vt: move rescan_last_byte label earlier

This removes duplicated initialization of variables (after reordering
'c' initialization).

It will also allow for eliminating whole translation into a separate
function in the next patch.

Note that vc_state, vc_utf etc. are checked with every rescan now. But
they are immutable for non-control characters where rescan might be
only necessary.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20200615074910.19267-15-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index bf171bb..93ad7e0 100644 (file)
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -2717,10 +2717,11 @@ static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int co
 
        while (!tty->stopped && count) {
                int orig = *buf;
-               c = orig;
                buf++;
                n++;
                count--;
+rescan_last_byte:
+               c = orig;
                rescan = false;
                inverse = false;
                width = 1;
@@ -2729,7 +2730,6 @@ static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int co
                if (vc->vc_state != ESnormal) {
                        tc = c;
                } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
-rescan_last_byte:
                        tc = c = vc_translate_unicode(vc, c, &rescan);
                        if (tc == -1)
                                continue;
@@ -2834,13 +2834,9 @@ rescan_last_byte:
                        if (inverse)
                                con_flush(vc, draw_from, draw_to, &draw_x);
 
-                       if (rescan) {
-                               rescan = false;
-                               inverse = false;
-                               width = 1;
-                               c = orig;
+                       if (rescan)
                                goto rescan_last_byte;
-                       }
+
                        continue;
                }
                con_flush(vc, draw_from, draw_to, &draw_x);