The patch titled
pm2fb: replace busy waiting with cpu_relax
has been added to the -mm tree. Its filename is
pm2fb-replace-busy-waiting-with-cpu_relax.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
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
git-alsa.patch
git-hwmon.patch
pm3fb-copyarea-and-partial-imageblit-suppor.patch
skeletonfb-wrong-field-name-fix.patch
pm3fb-header-file-reduction.patch
pm3fb-imageblit-improved.patch
pm3fb-3-small-fixes.patch
pm3fb-improvements-and-cleanups.patch
pm3fb-mtrr-support-and-noaccel-option.patch
pm3fb-mtrr-support-and-noaccel-option-make-pm3fb_init-static-again.patch
pm2fb-mtrr-support-and-noaccel-option.patch
pm2fb-mtrr-support-and-noaccel-option-pm2fb-lowsyncs-section-mismatch-fix.patch
pm2fb-accelerated-imageblit.patch
pm2fb-source-code-improvements.patch
pm2fb-permedia-2v-initialization-fixes.patch
pm2fb-accelerated-24-bit-fillrect.patch
tridentfb-coding-style-improvement.patch
tdfxfb-coding-style-improvement.patch
tdfxfb-3-fixes.patch
tdfxfb-palette-fixes.patch
tdfxfb-code-improvements.patch
tdfxfb-hardware-cursor.patch
tdfxfb-mtrr-support.patch
tdfxfb-mtrr-support-fix.patch
tdfxfb-mtrr-support-fix-2.patch
pm2fb-checkpatch-fixes.patch
pm3fb-checkpatch-fixes.patch
pm2fb-permedia-2v-hardware-cursor-support.patch
pm3fb-hardware-cursor-support.patch
s3c2410fb-code-cleanup.patch
s3c2410fb-remove-fb_info-pointer-from-s3c2410fb_info.patch
s3c2410fb-multi-display-support.patch
s3c2410fb-add-margin-fields-to-s3c2410fb_display.patch
s3c2410fb-use-new-margin-fields.patch
s3c2410fb-remove-lcdcon3-register-from-s3c2410fb_display.patch
s3c2410fb-add-vertical-margins-fields-to-s3c2410fb_display.patch
s3c2410fb-use-vertical-margins-values.patch
s3c2410fb-add-pulse-length-fields-to-s3c2410fb_display.patch
s3c2410fb-remove-lcdcon2-and-lcdcon3-register-fields.patch
s3c2410fb-fix-missing-registers-offset.patch
fbdev-change-asm-uaccessh-to-linux-uaccessh.patch
s3c2410fb-source-code-improvements.patch
s3c2410fb-adds-pixclock-to-s3c2410fb_display.patch
s3c2410fb-removes-lcdcon1-register-value-from-s3c2410fb_display.patch
s3c2410fb-make-use-of-default_display-settings.patch
cirrusfb-checkpatchpl-cleanup.patch
cirrusfb-checkpatchpl-cleanup-ppc-fix.patch
cirrusfb-remove-typedefs.patch
cirrusfb-remove-fields-from-cirrusfb_info.patch
cirrusfb-code-improvements.patch
cirrusfb-code-improvement-2nd-part.patch
pm3fb-header-file-cleanup.patch
pm2fb-hardware-cursor-support-for-the-permedia2.patch
pm2fb-panning-and-hardware-cursor-fixes.patch
tdfxfb-replace-busy-waiting-with-cpu_relax.patch
pm2fb-replace-busy-waiting-with-cpu_relax.patch
pm3fb-replace-busy-waiting-with-cpu_relax.patch
tdfxfb-checkpatch-fixes.patch
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