X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=arch%2Fum%2Fdrivers%2Frandom.c;h=e942e836f9954335651fc3c2b6587c2bd7d7e888;hb=87a72f9e171e558a0288aa83ef1dc6ae4af32224;hp=ba471f5864a6d7d6815f3847a36aa78b4ed1a5e3;hpb=a892acacd3a8546ac161526522f13b5174f2c471;p=linux-2.6

diff --git a/arch/um/drivers/random.c b/arch/um/drivers/random.c
index ba471f5864..e942e836f9 100644
--- a/arch/um/drivers/random.c
+++ b/arch/um/drivers/random.c
@@ -20,6 +20,10 @@
 
 #define RNG_MISCDEV_MINOR		183 /* official */
 
+/* Changed at init time, in the non-modular case, and at module load
+ * time, in the module case.  Presumably, the module subsystem
+ * protects against a module being loaded twice at the same time.
+ */
 static int random_fd = -1;
 
 static int rng_dev_open (struct inode *inode, struct file *filp)
@@ -68,12 +72,13 @@ static ssize_t rng_dev_read (struct file *filp, char __user *buf, size_t size,
 	return ret;
 }
 
-static struct file_operations rng_chrdev_ops = {
+static const struct file_operations rng_chrdev_ops = {
 	.owner		= THIS_MODULE,
 	.open		= rng_dev_open,
 	.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,