[PATCH] uml: locking commentary in the random driver

Comment the lack of locking.
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/um/drivers/random.c

@@ -78,6 +78,7 @@ static const struct file_operations rng_chrdev_ops = {
 	.read		= rng_dev_read,
 };
 
+/* rng_init shouldn't be called more than once at boot time */
 static struct miscdevice rng_miscdev = {
 	RNG_MISCDEV_MINOR,
 	RNG_MODULE_NAME,