1 files changed, 15 insertions, 10 deletions

diff --git a/arch/i386/kernel/cpu/common.c b/arch/i386/kernel/cpu/common.c
index 44f2c5f2dda1..70c87de582c7 100644
--- a/arch/i386/kernel/cpu/common.c
+++ b/arch/i386/kernel/cpu/common.c
@@ -294,7 +294,7 @@ void __cpuinit generic_identify(struct cpuinfo_x86 * c)
 			if (c->x86 >= 0x6)
 				c->x86_model += ((tfms >> 16) & 0xF) << 4;
 			c->x86_mask = tfms & 15;
-#ifdef CONFIG_SMP
+#ifdef CONFIG_X86_HT
 			c->apicid = phys_pkg_id((ebx >> 24) & 0xFF, 0);
 #else
 			c->apicid = (ebx >> 24) & 0xFF;
@@ -319,7 +319,7 @@ void __cpuinit generic_identify(struct cpuinfo_x86 * c)
 	early_intel_workaround(c);
 
 #ifdef CONFIG_X86_HT
-	phys_proc_id[smp_processor_id()] = (cpuid_ebx(1) >> 24) & 0xff;
+	c->phys_proc_id = (cpuid_ebx(1) >> 24) & 0xff;
 #endif
 }
 
@@ -477,11 +477,9 @@ void __cpuinit detect_ht(struct cpuinfo_x86 *c)
 {
 	u32 	eax, ebx, ecx, edx;
 	int 	index_msb, core_bits;
-	int 	cpu = smp_processor_id();
 
 	cpuid(1, &eax, &ebx, &ecx, &edx);
 
-
 	if (!cpu_has(c, X86_FEATURE_HT) || cpu_has(c, X86_FEATURE_CMP_LEGACY))
 		return;
 
@@ -492,16 +490,17 @@ void __cpuinit detect_ht(struct cpuinfo_x86 *c)
 	} else if (smp_num_siblings > 1 ) {
 
 		if (smp_num_siblings > NR_CPUS) {
-			printk(KERN_WARNING "CPU: Unsupported number of the siblings %d", smp_num_siblings);
+			printk(KERN_WARNING "CPU: Unsupported number of the "
+					"siblings %d", smp_num_siblings);
 			smp_num_siblings = 1;
 			return;
 		}
 
 		index_msb = get_count_order(smp_num_siblings);
-		phys_proc_id[cpu] = phys_pkg_id((ebx >> 24) & 0xFF, index_msb);
+		c->phys_proc_id = phys_pkg_id((ebx >> 24) & 0xFF, index_msb);
 
 		printk(KERN_INFO  "CPU: Physical Processor ID: %d\n",
-		       phys_proc_id[cpu]);
+		       c->phys_proc_id);
 
 		smp_num_siblings = smp_num_siblings / c->x86_max_cores;
 
@@ -509,12 +508,12 @@ void __cpuinit detect_ht(struct cpuinfo_x86 *c)
 
 		core_bits = get_count_order(c->x86_max_cores);
 
-		cpu_core_id[cpu] = phys_pkg_id((ebx >> 24) & 0xFF, index_msb) &
+		c->cpu_core_id = phys_pkg_id((ebx >> 24) & 0xFF, index_msb) &
 					       ((1 << core_bits) - 1);
 
 		if (c->x86_max_cores > 1)
 			printk(KERN_INFO  "CPU: Processor Core ID: %d\n",
-			       cpu_core_id[cpu]);
+			       c->cpu_core_id);
 	}
 }
 #endif
@@ -613,6 +612,12 @@ void __cpuinit cpu_init(void)
 		set_in_cr4(X86_CR4_TSD);
 	}
 
+	/* The CPU hotplug case */
+	if (cpu_gdt_descr->address) {
+		gdt = (struct desc_struct *)cpu_gdt_descr->address;
+		memset(gdt, 0, PAGE_SIZE);
+		goto old_gdt;
+	}
 	/*
 	 * This is a horrible hack to allocate the GDT.  The problem
 	 * is that cpu_init() is called really early for the boot CPU
@@ -631,7 +636,7 @@ void __cpuinit cpu_init(void)
 				local_irq_enable();
 		}
 	}
-
+old_gdt:
 	/*
 	 * Initialize the per-CPU GDT with the boot GDT,
 	 * and set up the GDT descriptor: