diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 5e5126e..d57dfff 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -59,6 +59,8 @@
 
 static noinline int do_test_wp_bit(void);
 
+bool __read_mostly __vmalloc_start_set = false;
+
 static __init void *alloc_low_page(void)
 {
 	unsigned long pfn = e820_table_end++;
@@ -757,6 +759,8 @@
 #ifdef CONFIG_FLATMEM
 	max_mapnr = num_physpages;
 #endif
+	__vmalloc_start_set = true;
+
 	printk(KERN_NOTICE "%ldMB LOWMEM available.\n",
 			pages_to_mb(max_low_pfn));