01-19 18:07:08 +01:00

drm_mipi_dsi.h

drm/dsi: add helpers for DSI compression mode and PPS packets

2019-11-07 15:00:16 +02:00

drm_mm.h

drm/mm: Allow drm_mm_initialized() to be used outside of the locks

2020-03-16 10:31:21 +00:00

drm_mode_config.h

drm: Add Content protection type property

2019-08-06 13:14:07 +05:30

drm_mode_object.h

drm: remove drm_mode_object_{un/reference} aliases

2018-03-19 09:09:46 -04:00

drm_modes.h

drm: drop unused drm_display_mode.private

2020-02-15 21:15:46 +01:00

drm_modeset_helper_vtables.h

drm: drop unused drm_crtc callback

2020-02-15 21:15:17 +01:00

drm_modeset_helper.h

drm: remove drmP.h from drm_modeset_helper.h

2019-02-07 21:48:34 +01:00

drm_modeset_lock.h

drm: Add drm_modeset_lock_assert_held()

2019-09-19 21:37:59 +03:00

drm_of.h

drm: of: Fix linking when CONFIG_OF is not set

2020-01-09 10:40:58 +10:00

drm_panel.h

drm/drm_panel: fix export of drm_panel_of_backlight, try #3

2020-01-12 21:16:30 +01:00

drm_pci.h

drm/pci: Unexport drm_get_pci_dev

2020-03-06 16:08:24 +01:00

drm_pciids.h

drm/radeon: change SPDX identifier to MIT

2018-10-15 16:16:12 -05:00

drm_plane_helper.h

drm: Unexport drm_plane_helper_check_update

2018-10-05 22:45:19 +02:00

drm_plane.h

drm/plane: Clarify our expectations for src/dst rectangles

2019-10-10 15:49:34 +02:00

drm_prime.h

drm/prime: Remove duplicate forward declaration

2019-09-16 17:32:51 +02:00

drm_print.h

drm/print: clean up RATELIMITED macros

2020-02-15 14:39:35 +01:00

drm_probe_helper.h

drm: Split out drm_probe_helper.h

2019-01-24 13:20:42 +01:00

drm_property.h

drm: Fix kernel doc for DRM_MODE_PROP_IMMUTABLE

2018-10-03 13:05:12 -07:00

drm_rect.h

drm/selftests: Add drm_rect selftests

2019-11-28 13:33:43 +02:00

drm_scdc_helper.h

drm/scdc: Fix typo in bit definition of SCDC_STATUS_FLAGS

2019-11-04 17:58:46 +01:00

drm_self_refresh_helper.h

drm/atomic: fix self-refresh helpers crtc state dereference

2019-11-06 13:00:21 -05:00

drm_simple_kms_helper.h

drm/simple-kms: Add drm_simple_encoder_{init,create}()

2020-03-02 09:22:35 +01:00

drm_syncobj.h

drm/syncobj: add new drm_syncobj_add_point interface v4

2019-04-01 12:05:53 +02:00

drm_sysfs.h

drm: uevent for connector status change

2019-08-06 13:16:54 +05:30

drm_util.h

drm: Move EXPORT_SYMBOL_FOR_TESTS_ONLY under a separate Kconfig

2019-11-07 21:22:15 +00:00

drm_utils.h

drm: export drm_timeout_abs_to_jiffies

2019-03-07 12:00:30 -06:00

drm_vblank.h

drm: Remove legacy version of get_scanout_position()

2020-02-13 13:10:10 +01:00

drm_vma_manager.h

drm: increase drm mmap_range size to 1TB

2019-04-24 16:20:23 -05:00

drm_writeback.h

drm: writeback: Add job prepare and cleanup operations

2019-03-18 17:24:38 +02:00

gma_drm.h

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 335

2019-06-05 17:37:06 +02:00

gpu_scheduler.h

drm/amdgpu: fix doc by clarifying sched_list definition

2020-01-27 16:46:44 -05:00

i915_component.h

drm/i915/tgl: Add additional ports for Tiger Lake

2019-07-11 16:31:14 -07:00

i915_drm.h

drm: Move port definition back to i915 header

2019-08-30 14:08:26 +05:30

i915_mei_hdcp_interface.h

drm: Extend I915 mei interface for transcoder info

2019-08-30 14:08:28 +05:30

i915_pciids.h

drm/i915/cml: Separate U series pci id from origianl list.

2019-12-12 22:15:16 +02:00

intel_lpe_audio.h

ALSA: x86: Register multiple PCM devices for the LPE audio card

2017-05-03 16:24:00 +03:00

intel-gtt.h

drm: include kernel.h and agp_backend.h from intel-gtt.h

2019-01-02 11:37:47 +02:00

spsc_queue.h

drm: move amd_gpu_scheduler into common location

2017-12-07 11:51:56 -05:00

task_barrier.h

drm: Add Reusable task barrier.

2019-12-18 16:09:12 -05:00