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 - To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html