From: "Antonino A. Daplas" <adaplas@gmail.com>
To: Andrew Morton <akpm@osdl.org>
Cc: Krzysztof Helt <krzysztof.h1@wp.pl>,
Linux Fbdev development list
<linux-fbdev-devel@lists.sourceforge.net>
Subject: [PATCH 09/12] tdfxfb: replace busy waiting with cpu_relax
Date: Sat, 15 Sep 2007 08:06:01 +0800 [thread overview]
Message-ID: <46EB21E9.6030100@gmail.com> (raw)
From: Krzysztof Helt <krzysztof.h1@wp.pl>
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>
---
drivers/video/tdfxfb.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/drivers/video/tdfxfb.c b/drivers/video/tdfxfb.c
index c7ec5f3..faac9b4 100644
--- a/drivers/video/tdfxfb.c
+++ b/drivers/video/tdfxfb.c
@@ -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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