drm/i915: Remove the dedicated hangcheck workqueue
The queue only ever contains at most one item and has no special flags. It is just a very simple wrapper around the system-wq - a complication with no benefits. v2: Use the system_long_wq as we may wish to capture the error state after detecting the hang - which may take a bit of time. Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk> Reviewed-by: NTvrtko Ursulin <tvrtko.ursulin@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1467390209-3576-3-git-send-email-chris@chris-wilson.co.uk
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