kfifo: rename kfifo_put... into kfifo_in... and kfifo_get... into kfifo_out...

rename kfifo_put...  into kfifo_in...  to prevent miss use of old non in
kernel-tree drivers

ditto for kfifo_get...  -> kfifo_out...

Improve the prototypes of kfifo_in and kfifo_out to make the kerneldoc
annotations more readable.

Add mini "howto porting to the new API" in kfifo.h

Signed-off-by: Stefani Seibold <stefani@seibold.net>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/net/wireless/libertas/main.c b/drivers/net/wireless/libertas/main.c
index 0622104..2bcfa74 100644
--- a/drivers/net/wireless/libertas/main.c
+++ b/drivers/net/wireless/libertas/main.c
@@ -513,7 +513,8 @@
 		spin_lock_irq(&priv->driver_lock);
 		while (kfifo_len(&priv->event_fifo)) {
 			u32 event;
-			kfifo_get(&priv->event_fifo, (unsigned char *) &event,
+
+			kfifo_out(&priv->event_fifo, (unsigned char *) &event,
 				sizeof(event));
 			spin_unlock_irq(&priv->driver_lock);
 			lbs_process_event(priv, event);
@@ -1175,7 +1176,7 @@
 	if (priv->psstate == PS_STATE_SLEEP)
 		priv->psstate = PS_STATE_AWAKE;
 
-	kfifo_put(&priv->event_fifo, (unsigned char *) &event, sizeof(u32));
+	kfifo_in(&priv->event_fifo, (unsigned char *) &event, sizeof(u32));
 
 	wake_up_interruptible(&priv->waitq);