Merge branch 'x86/core' into cpus4096

1 files changed, 6 insertions, 6 deletions

diff --git a/drivers/char/hvc_console.c b/drivers/char/hvc_console.c
index 5a8a4c28c86..94e7e3c8c05 100644
--- a/drivers/char/hvc_console.c
+++ b/drivers/char/hvc_console.c
@@ -318,7 +318,6 @@ static int hvc_open(struct tty_struct *tty, struct file * filp)
 	} /* else count == 0 */
 
 	tty->driver_data = hp;
-	tty->low_latency = 1; /* Makes flushes to ldisc synchronous. */
 
 	hp->tty = tty;
 
@@ -764,13 +763,11 @@ struct hvc_struct __devinit *hvc_alloc(uint32_t vtermno, int data,
 			return ERR_PTR(err);
 	}
 
-	hp = kmalloc(ALIGN(sizeof(*hp), sizeof(long)) + outbuf_size,
+	hp = kzalloc(ALIGN(sizeof(*hp), sizeof(long)) + outbuf_size,
 			GFP_KERNEL);
 	if (!hp)
 		return ERR_PTR(-ENOMEM);
 
-	memset(hp, 0x00, sizeof(*hp));
-
 	hp->vtermno = vtermno;
 	hp->data = data;
 	hp->ops = ops;
@@ -876,8 +873,11 @@ static int hvc_init(void)
 		goto stop_thread;
 	}
 
-	/* FIXME: This mb() seems completely random.  Remove it. */
-	mb();
+	/*
+	 * Make sure tty is fully registered before allowing it to be
+	 * found by hvc_console_device.
+	 */
+	smp_mb();
 	hvc_driver = drv;
 	return 0;