From: Krzysztof Helt <krzysztof.h1@wp.pl>
Date: Tue, 16 Oct 2007 08:29:26 +0000 (-0700)
Subject: tdfxfb: replace busy waiting with cpu_relax
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f67fd7c10f2eb16e6c70fd99e97a148e19ac5a55;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git

tdfxfb: replace busy waiting with cpu_relax

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

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/drivers/video/tdfxfb.c b/drivers/video/tdfxfb.c
index c7ec5f382608..faac9b469ea9 100644
--- a/drivers/video/tdfxfb.c
+++ b/drivers/video/tdfxfb.c
@@ -273,7 +273,8 @@ static inline void banshee_make_room(struct tdfx_par *par, int size)
 {
 	/* 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)