diff --git a/arch/m32r/include/asm/smp.h b/arch/m32r/include/asm/smp.h
index cf7829a615513e1597d903c6398348d8e0d5ac1e..c689b828dfe2b0b218d6ec523c0233fddd086785 100644
--- a/arch/m32r/include/asm/smp.h
+++ b/arch/m32r/include/asm/smp.h
@@ -79,11 +79,6 @@ static __inline__ int cpu_number_map(int cpu)
 	return cpu;
 }
 
-static __inline__ unsigned int num_booting_cpus(void)
-{
-	return cpumask_weight(&cpu_callout_map);
-}
-
 extern void smp_send_timer(void);
 extern unsigned long send_IPI_mask_phys(const cpumask_t*, int, int);
 
diff --git a/arch/x86/include/asm/smp.h b/arch/x86/include/asm/smp.h
index f48394513c377b3d540c6c0ec7da258645d3b06e..2ffa95dc2333bcc5a36efb898fd7ad12e95f5842 100644
--- a/arch/x86/include/asm/smp.h
+++ b/arch/x86/include/asm/smp.h
@@ -169,11 +169,6 @@ void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle);
 void smp_store_cpu_info(int id);
 #define cpu_physical_id(cpu)	per_cpu(x86_cpu_to_apicid, cpu)
 
-/* We don't mark CPUs online until __cpu_up(), so we need another measure */
-static inline int num_booting_cpus(void)
-{
-	return cpumask_weight(cpu_callout_mask);
-}
 #else /* !CONFIG_SMP */
 #define wbinvd_on_cpu(cpu)     wbinvd()
 static inline int wbinvd_on_all_cpus(void)
diff --git a/include/linux/smp.h b/include/linux/smp.h
index a34d4f15430d2d3067bb5639e0a21a3d3083e84b..dd6f06be3c9feb18ddc0a3752aaa43797c38fd08 100644
--- a/include/linux/smp.h
+++ b/include/linux/smp.h
@@ -177,7 +177,6 @@ static inline int up_smp_call_function(smp_call_func_t func, void *info)
 	} while (0)
 
 static inline void smp_send_reschedule(int cpu) { }
-#define num_booting_cpus()			1
 #define smp_prepare_boot_cpu()			do {} while (0)
 #define smp_call_function_many(mask, func, info, wait) \
 			(up_smp_call_function(func, info))