Daniel Vetter 2225cfe46b drm/gem: Use kref_get_unless_zero for the weak mmap references ... Compared to wrapping the final kref_put with dev->struct_mutex this allows us to only acquire the offset manager look both in the final cleanup and in the lookup. Which has the upside that no locks leak out of the core abstractions. But it means that we need to hold a temporary reference to the object while checking mmap constraints, to make sure the object doesn't disappear. Extended the critical region would have worked too, but would result in more leaky locking. Also, this is the final bit which required dev->struct_mutex in gem core, now modern drivers can be completely struct_mutex free! This needs a new drm_vma_offset_exact_lookup_locked and makes both drm_vma_offset_exact_lookup and drm_vma_offset_lookup unused. v2: Don't leak object references in failure paths (David). v3: Add a comment from Chris explaining how the ordering works, with the slight adjustment that I dropped any mention of struct_mutex since with this patch it's now immaterial ot core gem. Cc: David Herrmann <dh.herrmann@gmail.com> Reviewed-by: David Herrmann <dh.herrmann@gmail.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Link: http://mid.gmane.org/1444901623-18918-1-git-send-email-daniel.vetter@ffwll.ch Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>		2015-10-19 11:00:44 +02:00
..
amd	drm/<drivers>: Drop DRM_UNLOCKED from modeset drivers	2015-10-16 15:50:54 +02:00
armada	drm/<drivers>: Drop DRM_UNLOCKED from modeset drivers	2015-10-16 15:50:54 +02:00
ast	drm/ast: Don't grab dev->struct_mutex for in mmap offset ioctl	2015-08-10 13:36:55 +02:00
atmel-hlcdc	drm: Stop using drm_vblank_count() as the hw frame counter	2015-10-07 16:13:52 +02:00
bochs	drm/bochs: Don't grab dev->struct_mutex for in mmap offset ioctl	2015-08-10 13:37:04 +02:00
bridge	Merge branch 'drm-dwhdmi-devel' of git://ftp.arm.linux.org.uk/~rmk/linux-arm into drm-next	2015-08-27 13:01:57 +10:00
cirrus	drm/cirrus: Don't grab dev->struct_mutex for in mmap offset ioctl	2015-08-10 13:37:27 +02:00
exynos	drm/<drivers>: Drop DRM_UNLOCKED from modeset drivers	2015-10-16 15:50:54 +02:00
fsl-dcu	drm: Stop using drm_vblank_count() as the hw frame counter	2015-10-07 16:13:52 +02:00
gma500	drm/irq: Use unsigned int pipe in public API	2015-10-06 12:57:47 +02:00
i2c	Linux 4.3-rc2	2015-09-24 17:18:41 +02:00
i810
i915	drm/<drivers>: Drop DRM_UNLOCKED from modeset drivers	2015-10-16 15:50:54 +02:00
imx	drm: Stop using drm_vblank_count() as the hw frame counter	2015-10-07 16:13:52 +02:00
mga	drm/irq: Use unsigned int pipe in public API	2015-10-06 12:57:47 +02:00
mgag200	drm/mgag200: Fix driver_load error handling	2015-09-24 08:10:44 +10:00
msm	drm/gem: Drop struct_mutex requirement from drm_gem_mmap_obj	2015-10-16 15:51:00 +02:00
nouveau	drm/<drivers>: Drop DRM_UNLOCKED from modeset drivers	2015-10-16 15:50:54 +02:00
omapdrm	drm/gem: Drop struct_mutex requirement from drm_gem_mmap_obj	2015-10-16 15:51:00 +02:00
panel	drm/panel: Add support for LG LG4573 480x800 4.3" panel	2015-08-14 21:35:35 +02:00
qxl	drm/<drivers>: Drop DRM_UNLOCKED from modeset drivers	2015-10-16 15:50:54 +02:00
r128	drm/irq: Use unsigned int pipe in public API	2015-10-06 12:57:47 +02:00
radeon	drm/<drivers>: Drop DRM_UNLOCKED from modeset drivers	2015-10-16 15:50:54 +02:00
rcar-du	drm: Stop using drm_vblank_count() as the hw frame counter	2015-10-07 16:13:52 +02:00
rockchip	drm/gem: Drop struct_mutex requirement from drm_gem_mmap_obj	2015-10-16 15:51:00 +02:00
savage
shmobile	drm: Stop using drm_vblank_count() as the hw frame counter	2015-10-07 16:13:52 +02:00
sis
sti	drm: Stop using drm_vblank_count() as the hw frame counter	2015-10-07 16:13:52 +02:00
tdfx
tegra	drm/<drivers>: Drop DRM_UNLOCKED from modeset drivers	2015-10-16 15:50:54 +02:00
tilcdc	drm: Stop using drm_vblank_count() as the hw frame counter	2015-10-07 16:13:52 +02:00
ttm	drm/ttm: Fix memory space allocation v2	2015-09-15 00:57:01 -07:00
udl	drm/udl: Use new drm_fb_helper functions	2015-08-06 14:13:00 +02:00
vgem	drm/vgem: Drop vgem_drm_gem_mmap	2015-10-19 11:00:44 +02:00
via	drm/irq: Use unsigned int pipe in public API	2015-10-06 12:57:47 +02:00
virtio	drm/virtio: Use new drm_fb_helper functions	2015-08-06 14:13:07 +02:00
vmwgfx	drm/<drivers>: Drop DRM_UNLOCKED from modeset drivers	2015-10-16 15:50:54 +02:00
ati_pcigart.c
drm_agpsupport.c	drm: Remove __OS_HAS_AGP	2015-09-30 10:44:48 +02:00
drm_atomic_helper.c	Linux 4.3-rc2	2015-09-24 17:18:41 +02:00
drm_atomic.c	drm: drm_atomic_crtc_get_property should be static	2015-09-24 20:14:26 +02:00
drm_auth.c
drm_bridge.c
drm_bufs.c	drm: Remove __OS_HAS_AGP	2015-09-30 10:44:48 +02:00
drm_cache.c
drm_context.c	drm: Convert drm_legacy_ctxbitmap_init to void return type	2015-07-02 17:00:48 +02:00
drm_crtc_helper.c	drm: Make the connector dpms callback return a value, v2.	2015-07-27 16:23:28 +02:00
drm_crtc_internal.h
drm_crtc.c	drm: Fix return value of drm_framebuffer_init()	2015-10-19 11:00:44 +02:00
drm_debugfs.c
drm_dma.c
drm_dp_helper.c	Linux 4.3-rc2	2015-09-24 17:18:41 +02:00
drm_dp_mst_topology.c	Linux 4.2-rc8	2015-08-24 16:36:42 +10:00
drm_drv.c	drm: misc cleanup	2015-10-16 15:50:57 +02:00
drm_edid_load.c	drm: Constify generic_edid_names[]	2015-09-08 13:45:52 +02:00
drm_edid.c	drm: Make drm_av_sync_delay() 'mode' argument const	2015-09-09 14:53:54 +02:00
drm_encoder_slave.c
drm_fb_cma_helper.c	drm/fb_cma_helper: Use new drm_fb_helper functions	2015-08-06 14:13:00 +02:00
drm_fb_helper.c	drm/fbdev: Update legacy plane->fb refcounting for atomic restore	2015-09-24 20:14:20 +02:00
drm_flip_work.c
drm_fops.c
drm_gem_cma_helper.c	drm/gem: Drop struct_mutex requirement from drm_gem_mmap_obj	2015-10-16 15:51:00 +02:00
drm_gem.c	drm/gem: Use kref_get_unless_zero for the weak mmap references	2015-10-19 11:00:44 +02:00
drm_global.c
drm_hashtab.c
drm_info.c
drm_internal.h	drm: move drm_class into drm_sysfs.c	2015-09-09 15:05:17 +02:00
drm_ioc32.c	drm: Remove __OS_HAS_AGP	2015-09-30 10:44:48 +02:00
drm_ioctl.c	drm: Enforce unlocked ioctl operation for kms driver ioctls	2015-10-16 15:50:54 +02:00
drm_irq.c	drm: Add DRM_DEBUG_VBL()	2015-10-16 15:50:55 +02:00
drm_legacy.h	drm: Convert drm_legacy_ctxbitmap_init to void return type	2015-07-02 17:00:48 +02:00
drm_lock.c	drm: Reject DRI1 hw lock ioctl functions for kms drivers	2015-07-02 17:00:48 +02:00
drm_memory.c	drm: Remove __OS_HAS_AGP	2015-09-30 10:44:48 +02:00
drm_mipi_dsi.c
drm_mm.c	drm/mm: Do DRM_MM_CREATE_TOP adj_start calculation after color_adjust	2015-09-08 13:45:47 +02:00
drm_modes.c
drm_modeset_lock.c	drm/atomic: Make sure lock is held in trylock contexts.	2015-09-08 13:45:53 +02:00
drm_of.c	drm: Add modeset object iterators	2015-07-22 16:25:45 +02:00
drm_panel.c
drm_pci.c	drm/doc: Update docs about device instance setup	2015-09-30 10:06:06 +02:00
drm_plane_helper.c	drm/atomic: Make prepare_fb/cleanup_fb only take state, v3.	2015-09-08 13:45:54 +02:00
drm_platform.c	drm/doc: Update docs about device instance setup	2015-09-30 10:06:06 +02:00
drm_prime.c
drm_probe_helper.c	drm/probe-helper: Grab mode_config.mutex in poll_init/enable	2015-07-22 16:25:45 +02:00
drm_rect.c	drm: Use DRM_ROTATE_MASK and DRM_REFLECT_MASK	2015-10-05 15:32:51 +02:00
drm_scatter.c
drm_sysfs.c	drm: move drm_class into drm_sysfs.c	2015-09-09 15:05:17 +02:00
drm_trace_points.c
drm_trace.h
drm_vm.c	drm: Remove __OS_HAS_AGP	2015-09-30 10:44:48 +02:00
drm_vma_manager.c	drm/gem: Use kref_get_unless_zero for the weak mmap references	2015-10-19 11:00:44 +02:00
Kconfig	Merge branch 'drm-next-fsl-dcu' of https://github.com/Jianwei-Wang/linux-drm-fsl-dcu into drm-next	2015-08-20 14:11:17 +10:00
Makefile	drm: Hack around CONFIG_AGP=m build failures	2015-10-01 08:44:24 +02:00