| commit | 605d5b3297687cce9d3c4298c699188e61486a4c | [log] [tgz] |
|---|---|---|
| author | Chris Wilson <chris@chris-wilson.co.uk> | Thu May 04 14:08:44 2017 +0100 |
| committer | Chris Wilson <chris@chris-wilson.co.uk> | Thu May 04 15:40:38 2017 +0100 |
| tree | 843b54037b92d5477ae26f5c3d68b44c68a0aea1 | |
| parent | 266a240bf0abf1e00e72e571f3724ec753a35f19 [diff] |
drm/i915: Avoid the branch in computing intel_ring_space() Exploit the power-of-two ring size to compute the space across the wraparound using a mask rather than a if. Convert to unsigned integers so the operation is well defined. References: https://bugs.freedesktop.org/show_bug.cgi?id=99671 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Mika Kuoppala <mika.kuoppala@intel.com> Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170504130846.4807-1-chris@chris-wilson.co.uk