--- zzzz-none-000/linux-3.10.107/Documentation/kobject.txt	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/Documentation/kobject.txt	2021-02-04 17:41:59.000000000 +0000
@@ -173,7 +173,7 @@
 have been initialized properly, as userspace will instantly start to look
 for them when this call happens.
 
-When the kobject is removed from the kernel (details on how to do that is
+When the kobject is removed from the kernel (details on how to do that are
 below), the uevent for KOBJ_REMOVE will be automatically created by the
 kobject core, so the caller does not have to worry about doing that by
 hand.
@@ -342,7 +342,10 @@
 
 When you are finished with the kset, call:
   void kset_unregister(struct kset *kset);
-to destroy it.
+to destroy it.  This removes the kset from sysfs and decrements its reference
+count.  When the reference count goes to zero, the kset will be released.
+Because other references to the kset may still exist, the release may happen
+after kset_unregister() returns.
 
 An example of using a kset can be seen in the
 samples/kobject/kset-example.c file in the kernel tree.