x86/apic: Remove pointless x86_bios_cpu_apicid

It's a useless copy of x86_cpu_to_apicid.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Sohil Mehta <sohil.mehta@intel.com>
Tested-by: Juergen Gross <jgross@suse.com> # Xen PV (dom0 and unpriv. guest)

arch/x86/include/asm/apic.h

@@ -477,8 +477,6 @@ extern void generic_bigsmp_probe(void);
 
 #define APIC_DFR_VALUE	(APIC_DFR_FLAT)
 
-DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid);
-
 extern struct apic apic_noop;
 
 static inline unsigned int read_apic_id(void)

arch/x86/include/asm/smp.h

@@ -22,7 +22,6 @@ DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_l2c_id);
 
 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid);
 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid);
-DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid);
 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
 DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid);
 #endif

arch/x86/kernel/apic/apic.c

@@ -108,10 +108,8 @@ unsigned long apic_mmio_base __ro_after_init;
  * Map cpu index to physical APIC ID
  */
 DEFINE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid, BAD_APICID);
-DEFINE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid, BAD_APICID);
 DEFINE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid, U32_MAX);
 EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_apicid);
-EXPORT_EARLY_PER_CPU_SYMBOL(x86_bios_cpu_apicid);
 EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_acpiid);
 
 #ifdef CONFIG_X86_32
@@ -2511,7 +2509,7 @@ int generic_processor_info(int apicid, int version)
 
 	if (apicid == boot_cpu_physical_apicid) {
 		/*
-		 * x86_bios_cpu_apicid is required to have processors listed
+		 * x86_cpu_to_apicid is required to have processors listed
 		 * in same order as logical cpu numbers. Hence the first
 		 * entry is BSP, and so on.
 		 * boot_cpu_init() already hold bit 0 in cpu_present_mask
@@ -2548,7 +2546,6 @@ int generic_processor_info(int apicid, int version)
 
 #if defined(CONFIG_SMP) || defined(CONFIG_X86_64)
 	early_per_cpu(x86_cpu_to_apicid, cpu) = apicid;
-	early_per_cpu(x86_bios_cpu_apicid, cpu) = apicid;
 #endif
 #ifdef CONFIG_X86_32
 	early_per_cpu(x86_cpu_to_logical_apicid, cpu) =

arch/x86/kernel/apic/apic_common.c

@@ -29,7 +29,7 @@ void default_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
 int default_cpu_present_to_apicid(int mps_cpu)
 {
 	if (mps_cpu < nr_cpu_ids && cpu_present(mps_cpu))
-		return (int)per_cpu(x86_bios_cpu_apicid, mps_cpu);
+		return (int)per_cpu(x86_cpu_to_apicid, mps_cpu);
 	else
 		return BAD_APICID;
 }

arch/x86/kernel/apic/bigsmp_32.c

@@ -52,7 +52,7 @@ static void bigsmp_setup_apic_routing(void)
 static int bigsmp_cpu_present_to_apicid(int mps_cpu)
 {
 	if (mps_cpu < nr_cpu_ids)
-		return (int) per_cpu(x86_bios_cpu_apicid, mps_cpu);
+		return (int) per_cpu(x86_cpu_to_apicid, mps_cpu);
 
 	return BAD_APICID;
 }

arch/x86/kernel/apic/probe_64.c

@@ -13,9 +13,7 @@
 
 #include "local.h"
 
-/*
- * Check the APIC IDs in bios_cpu_apicid and choose the APIC mode.
- */
+/* Select the appropriate APIC driver */
 void __init default_setup_apic_routing(void)
 {
 	struct apic **drv;

arch/x86/kernel/setup_percpu.c

@@ -181,8 +181,6 @@ void __init setup_per_cpu_areas(void)
 #ifdef CONFIG_X86_LOCAL_APIC
 		per_cpu(x86_cpu_to_apicid, cpu) =
 			early_per_cpu_map(x86_cpu_to_apicid, cpu);
-		per_cpu(x86_bios_cpu_apicid, cpu) =
-			early_per_cpu_map(x86_bios_cpu_apicid, cpu);
 		per_cpu(x86_cpu_to_acpiid, cpu) =
 			early_per_cpu_map(x86_cpu_to_acpiid, cpu);
 #endif
@@ -214,7 +212,6 @@ void __init setup_per_cpu_areas(void)
 	/* indicate the early static arrays will soon be gone */
 #ifdef CONFIG_X86_LOCAL_APIC
 	early_per_cpu_ptr(x86_cpu_to_apicid) = NULL;
-	early_per_cpu_ptr(x86_bios_cpu_apicid) = NULL;
 	early_per_cpu_ptr(x86_cpu_to_acpiid) = NULL;
 #endif
 #ifdef CONFIG_X86_32