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| author | Marcin Slusarz <marcin.slusarz@gmail.com> | 2008-10-16 07:03:50 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-10-16 20:21:45 +0200 |
| commit | 5ab4840968cd094586f65fce978e35c66d25ac78 (patch) | |
| tree | 97505fbfc59bb53771602dc7a733afd884886b58 /drivers/video | |
| parent | vgacon: optimize scrolling (diff) | |
| download | linux-5ab4840968cd094586f65fce978e35c66d25ac78.tar.xz linux-5ab4840968cd094586f65fce978e35c66d25ac78.zip | |
vgacon: vgacon_scrolldelta simplification
There's no point in checking diff == c->vc_rows, because it can be true
only when count == 0, but we already checked that. Additionally move
variables used only in one block to this block.
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Cc: Antonino Daplas <adaplas@gmail.com>
Acked-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/console/vgacon.c | 20 |
1 files changed, 8 insertions, 12 deletions
diff --git a/drivers/video/console/vgacon.c b/drivers/video/console/vgacon.c index 3556268fe0a0..448d209a0bf2 100644 --- a/drivers/video/console/vgacon.c +++ b/drivers/video/console/vgacon.c @@ -239,8 +239,7 @@ static void vgacon_restore_screen(struct vc_data *c) static int vgacon_scrolldelta(struct vc_data *c, int lines) { - int start, end, count, soff, diff; - void *d, *s; + int start, end, count, soff; if (!lines) { c->vc_visible_origin = c->vc_origin; @@ -287,13 +286,13 @@ static int vgacon_scrolldelta(struct vc_data *c, int lines) if (count > c->vc_rows) count = c->vc_rows; - diff = c->vc_rows - count; - - d = (void *) c->vc_origin; - s = (void *) c->vc_screenbuf; - if (count) { int copysize; + + int diff = c->vc_rows - count; + void *d = (void *) c->vc_origin; + void *s = (void *) c->vc_screenbuf; + count *= c->vc_size_row; /* how much memory to end of buffer left? */ copysize = min(count, vgacon_scrollback_size - soff); @@ -305,14 +304,11 @@ static int vgacon_scrolldelta(struct vc_data *c, int lines) scr_memcpyw(d, vgacon_scrollback, count); d += count; } - } - if (diff == c->vc_rows) { - vgacon_cursor(c, CM_MOVE); - } else { if (diff) scr_memcpyw(d, s, diff * c->vc_size_row); - } + } else + vgacon_cursor(c, CM_MOVE); return 1; } |