drm/i915: optimize DIV_ROUND_CLOSEST() call

DIV_ROUND_CLOSEST is faster if the compiler knows it will only be dealing
with unsigned dividends.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: David Airlie <airlied@linux.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index d69f8f49beb5bf2a67f87f9b708a5a99af1616ff..dd246b16885b7d8e24883e1735c96b4fbc93e3e6 100644 (file)
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -2547,7 +2547,8 @@ 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->struct_mutex));