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[ Upstream commitd984457b31] Rather than relying on the big dev->struct_mutex hammer, introduce a more specific lock for protecting the bo lists. Signed-off-by: Rob Clark <robdclark@chromium.org> Reviewed-by: Jordan Crouse <jcrouse@codeaurora.org> Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com> Signed-off-by: Rob Clark <robdclark@chromium.org> Stable-dep-of:a30f9f65b5("drm/msm/a5xx: workaround early ring-buffer emptiness check") Signed-off-by: Sasha Levin <sashal@kernel.org>