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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2017-05-04 14:08:44 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2017-05-04 15:40:38 +0100 |
| commit | 605d5b3297687cce9d3c4298c699188e61486a4c (patch) | |
| tree | 843b54037b92d5477ae26f5c3d68b44c68a0aea1 /drivers/gpu/drm/i915/intel_lspcon.c | |
| 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
Diffstat (limited to 'drivers/gpu/drm/i915/intel_lspcon.c')
0 files changed, 0 insertions, 0 deletions