powerpc/vmemmap: Reshuffle vmemmap_free()

Removes an indentation level and shuffles some code around to make the
following patch cleaner. No functional changes.
Reviewed-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/mm/init_64.c

@@ -255,13 +255,15 @@ static unsigned long vmemmap_list_free(unsigned long start)
 void __ref vmemmap_free(unsigned long start, unsigned long end)
 {
 	unsigned long page_size = 1 << mmu_psize_defs[mmu_vmemmap_psize].shift;
+	unsigned long page_order = get_order(page_size);
 
 	start = _ALIGN_DOWN(start, page_size);
 
 	pr_debug("vmemmap_free %lx...%lx\n", start, end);
 
 	for (; start < end; start += page_size) {
-		unsigned long addr;
+		unsigned long nr_pages, addr;
+		struct page *page;
 
 		/*
 		 * the section has already be marked as invalid, so
@@ -272,8 +274,11 @@ void __ref vmemmap_free(unsigned long start, unsigned long end)
 			continue;
 
 		addr = vmemmap_list_free(start);
-		if (addr) {
-			struct page *page = pfn_to_page(addr >> PAGE_SHIFT);
+		if (!addr)
+			continue;
+
+		page = pfn_to_page(addr >> PAGE_SHIFT);
+		nr_pages = 1 << page_order;
 
 		if (PageReserved(page)) {
 			/* allocated from bootmem */
@@ -284,18 +289,15 @@ void __ref vmemmap_free(unsigned long start, unsigned long end)
 				 */
 				WARN_ON_ONCE(1);
 			} else {
-					unsigned int nr_pages =
-						1 << get_order(page_size);
 				while (nr_pages--)
 					free_reserved_page(page++);
 			}
-			} else
-				free_pages((unsigned long)(__va(addr)),
-							get_order(page_size));
+		} else {
+			free_pages((unsigned long)(__va(addr)), page_order);
+		}
 
 		vmemmap_remove_mapping(start, page_size);
 	}
-	}
 }
 #endif
 void register_page_bootmem_memmap(unsigned long section_nr,