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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2016-04-13 19:35:12 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2016-04-14 12:45:40 +0300 |
| commit | 349f2ccff94e835210b253ec9bef1d97d6afb312 (patch) | |
| tree | 921730c0c587c88d0cf6af953f90c42143fcec9e /include | |
| parent | a687a43a48f0f91ba37dce5a14b467258ed6f035 (diff) | |
| download | linux-349f2ccff94e835210b253ec9bef1d97d6afb312.tar.xz | |
drm/i915: Move the mb() following release-mmap into release-mmap
As paranoia, we want to ensure that the CPU's PTEs have been revoked for
the object before we return from i915_gem_release_mmap(). This allows us
to rely on there being no outstanding memory accesses from userspace
and guarantees serialisation of the code against concurrent access just
by calling i915_gem_release_mmap().
v2: Reduce the mb() into a wmb() following the revoke.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: "Goel, Akash" <akash.goel@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1460565315-7748-13-git-send-email-chris@chris-wilson.co.uk
Diffstat (limited to 'include')
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