um: line, remove put_char

um's put_char only calls write. And the tty layer/disciplines do the
same if put_char is NULL.

So we can safely remove this put_char wrapper.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Link: https://lore.kernel.org/r/20200615074856.18949-1-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index 4f2a4ac..14ad9f4 100644 (file)
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -184,11 +184,6 @@ void line_flush_chars(struct tty_struct *tty)
        line_flush_buffer(tty);
 }
 
-int line_put_char(struct tty_struct *tty, unsigned char ch)
-{
-       return line_write(tty, &ch, sizeof(ch));
-}
-
 int line_write(struct tty_struct *tty, const unsigned char *buf, int len)
 {
        struct line *line = tty->driver_data;

diff --git a/arch/um/drivers/line.h b/arch/um/drivers/line.h
index a151ff5..01d21e7 100644 (file)
--- a/arch/um/drivers/line.h
+++ b/arch/um/drivers/line.h
@@ -66,7 +66,6 @@ extern int line_setup(char **conf, unsigned nlines, char **def,
                      char *init, char *name);
 extern int line_write(struct tty_struct *tty, const unsigned char *buf,
                      int len);
-extern int line_put_char(struct tty_struct *tty, unsigned char ch);
 extern void line_set_termios(struct tty_struct *tty, struct ktermios * old);
 extern int line_chars_in_buffer(struct tty_struct *tty);
 extern void line_flush_buffer(struct tty_struct *tty);

diff --git a/arch/um/drivers/ssl.c b/arch/um/drivers/ssl.c
index 26c5716..6476b28 100644 (file)
--- a/arch/um/drivers/ssl.c
+++ b/arch/um/drivers/ssl.c
@@ -95,7 +95,6 @@ static const struct tty_operations ssl_ops = {
        .open                   = line_open,
        .close                  = line_close,
        .write                  = line_write,
-       .put_char               = line_put_char,
        .write_room             = line_write_room,
        .chars_in_buffer        = line_chars_in_buffer,
        .flush_buffer           = line_flush_buffer,

diff --git a/arch/um/drivers/stdio_console.c b/arch/um/drivers/stdio_console.c
index 0021d7f..37b1279 100644 (file)
--- a/arch/um/drivers/stdio_console.c
+++ b/arch/um/drivers/stdio_console.c
@@ -102,7 +102,6 @@ static const struct tty_operations console_ops = {
        .install                = con_install,
        .close                  = line_close,
        .write                  = line_write,
-       .put_char               = line_put_char,
        .write_room             = line_write_room,
        .chars_in_buffer        = line_chars_in_buffer,
        .flush_buffer           = line_flush_buffer,