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由 Tvrtko Ursulin 提交于
Until now code was calling hweight32 to figure out the number from device_info->ring_mask at runtime. Instead we can cache it at engine init time and use directly. Signed-off-by: NTvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by: NDave Gordon <david.s.gordon@intel.com> Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk> Link: http://patchwork.freedesktop.org/patch/msgid/1470842530-35854-1-git-send-email-tvrtko.ursulin@linux.intel.com
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