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 --- Already sent on: 2012-09-03.

Daniel, I think we can safely assume ia_freq can't be negative?

drivers/gpu/drm/i915/intel_pm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

--- linux-3.7-rc5.orig/drivers/gpu/drm/i915/intel_pm.c 2012-11-12 09:30:56.796836818 +0100 +++ linux-3.7-rc5/drivers/gpu/drm/i915/intel_pm.c 2012-11-12 10:49:38.241676096 +0100 @@ -2547,7 +2547,8 @@ static void gen6_update_ring_freq(struct { 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));