The patch titled
pm2fb: replace busy waiting with cpu_relax
has been removed from the -mm tree. Its filename was
pm2fb-replace-busy-waiting-with-cpu_relax.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: pm2fb: replace busy waiting with cpu_relax
From: Krzysztof Helt <krzysztof.h1@xxxxx>
This patch replaces busy waiting with the cpu_relax() call. This makes
scrolling faster.
Signed-off-by: Krzysztof Helt <krzysztof.h1@xxxxx>
Signed-off-by: Antonino Daplas <adaplas@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/video/pm2fb.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff -puN drivers/video/pm2fb.c~pm2fb-replace-busy-waiting-with-cpu_relax drivers/video/pm2fb.c
--- a/drivers/video/pm2fb.c~pm2fb-replace-busy-waiting-with-cpu_relax
+++ a/drivers/video/pm2fb.c
@@ -193,8 +193,8 @@ static inline void pm2v_RDAC_WR(struct p
#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
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 *in
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;
_
Patches currently in -mm which might be from krzysztof.h1@xxxxx are
origin.patch
git-alsa.patch
cyber2000fb-checkpatch-fixes.patch
-
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