From: Thomas Schlichter the patch "serial-02-fixups.patch" introduced following compile error: CC [M] drivers/char/sx.o drivers/char/sx.c: In function `sx_tiocmset': drivers/char/sx.c:1761: error: `dtr' undeclared (first use in this function) drivers/char/sx.c:1761: error: (Each undeclared identifier is reported only= =20 once drivers/char/sx.c:1761: error: for each function it appears in.) drivers/char/sx.c:1756: Warnung: unused variable `cts' --- drivers/char/sx.c | 2 +- 1 files changed, 1 insertion(+), 1 deletion(-) diff -puN drivers/char/sx.c~serial-02-fixes-fix-2 drivers/char/sx.c --- 25/drivers/char/sx.c~serial-02-fixes-fix-2 2004-01-14 18:15:25.000000000 -0800 +++ 25-akpm/drivers/char/sx.c 2004-01-14 18:15:25.000000000 -0800 @@ -1753,7 +1753,7 @@ static int sx_tiocmset(struct tty_struct unsigned int set, unsigned int clear) { struct sx_port *port = tty->driver_data; - int rts = -1, cts = -1; + int rts = -1, dtr = -1; if (set & TIOCM_RTS) rts = 1; _