diff options
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/vt/vt.c | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 3cb6504b41d3..804cc3151b13 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -4287,7 +4287,7 @@ void vc_scrolldelta_helper(struct vc_data *c, int lines, ptrdiff_t vorigin = (void *)c->vc_visible_origin - base; ptrdiff_t origin = (void *)c->vc_origin - base; int margin = c->vc_size_row * 4; - int ul, we, p, st; + int from, wrap, from_off, avail; /* Turn scrollback off */ if (!lines) { @@ -4297,25 +4297,25 @@ void vc_scrolldelta_helper(struct vc_data *c, int lines, /* Do we have already enough to allow jumping from 0 to the end? */ if (rolled_over > scr_end + margin) { - ul = scr_end; - we = rolled_over + c->vc_size_row; + from = scr_end; + wrap = rolled_over + c->vc_size_row; } else { - ul = 0; - we = size; + from = 0; + wrap = size; } - p = (vorigin - ul + we) % we + lines * c->vc_size_row; - st = (origin - ul + we) % we; + from_off = (vorigin - from + wrap) % wrap + lines * c->vc_size_row; + avail = (origin - from + wrap) % wrap; /* Only a little piece would be left? Show all incl. the piece! */ - if (st < 2 * margin) + if (avail < 2 * margin) margin = 0; - if (p < margin) - p = 0; - if (p > st - margin) - p = st; + if (from_off < margin) + from_off = 0; + if (from_off > avail - margin) + from_off = avail; - c->vc_visible_origin = ubase + (p + ul) % we; + c->vc_visible_origin = ubase + (from + from_off) % wrap; } EXPORT_SYMBOL_GPL(vc_scrolldelta_helper); |