diff --git a/arch/i386/kernel/smpboot.c b/arch/i386/kernel/smpboot.c
index cbea7ac..35bfe13 100644
--- a/arch/i386/kernel/smpboot.c
+++ b/arch/i386/kernel/smpboot.c
@@ -888,6 +888,7 @@
 
 cpumask_t cpu_sibling_map[NR_CPUS] __cacheline_aligned;
 cpumask_t cpu_core_map[NR_CPUS] __cacheline_aligned;
+EXPORT_SYMBOL(cpu_core_map);
 
 static void __init smp_boot_cpus(unsigned int max_cpus)
 {
diff --git a/arch/x86_64/kernel/smpboot.c b/arch/x86_64/kernel/smpboot.c
index 5abdee1..f1ec0f3 100644
--- a/arch/x86_64/kernel/smpboot.c
+++ b/arch/x86_64/kernel/smpboot.c
@@ -94,6 +94,7 @@
 
 cpumask_t cpu_sibling_map[NR_CPUS] __cacheline_aligned;
 cpumask_t cpu_core_map[NR_CPUS] __cacheline_aligned;
+EXPORT_SYMBOL(cpu_core_map);
 
 /*
  * Trampoline 80x86 program as an array.