[PATCH] fbdev: Replace memcpy with for-loop when preparing bitmap

Do not use memcpy in fb_pad_aligned_buffer.  It is suboptimal because only
a few bytes are moved at a time.  Replace with a for-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>

diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
index 40784a9..d2e19f6 100644 (file)
--- a/drivers/video/fbmem.c
+++ b/drivers/video/fbmem.c
@@ -80,10 +80,12 @@ EXPORT_SYMBOL(fb_get_color_depth);
  */
 void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height)
 {
-       int i;
+       int i, j;
 
        for (i = height; i--; ) {
-               memcpy(dst, src, s_pitch);
+               /* s_pitch is a few bytes at the most, memcpy is suboptimal */
+               for (j = 0; j < s_pitch; j++)
+                       dst[j] = src[j];
                src += s_pitch;
                dst += d_pitch;
        }