Merge tag 'drm-misc-next-2019-10-31' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

drm-misc-next for 5.5:

UAPI Changes:
-dma-buf: Introduce and revert dma-buf heap (Andrew/John/Sean)

Cross-subsystem Changes:
- None

Core Changes:
-dma-buf: add dynamic mapping to allow exporters to choose dma_resv lock
	  state on mmap/munmap (Christian)
-vram: add prepare/cleanup fb helpers to vram helpers (Thomas)
-ttm: always keep bo's on the lru + ttm cleanups (Christian)
-sched: allow a free_job routine to sleep (Steven)
-fb_helper: remove unused drm_fb_helper_defio_init() (Thomas)

Driver Changes:
-bochs/hibmc/vboxvideo: Use new vram helpers for prepare/cleanup fb (Thomas)
-amdgpu: Implement dma-buf import/export without drm helpers (Christian)
-panfrost: Simplify devfreq integration in driver (Steven)

Cc: Christian König <christian.koenig@amd.com>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Steven Price <steven.price@arm.com>
Cc: Andrew F. Davis <afd@ti.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Sean Paul <sean@poorly.run>
Link: https://patchwork.freedesktop.org/patch/msgid/20191031193015.GA243509@art_vandelay

Documentation/gpu/todo.rst

@@ -206,10 +206,10 @@ Generic fbdev defio support
 ---------------------------
 
 The defio support code in the fbdev core has some very specific requirements,
-which means drivers need to have a special framebuffer for fbdev. Which prevents
-us from using the generic fbdev emulation code everywhere. The main issue is
-that it uses some fields in struct page itself, which breaks shmem gem objects
-(and other things).
+which means drivers need to have a special framebuffer for fbdev. The main
+issue is that it uses some fields in struct page itself, which breaks shmem
+gem objects (and other things). To support defio, affected drivers require
+the use of a shadow buffer, which may add CPU and memory overhead.
 
 Possible solution would be to write our own defio mmap code in the drm fbdev
 emulation. It would need to fully wrap the existing mmap ops, forwarding