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| author | Jiri Slaby <jslaby@suse.cz> | 2020-06-15 09:48:40 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-06-24 17:08:31 +0200 |
| commit | de53ce0427cd20886b0d53555dc576702cbb1ff8 (patch) | |
| tree | 0c127a71647417655bc825e8b9d27a67c32162c4 /drivers/tty/vt | |
| parent | vt: remove 25 years stale comment (diff) | |
| download | linux-de53ce0427cd20886b0d53555dc576702cbb1ff8.tar.xz linux-de53ce0427cd20886b0d53555dc576702cbb1ff8.zip | |
vt: use tty_insert_flip_string in respond_string
Pass the length of a string to respond_string and use
tty_insert_flip_string instead of a loop with tty_insert_flip_char. This
simplifies the processing on the tty side.
The added strlens are optimized during constant folding and propagation
and the result are proper constants in assembly.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20200615074910.19267-8-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/vt')
| -rw-r--r-- | drivers/tty/vt/vt.c | 27 |
1 files changed, 15 insertions, 12 deletions
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 3adb7f409524..49c9d1e4067c 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -1809,40 +1809,43 @@ static void csi_m(struct vc_data *vc) update_attr(vc); } -static void respond_string(const char *p, struct tty_port *port) +static void respond_string(const char *p, size_t len, struct tty_port *port) { - while (*p) { - tty_insert_flip_char(port, *p, 0); - p++; - } + tty_insert_flip_string(port, p, len); tty_schedule_flip(port); } static void cursor_report(struct vc_data *vc, struct tty_struct *tty) { char buf[40]; + int len; - sprintf(buf, "\033[%d;%dR", vc->state.y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->state.x + 1); - respond_string(buf, tty->port); + len = sprintf(buf, "\033[%d;%dR", vc->state.y + + (vc->vc_decom ? vc->vc_top + 1 : 1), + vc->state.x + 1); + respond_string(buf, len, tty->port); } static inline void status_report(struct tty_struct *tty) { - respond_string("\033[0n", tty->port); /* Terminal ok */ + static const char teminal_ok[] = "\033[0n"; + + respond_string(teminal_ok, strlen(teminal_ok), tty->port); } static inline void respond_ID(struct tty_struct *tty) { - respond_string(VT102ID, tty->port); + respond_string(VT102ID, strlen(VT102ID), tty->port); } void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry) { char buf[8]; + int len; - sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx), - (char)('!' + mry)); - respond_string(buf, tty->port); + len = sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), + (char)('!' + mrx), (char)('!' + mry)); + respond_string(buf, len, tty->port); } /* invoked via ioctl(TIOCLINUX) and through set_selection_user */ |