[PATCH v2] ttyprintk: optimize tpk_close flush code

[Junyong Sun]

tpk_printk(NULL,0) do nothing but call tpk_flush to
flush buffer, so why don't use tpk_flush diretcly?
this is a small optimization.

Signed-off-by: Junyong Sun <sunjunyong@xxxxxxxxxx>
---
changes in v2:
- rm the flush comment as tpk_flush makes it obvious.
---
---
 drivers/char/ttyprintk.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/char/ttyprintk.c b/drivers/char/ttyprintk.c
index 6a0059e..1f82742 100644
--- a/drivers/char/ttyprintk.c
+++ b/drivers/char/ttyprintk.c
@@ -103,8 +103,7 @@ static void tpk_close(struct tty_struct *tty, struct file *filp)
 	unsigned long flags;
 
 	spin_lock_irqsave(&tpkp->spinlock, flags);
-	/* flush tpk_printk buffer */
-	tpk_printk(NULL, 0);
+	tpk_flush();
 	spin_unlock_irqrestore(&tpkp->spinlock, flags);
 
 	tty_port_close(&tpkp->port, tty, filp);
-- 
2.7.4