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| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2018-03-27 10:23:54 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2018-03-28 17:07:36 +0200 |
| commit | ae358dacd217370cc362f1674712c4e9246ace8d (patch) | |
| tree | 049bc8fbf62f7ef091087ee0e5d9d017ebbfc116 /include/drm/drm_simple_kms_helper.h | |
| parent | drm/rockchip: fixup comment for gem_free_object_unlocked (diff) | |
| download | linux-ae358dacd217370cc362f1674712c4e9246ace8d.tar.xz linux-ae358dacd217370cc362f1674712c4e9246ace8d.zip | |
drm/udl: Get rid of dev->struct_mutex usage
It's only used to protect our page list, and only when we know we have
a full reference. This means none of these code paths can ever race
with the final unref, and hence we do not need dev->struct_mutex
serialization and can simply switch to our own locking.
For more context the only magic the locked gem_free_object provides is
that it prevents concurrent final unref (and destruction) of gem
objects while anyone is holding dev->struct_mutex. This was used by
i915 (and other drivers) to implement eviction handling with less
headaches.
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: Dave Airlie <airlied@redhat.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180327082356.24516-3-daniel.vetter@ffwll.ch
Diffstat (limited to 'include/drm/drm_simple_kms_helper.h')
0 files changed, 0 insertions, 0 deletions