[PATCH] tdfxfb: replace busy waiting with cpu_relax

From: Krzysztof Helt <redacted>

This patch replaces busy waiting with cpu_relax() call.
This makes scrolling faster.

Signed-off-by: Krzysztof Helt <redacted>
---
The scrolling is 5% faster on Voodoo3 2000 and 333MHz CPU.

The patch is done against 2.6.23-rc4-mm1 tree.

--- linux-2.6.22.old/drivers/video/tdfxfb.c	2007-09-05 21:03:56.000000000 +0200
+++ linux-2.6.22/drivers/video/tdfxfb.c	2007-09-05 21:40:53.000000000 +0200

@@ -273,7 +273,8 @@ static inline void banshee_make_room(str
 {
 	/* Note: The Voodoo3's onboard FIFO has 32 slots. This loop
 	 * won't quit if you ask for more. */
- 	while ((tdfx_inl(par, STATUS) & 0x1f) < size - 1) ;
+	while ((tdfx_inl(par, STATUS) & 0x1f) < size - 1)
+		cpu_relax();
 }
  
 static int banshee_wait_idle(struct fb_info *info)

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