x86: add stub init_gbpages() for 32-bit init_memory_mapping()

Impact: cleanup

This patch adds an empty static inline init_gbpages() for the 32-bit
version of init_memory_mapping() making both versions identical.
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <1236257708-27269-13-git-send-email-penberg@cs.helsinki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/mm/init_32.c

@@ -922,6 +922,10 @@ static int save_mr(struct map_range *mr, int nr_range,
 	return nr_range;
 }
 
+static inline void init_gbpages(void)
+{
+}
+
 /*
  * Setup the direct mapping of the physical memory at PAGE_OFFSET.
  * This runs before bootmem is initialized and gets pages directly from
@@ -941,6 +945,9 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
 
 	printk(KERN_INFO "init_memory_mapping: %016lx-%016lx\n", start, end);
 
+	if (!after_bootmem)
+		init_gbpages();
+
 #ifdef CONFIG_DEBUG_PAGEALLOC
 	/*
 	 * For CONFIG_DEBUG_PAGEALLOC, identity mapping will use small pages.