x86, apic: clean up the cpu_2_logical_apiciddeclaration

extern declarations were scattered in 4 files - consolidate them
into apic.h.
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/include/asm/apic.h

@@ -541,4 +541,8 @@ static inline physid_mask_t default_apicid_to_cpu_present(int phys_apicid)
 
 #endif /* CONFIG_X86_LOCAL_APIC */
 
+#ifdef CONFIG_X86_32
+extern u8 cpu_2_logical_apicid[NR_CPUS];
+#endif
+
 #endif /* _ASM_X86_APIC_H */

arch/x86/kernel/bigsmp_32.c

@@ -99,8 +99,6 @@ static inline physid_mask_t bigsmp_apicid_to_cpu_present(int phys_apicid)
 	return physid_mask_of_physid(phys_apicid);
 }
 
-extern u8 cpu_2_logical_apicid[];
-
 /* Mapping from cpu number to logical apicid */
 static inline int bigsmp_cpu_to_logical_apicid(int cpu)
 {

arch/x86/kernel/es7000_32.c

@@ -403,7 +403,6 @@ void __init es7000_enable_apic_mode(void)
 
 extern void es7000_enable_apic_mode(void);
 extern int apic_version [MAX_APICS];
-extern u8 cpu_2_logical_apicid[];
 extern unsigned int boot_cpu_physical_apicid;
 
 extern int parse_unisys_oem (char *oemptr);
@@ -570,7 +569,7 @@ static int es7000_cpu_to_logical_apicid(int cpu)
 #ifdef CONFIG_SMP
 	if (cpu >= nr_cpu_ids)
 		return BAD_APICID;
-	return (int)cpu_2_logical_apicid[cpu];
+	return cpu_2_logical_apicid[cpu];
 #else
 	return logical_smp_processor_id();
 #endif

arch/x86/kernel/numaq_32.c

@@ -408,14 +408,11 @@ static inline physid_mask_t numaq_ioapic_phys_id_map(physid_mask_t phys_map)
 	return physids_promote(0xFUL);
 }
 
-/* Mapping from cpu number to logical apicid */
-extern u8 cpu_2_logical_apicid[];
-
 static inline int numaq_cpu_to_logical_apicid(int cpu)
 {
 	if (cpu >= nr_cpu_ids)
 		return BAD_APICID;
-	return (int)cpu_2_logical_apicid[cpu];
+	return cpu_2_logical_apicid[cpu];
 }
 
 /*

arch/x86/kernel/summit_32.c

@@ -209,8 +209,6 @@ static inline unsigned long summit_check_apicid_present(int bit)
 
 #define apicid_cluster(apicid) ((apicid) & XAPIC_DEST_CLUSTER_MASK)
 
-extern u8 cpu_2_logical_apicid[];
-
 static inline void summit_init_apic_ldr(void)
 {
 	unsigned long val, id;
@@ -264,7 +262,7 @@ static inline int summit_cpu_to_logical_apicid(int cpu)
 #ifdef CONFIG_SMP
 	if (cpu >= nr_cpu_ids)
 		return BAD_APICID;
-	return (int)cpu_2_logical_apicid[cpu];
+	return cpu_2_logical_apicid[cpu];
 #else
 	return logical_smp_processor_id();
 #endif