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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 <khali@linux-fr.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: David Airlie <airlied@linux.ie>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Jean Delvare 2012-11-12 14:18:02 +01:00 committed by Daniel Vetter
parent bf6f036848
commit e3fef09dda
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/i915/intel_pm.c
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@ -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));