a7y18lte-ubports/android_kernel_samsung_universal7885
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[PATCH] fbdev: Replace memcpy with for-loop when preparing bitmap

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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>
This commit is contained in:
Antonino A. Daplas 2005-07-29 14:03:33 -07:00 committed by Linus Torvalds
parent e1afc3f522
commit e4c5c82024
1 changed files with 4 additions and 2 deletions
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6
drivers/video/fbmem.c
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@ -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) 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--; ) { 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; src += s_pitch;
dst += d_pitch; dst += d_pitch;
} }