From f67fd7c10f2eb16e6c70fd99e97a148e19ac5a55 Mon Sep 17 00:00:00 2001
From: Krzysztof Helt <krzysztof.h1@wp.pl>
Date: Tue, 16 Oct 2007 01:29:26 -0700
Subject: [PATCH] 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>
---
drivers/video/tdfxfb.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/video/tdfxfb.c b/drivers/video/tdfxfb.c
index c7ec5f382608e..faac9b469ea9a 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)
--
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