fix comment typos in avc.c

Signed-off-by: NJustin P. Mattock <justinmattock@gmail.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

security/selinux/avc.c

@@ -337,7 +337,7 @@ static inline struct avc_node *avc_search_node(u32 ssid, u32 tsid, u16 tclass)
  * Look up an AVC entry that is valid for the
  * (@ssid, @tsid), interpreting the permissions
  * based on @tclass.  If a valid AVC entry exists,
- * then this function return the avc_node.
+ * then this function returns the avc_node.
  * Otherwise, this function returns NULL.
  */
 static struct avc_node *avc_lookup(u32 ssid, u32 tsid, u16 tclass)
@@ -526,7 +526,7 @@ void avc_audit(u32 ssid, u32 tsid,
  * @perms: permissions
  *
  * Register a callback function for events in the set @events
- * related to the SID pair (@ssid, @tsid) and
+ * related to the SID pair (@ssid, @tsid) 
  * and the permissions @perms, interpreting
  * @perms based on @tclass.  Returns %0 on success or
  * -%ENOMEM if insufficient memory exists to add the callback.
@@ -571,7 +571,7 @@ static inline int avc_sidcmp(u32 x, u32 y)
  *
  * if a valid AVC entry doesn't exist,this function returns -ENOENT.
  * if kmalloc() called internal returns NULL, this function returns -ENOMEM.
- * otherwise, this function update the AVC entry. The original AVC-entry object
+ * otherwise, this function updates the AVC entry. The original AVC-entry object
  * will release later by RCU.
  */
 static int avc_update_node(u32 event, u32 perms, u32 ssid, u32 tsid, u16 tclass,