Documentation: add UUID/GUID to kernel-api

Update kernel-doc notation in lib/uuid.c and then add UUID/GUID
function interfaces to kernel-api.
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
[jc: tweaked the uuid_is_valid() kerneldoc]
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/core-api/kernel-api.rst

@@ -148,6 +148,12 @@ Sorting
 .. kernel-doc:: lib/list_sort.c
    :export:
 
+UUID/GUID
+---------
+
+.. kernel-doc:: lib/uuid.c
+   :export:
+
 Memory Management in Linux
 ==========================
 

lib/uuid.c

@@ -29,15 +29,14 @@ EXPORT_SYMBOL(uuid_null);
 const u8 guid_index[16] = {3,2,1,0,5,4,7,6,8,9,10,11,12,13,14,15};
 const u8 uuid_index[16] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
 
-/***************************************************************
+/**
+ * generate_random_uuid - generate a random UUID
+ * @uuid: where to put the generated UUID
+ *
  * Random UUID interface
  *
- * Used here for a Boot ID, but can be useful for other kernel
- * drivers.
- ***************************************************************/
-
-/*
- * Generate random UUID
+ * Used to create a Boot ID or a filesystem UUID/GUID, but can be
+ * useful for other kernel drivers.
  */
 void generate_random_uuid(unsigned char uuid[16])
 {
@@ -73,12 +72,13 @@ void uuid_gen(uuid_t *bu)
 EXPORT_SYMBOL_GPL(uuid_gen);
 
 /**
-  * uuid_is_valid - checks if UUID string valid
+ * uuid_is_valid - checks if a UUID string is valid
  * @uuid:	UUID string to check
  *
  * Description:
  * It checks if the UUID string is following the format:
  *	xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
+ *
  * where x is a hex digit.
  *
  * Return: true if input is valid UUID string.