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/char/sonypi.c b/drivers/char/sonypi.c
index dbcb3bd..0798754 100644
--- a/drivers/char/sonypi.c
+++ b/drivers/char/sonypi.c
@@ -777,7 +777,7 @@
 {
 	struct sonypi_keypress kp;
 
-	while (kfifo_get_locked(&sonypi_device.input_fifo, (unsigned char *)&kp,
+	while (kfifo_out_locked(&sonypi_device.input_fifo, (unsigned char *)&kp,
 			 sizeof(kp), &sonypi_device.input_fifo_lock)
 			== sizeof(kp)) {
 		msleep(10);
@@ -828,7 +828,7 @@
 	if (kp.dev) {
 		input_report_key(kp.dev, kp.key, 1);
 		input_sync(kp.dev);
-		kfifo_put_locked(&sonypi_device.input_fifo,
+		kfifo_in_locked(&sonypi_device.input_fifo,
 			(unsigned char *)&kp, sizeof(kp),
 			&sonypi_device.input_fifo_lock);
 		schedule_work(&sonypi_device.input_work);
@@ -882,7 +882,7 @@
 		acpi_bus_generate_proc_event(sonypi_acpi_device, 1, event);
 #endif
 
-	kfifo_put_locked(&sonypi_device.fifo, (unsigned char *)&event,
+	kfifo_in_locked(&sonypi_device.fifo, (unsigned char *)&event,
 			sizeof(event), &sonypi_device.fifo_lock);
 	kill_fasync(&sonypi_device.fifo_async, SIGIO, POLL_IN);
 	wake_up_interruptible(&sonypi_device.fifo_proc_list);
@@ -932,7 +932,7 @@
 		return ret;
 
 	while (ret < count &&
-	       (kfifo_get_locked(&sonypi_device.fifo, &c, sizeof(c),
+	       (kfifo_out_locked(&sonypi_device.fifo, &c, sizeof(c),
 				 &sonypi_device.fifo_lock) == sizeof(c))) {
 		if (put_user(c, buf++))
 			return -EFAULT;