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-rw-r--r--drivers/char/misc.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/char/misc.c b/drivers/char/misc.c
index ffa97d261cf3..c892c296a4de 100644
--- a/drivers/char/misc.c
+++ b/drivers/char/misc.c
@@ -169,7 +169,9 @@ static const struct file_operations misc_fops = {
* the minor number requested is used.
*
* The structure passed is linked into the kernel and may not be
- * destroyed until it has been unregistered.
+ * destroyed until it has been unregistered. By default, an open()
+ * syscall to the device sets file->private_data to point to the
+ * structure. Drivers don't need open in fops for this.
*
* A zero is returned on success and a negative errno code for
* failure.