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| author |   Antonino A. Daplas <adaplas@gmail.com> | 2005-07-29 14:03:33 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2005-07-29 15:01:14 -0700 |
| commit | e4c5c82024f5f292c0069cf40422b8f3bf5e684e (patch) | |
| tree | 09a6633c9a9d9ec388f90f1b12f2ea2553130ac3 /drivers/video | |
| parent | [PATCH] x86: avoid wasting IRQs patch update (diff) | |
| download | linux-dev-e4c5c82024f5f292c0069cf40422b8f3bf5e684e.tar.xz linux-dev-e4c5c82024f5f292c0069cf40422b8f3bf5e684e.zip | |
[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>
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/fbmem.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c index 40784a944d05..d2e19f6dd72c 100644 --- 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; } |