diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
index fc38195..bef5717 100644
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -592,14 +592,14 @@
 #endif
 
 static inline unsigned int
-default_cpu_mask_to_apicid(const struct cpumask *cpumask)
+flat_cpu_mask_to_apicid(const struct cpumask *cpumask)
 {
 	return cpumask_bits(cpumask)[0] & APIC_ALL_CPUS;
 }
 
 static inline unsigned int
-default_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
-			       const struct cpumask *andmask)
+flat_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
+			    const struct cpumask *andmask)
 {
 	unsigned long mask1 = cpumask_bits(cpumask)[0];
 	unsigned long mask2 = cpumask_bits(andmask)[0];
@@ -608,6 +608,13 @@
 	return (unsigned int)(mask1 & mask2 & mask3);
 }
 
+extern unsigned int
+default_cpu_mask_to_apicid(const struct cpumask *cpumask);
+
+extern unsigned int
+default_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
+			       const struct cpumask *andmask);
+
 static inline unsigned long default_check_apicid_used(physid_mask_t *map, int apicid)
 {
 	return physid_isset(apicid, *map);