diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index b081413c72d43c0a8e27be63c3433e1d948ff84b..172dcc3849a0f9ad32bc5838c3a847a4e6c6420a 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -430,9 +430,11 @@ static int __init early_parse_mem(char *p)
 }
 early_param("mem", early_parse_mem);
 
-/*
- * The device tree may be allocated below our memory limit, or inside the
- * crash kernel region for kdump. If so, move it out now.
+/**
+ * move_device_tree - move tree to an unused area, if needed.
+ *
+ * The device tree may be allocated beyond our memory limit, or inside the
+ * crash kernel region for kdump. If so, move it out of the way.
  */
 static void move_device_tree(void)
 {
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 6018178708a55f76be298d405c0fd8d76c9af6b2..3089eaed3256c7dda38f6922679cfeef57693019 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -181,9 +181,9 @@ void __init early_setup(unsigned long dt_ptr)
  	DBG(" -> early_setup(), dt_ptr: 0x%lx\n", dt_ptr);
 
 	/*
-	 * Do early initializations using the flattened device
-	 * tree, like retreiving the physical memory map or
-	 * calculating/retreiving the hash table size
+	 * Do early initialization using the flattened device
+	 * tree, such as retrieving the physical memory map or
+	 * calculating/retrieving the hash table size.
 	 */
 	early_init_devtree(__va(dt_ptr));