mm/memblock.c: add debug output for memblock_add()

memblock_reserve() calls memblock_reserve_region() which prints debugging
information if 'memblock=debug' was passed on the command line. This
patch adds the same behaviour, but for memblock_add function().

[[e-mail]: s/memblock_memory/memblock_add/ in message]
Signed-off-by: Alexander Kuleshov <[e-mail]>
Cc: Martin Schwidefsky <[e-mail]>
Cc: Philipp Hachtmann <[e-mail]>
Cc: Fabian Frederick <[e-mail]>
Cc: Catalin Marinas <[e-mail]>
Cc: Emil Medve <[e-mail]>
Cc: Akinobu Mita <[e-mail]>
Cc: Tang Chen <[e-mail]>
Cc: Tony Luck <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

mm/memblock.c

···
 	return memblock_add_range(&memblock.memory, base, size, nid, 0);
 }
 
+static int __init_memblock memblock_add_region(phys_addr_t base,
+						phys_addr_t size,
+						int nid,
+						unsigned long flags)
+{
+	struct memblock_type *_rgn = &memblock.memory;
+
+	memblock_dbg("memblock_add: [%#016llx-%#016llx] flags %#02lx %pF\n",
+		     (unsigned long long)base,
+		     (unsigned long long)base + size - 1,
+		     flags, (void *)_RET_IP_);
+
+	return memblock_add_range(_rgn, base, size, nid, flags);
+}
+
 int __init_memblock memblock_add(phys_addr_t base, phys_addr_t size)
 {
-	return memblock_add_range(&memblock.memory, base, size,
-				   MAX_NUMNODES, 0);
+	return memblock_add_region(base, size, MAX_NUMNODES, 0);
 }
 
 /**