drm/i915: Optimize DIV_ROUND_CLOSEST call

DIV_ROUND_CLOSEST is faster if the compiler knows it will only be
dealing with unsigned dividends. This optimization rips 32 bytes of
binary code on x86_64.

Signed-off-by: Jean Delvare <[email protected]>
Cc: Guenter Roeck <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: David Airlie <[email protected]>
Signed-off-by: Daniel Vetter <[email protected]>

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 0cbc0e6402b4ff49e2b843e0f74b871d8a1ecf69..0edb549d14343df0c83b6d215509faeec87d1fa3 100644 (file)
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -2552,7 +2552,8 @@ static void gen6_update_ring_freq(struct drm_device *dev)
 {
        struct drm_i915_private *dev_priv = dev->dev_private;
        int min_freq = 15;
-       int gpu_freq, ia_freq, max_ia_freq;
+       int gpu_freq;
+       unsigned int ia_freq, max_ia_freq;
        int scaling_factor = 180;
 
        WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));