[PATCH] x86_64: Rename the extended cpuid level field

It was confusingly named.

Signed-off-by: Andi Kleen <ak@suse.de>
DESC
x86_64: Switch SMP bootup over to new CPU hotplug state machine
EDESC
From: "Andi Kleen" <ak@suse.de>

This will allow hotplug CPU in the future and in general cleans up a lot of
crufty code.  It also should plug some races that the old hackish way
introduces.  Remove one old race workaround in NMI watchdog setup that is not
needed anymore.

I removed the old total sum of bogomips reporting code.  The brag value of
BogoMips has been greatly devalued in the last years on the open market.

Real CPU hotplug will need some more work, but the infrastructure for it is
there now.

One drawback: the new TSC sync algorithm is less accurate than before.  The
old way of zeroing TSCs is too intrusive to do later.  Instead the TSC of the
BP is duplicated now, which is less accurate.

Cc: <rusty@rustcorp.com.au>
Cc: <mingo@elte.hu>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/x86_64/kernel/setup.c

@@ -673,7 +673,7 @@ static int __init get_model_name(struct cpuinfo_x86 *c)
 {
 	unsigned int *v;
 
-	if (c->x86_cpuid_level < 0x80000004)
+	if (c->extended_cpuid_level < 0x80000004)
 		return 0;
 
 	v = (unsigned int *) c->x86_model_id;
@@ -689,7 +689,7 @@ static void __init display_cacheinfo(struct cpuinfo_x86 *c)
 {
 	unsigned int n, dummy, eax, ebx, ecx, edx;
 
-	n = c->x86_cpuid_level;
+	n = c->extended_cpuid_level;
 
 	if (n >= 0x80000005) {
 		cpuid(0x80000005, &dummy, &ebx, &ecx, &edx);
@@ -781,7 +781,7 @@ static int __init init_amd(struct cpuinfo_x86 *c)
 	} 
 	display_cacheinfo(c);
 
-	if (c->x86_cpuid_level >= 0x80000008) {
+	if (c->extended_cpuid_level >= 0x80000008) {
 		c->x86_num_cores = (cpuid_ecx(0x80000008) & 0xff) + 1;
 		if (c->x86_num_cores & (c->x86_num_cores - 1))
 			c->x86_num_cores = 1;
@@ -841,7 +841,6 @@ static void __init detect_ht(struct cpuinfo_x86 *c)
 		if (smp_num_siblings & (smp_num_siblings - 1))
 			index_msb++;
 
-		/* RED-PEN surely this must run in the non HT case too! -AK */
 		cpu_core_id[cpu] = phys_pkg_id(index_msb);
 
 		if (c->x86_num_cores > 1)
@@ -878,7 +877,7 @@ static void __init init_intel(struct cpuinfo_x86 *c)
 	unsigned n;
 
 	init_intel_cacheinfo(c);
-	n = c->x86_cpuid_level;
+	n = c->extended_cpuid_level;
 	if (n >= 0x80000008) {
 		unsigned eax = cpuid_eax(0x80000008);
 		c->x86_virt_bits = (eax >> 8) & 0xff;
@@ -927,7 +926,7 @@ void __init early_identify_cpu(struct cpuinfo_x86 *c)
 	c->x86_cache_alignment = c->x86_clflush_size;
 	c->x86_num_cores = 1;
 	c->x86_apicid = c == &boot_cpu_data ? 0 : c - cpu_data;
-	c->x86_cpuid_level = 0;
+	c->extended_cpuid_level = 0;
 	memset(&c->x86_capability, 0, sizeof c->x86_capability);
 
 	/* Get vendor name */
@@ -974,7 +973,7 @@ void __init identify_cpu(struct cpuinfo_x86 *c)
 
 	/* AMD-defined flags: level 0x80000001 */
 	xlvl = cpuid_eax(0x80000000);
-	c->x86_cpuid_level = xlvl;
+	c->extended_cpuid_level = xlvl;
 	if ((xlvl & 0xffff0000) == 0x80000000) {
 		if (xlvl >= 0x80000001) {
 			c->x86_capability[1] = cpuid_edx(0x80000001);

include/asm-x86_64/processor.h

@@ -64,7 +64,7 @@ struct cpuinfo_x86 {
 	__u8	x86_num_cores;
 	__u8	x86_apicid;
         __u32   x86_power; 	
-	__u32   x86_cpuid_level;	/* Max CPUID function supported */
+	__u32   extended_cpuid_level;	/* Max extended CPUID function supported */
 	unsigned long loops_per_jiffy;
 } ____cacheline_aligned;