[PATCH] fbdev: Shift pixel value before entering loop in cfbimageblit

In slow imageblit, the pixel value is shifted by a certain amount (dependent
on the bpp and endianness) for each iteration.  This is inefficient.  Better
do the shifting once before going into the loop.

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/video/cfbimgblt.c

@@ -162,6 +162,8 @@ static inline void slow_imageblit(const struct fb_image *image, struct fb_info *
 	u32 i, j, l;
 
 	dst2 = (u32 __iomem *) dst1;
+	fgcolor <<= LEFT_POS(bpp);
+	bgcolor <<= LEFT_POS(bpp);
 
 	for (i = image->height; i--; ) {
 		shift = val = 0;
@@ -180,7 +182,6 @@ static inline void slow_imageblit(const struct fb_image *image, struct fb_info *
 		while (j--) {
 			l--;
 			color = (*s & 1 << (BIT_NR(l))) ? fgcolor : bgcolor;
-			color <<= LEFT_POS(bpp);
 			val |= SHIFT_HIGH(color, shift);
 
 			/* Did the bitshift spill bits to the next long? */