docs/mm: memblock: add kernel-doc description for memblock types

Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

include/linux/memblock.h

@@ -20,7 +20,13 @@
 #define INIT_MEMBLOCK_REGIONS	128
 #define INIT_PHYSMEM_REGIONS	4
 
-/* Definition of memblock flags. */
+/**
+ * enum memblock_flags - definition of memory region attributes
+ * @MEMBLOCK_NONE: no special request
+ * @MEMBLOCK_HOTPLUG: hotpluggable region
+ * @MEMBLOCK_MIRROR: mirrored region
+ * @MEMBLOCK_NOMAP: don't add to kernel direct mapping
+ */
 enum memblock_flags {
 	MEMBLOCK_NONE		= 0x0,	/* No special request */
 	MEMBLOCK_HOTPLUG	= 0x1,	/* hotpluggable region */
@@ -28,6 +34,13 @@ enum memblock_flags {
 	MEMBLOCK_NOMAP		= 0x4,	/* don't add to kernel direct mapping */
 };
 
+/**
+ * struct memblock_region - represents a memory region
+ * @base: physical address of the region
+ * @size: size of the region
+ * @flags: memory region attributes
+ * @nid: NUMA node id
+ */
 struct memblock_region {
 	phys_addr_t base;
 	phys_addr_t size;
@@ -37,14 +50,30 @@ struct memblock_region {
 #endif
 };
 
+/**
+ * struct memblock_type - collection of memory regions of certain type
+ * @cnt: number of regions
+ * @max: size of the allocated array
+ * @total_size: size of all regions
+ * @regions: array of regions
+ * @name: the memory type symbolic name
+ */
 struct memblock_type {
-	unsigned long cnt;	/* number of regions */
-	unsigned long max;	/* size of the allocated array */
-	phys_addr_t total_size;	/* size of all regions */
+	unsigned long cnt;
+	unsigned long max;
+	phys_addr_t total_size;
 	struct memblock_region *regions;
 	char *name;
 };
 
+/**
+ * struct memblock - memblock allocator metadata
+ * @bottom_up: is bottom up direction?
+ * @current_limit: physical address of the current allocation limit
+ * @memory: usabe memory regions
+ * @reserved: reserved memory regions
+ * @physmem: all physical memory
+ */
 struct memblock {
 	bool bottom_up;  /* is bottom up direction? */
 	phys_addr_t current_limit;