The patch titled
pm3fb: replace busy waiting with cpu_relax
has been removed from the -mm tree. Its filename was
pm3fb-replace-busy-waiting-with-cpu_relax.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: pm3fb: 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/pm3fb.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff -puN drivers/video/pm3fb.c~pm3fb-replace-busy-waiting-with-cpu_relax drivers/video/pm3fb.c
--- a/drivers/video/pm3fb.c~pm3fb-replace-busy-waiting-with-cpu_relax
+++ a/drivers/video/pm3fb.c
@@ -110,7 +110,8 @@ static inline void PM3_WRITE_REG(struct
static inline void PM3_WAIT(struct pm3_par *par, u32 n)
{
- while (PM3_READ_REG(par, PM3InFIFOSpace) < n);
+ while (PM3_READ_REG(par, PM3InFIFOSpace) < n)
+ cpu_relax();
}
static inline void PM3_WRITE_DAC_REG(struct pm3_par *par, unsigned r, u8 v)
@@ -209,8 +210,8 @@ static int pm3fb_sync(struct fb_info *in
PM3_WRITE_REG(par, PM3Sync, 0);
mb();
do {
- while ((PM3_READ_REG(par, PM3OutFIFOWords)) == 0);
- rmb();
+ while ((PM3_READ_REG(par, PM3OutFIFOWords)) == 0)
+ cpu_relax();
} while ((PM3_READ_REG(par, PM3OutputFifo)) != PM3Sync_Tag);
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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