Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=6416ad7365833657fe0ca561261b324edc5aba42
Commit: 6416ad7365833657fe0ca561261b324edc5aba42
Parent: f67fd7c10f2eb16e6c70fd99e97a148e19ac5a55
Author: Krzysztof Helt <[EMAIL PROTECTED]>
AuthorDate: Tue Oct 16 01:29:27 2007 -0700
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Tue Oct 16 09:43:19 2007 -0700
pm2fb: replace busy waiting with cpu_relax
This patch replaces busy waiting with the cpu_relax() call. This makes
scrolling faster.
Signed-off-by: Krzysztof Helt <[EMAIL PROTECTED]>
Signed-off-by: Antonino Daplas <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
drivers/video/pm2fb.c | 9 ++++-----
1 files changed, 4 insertions(+), 5 deletions(-)
diff --git a/drivers/video/pm2fb.c b/drivers/video/pm2fb.c
index 9db1f2e..5591dfb 100644
--- a/drivers/video/pm2fb.c
+++ b/drivers/video/pm2fb.c
@@ -193,8 +193,8 @@ static inline void pm2v_RDAC_WR(struct pm2fb_par *p, s32
idx, u32 v)
#else
static inline void WAIT_FIFO(struct pm2fb_par *p, u32 a)
{
- while (pm2_RD(p, PM2R_IN_FIFO_SPACE) < a);
- mb();
+ while (pm2_RD(p, PM2R_IN_FIFO_SPACE) < a)
+ cpu_relax();
}
#endif
@@ -328,7 +328,7 @@ static void reset_card(struct pm2fb_par *p)
pm2_WR(p, PM2R_RESET_STATUS, 0);
mb();
while (pm2_RD(p, PM2R_RESET_STATUS) & PM2F_BEING_RESET)
- ;
+ cpu_relax();
mb();
#ifdef CONFIG_FB_PM2_FIFO_DISCONNECT
DPRINTK("FIFO disconnect enabled\n");
@@ -1041,8 +1041,7 @@ static int pm2fb_sync(struct fb_info *info)
mb();
do {
while (pm2_RD(par, PM2R_OUT_FIFO_WORDS) == 0)
- udelay(10);
- rmb();
+ cpu_relax();
} while (pm2_RD(par, PM2R_OUT_FIFO) != PM2TAG(PM2R_SYNC));
return 0;
-
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