drm/msm/gem: Move locking in shrinker path
Move grabbing the bo lock into shrinker, with a msm_gem_trylock() to skip over bo's that are already locked. This gets rid of the nested lock classes. Signed-off-by: NRob Clark <robdclark@chromium.org> Reviewed-by: NKristian H. Kristensen <hoegsberg@google.com> Signed-off-by: NRob Clark <robdclark@chromium.org>
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