This patch fixed this error:

CC arch/um/drivers/line.o
/home/wangcong/Projects/linux-2.6/arch/um/drivers/line.c: In
function ‘line_write_interrupt’:
/home/wangcong/Projects/linux-2.6/arch/um/drivers/line.c:366: error:
‘struct tty_ldisc’ has no member named ‘write_wakeup’
/home/wangcong/Projects/linux-2.6/arch/um/drivers/line.c:367: error:
‘struct tty_ldisc’ has no member named ‘write_wakeup’


Signed-off-by: WANG Cong
Cc: jdike@addtoit.com
Acked-by: Alan Cox

---
diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index 5047490..d741f35 100644
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -362,19 +362,7 @@ static irqreturn_t line_write_interrupt(int irq, void *data)
if (tty == NULL)
return IRQ_NONE;

- if (test_bit(TTY_DO_WRITE_WAKEUP, &tty->flags) &&
- (tty->ldisc.write_wakeup != NULL))
- (tty->ldisc.write_wakeup)(tty);
-
- /*
- * BLOCKING mode
- * In blocking mode, everything sleeps on tty->write_wait.
- * Sleeping in the console driver would break non-blocking
- * writes.
- */
-
- if (waitqueue_active(&tty->write_wait))
- wake_up_interruptible(&tty->write_wait);
+ tty_wakeup(tty);
return IRQ_HANDLED;
}

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