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    Subject[PATCH] vt: Do not clear UTF when resetting console
    Resetting the console, either by ANSI escape sequences or by the reset utility,
    will drop the console back to legacy (non-UTF-8) mode. Fix this by leaving the
    field vc_data.vc_utf untouched in reset_terminal(). In addition, a global
    variable (default_utf8) which defines system-wide UTF-8 setting is created.
    This variable can be adjusted via sysfs.

    This is based from patches by Jan Engelhardt and Paul LeoNerd Evans.

    Signed-off-by: Antonino Daplas <adaplas@gmail.com>
    ---

    drivers/char/vt.c | 4 +++-
    1 files changed, 3 insertions(+), 1 deletions(-)

    diff --git a/drivers/char/vt.c b/drivers/char/vt.c
    index 1bbb45b..fdd548f 100644
    --- a/drivers/char/vt.c
    +++ b/drivers/char/vt.c
    @@ -157,6 +157,8 @@ static void blank_screen_t(unsigned long
    static void set_palette(struct vc_data *vc);

    static int printable; /* Is console ready for printing? */
    +static int default_utf8;
    +module_param(default_utf8, int, S_IRUGO | S_IWUSR);

    /*
    * ignore_poke: don't unblank the screen when things are typed. This is
    @@ -1497,7 +1499,6 @@ static void reset_terminal(struct vc_dat
    vc->vc_charset = 0;
    vc->vc_need_wrap = 0;
    vc->vc_report_mouse = 0;
    - vc->vc_utf = 0;
    vc->vc_utf_count = 0;

    vc->vc_disp_ctrl = 0;
    @@ -2590,6 +2591,7 @@ static void vc_init(struct vc_data *vc,
    vc->vc_rows = rows;
    vc->vc_size_row = cols << 1;
    vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
    + vc->vc_utf = default_utf8;

    set_origin(vc);
    vc->vc_pos = vc->vc_origin;
    -
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