1 files changed, 23 insertions, 15 deletions

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index a9e3791ca09..e2962cc1e27 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -70,7 +70,7 @@ cpumask_t cpu_callin_map;
 #endif /* CONFIG_X86_32 */
 
 
-static struct cpu_dev *this_cpu __cpuinitdata;
+static const struct cpu_dev *this_cpu __cpuinitdata;
 
 DEFINE_PER_CPU_PAGE_ALIGNED(struct gdt_page, gdt_page) = { .gdt = {
 #ifdef CONFIG_X86_64
@@ -284,9 +284,9 @@ static void __cpuinit filter_cpuid_features(struct cpuinfo_x86 *c, bool warn)
  */
 
 /* Look up CPU names by table lookup. */
-static char __cpuinit *table_lookup_model(struct cpuinfo_x86 *c)
+static const char *__cpuinit table_lookup_model(struct cpuinfo_x86 *c)
 {
-        struct cpu_model_info *info;
+        const struct cpu_model_info *info;
 
         if (c->x86_model >= 16)
                 return NULL;    /* Range check */
@@ -333,7 +333,7 @@ void switch_to_new_gdt(int cpu)
         load_percpu_segment(cpu);
 }
 
-static struct cpu_dev *cpu_devs[X86_VENDOR_NUM] = {};
+static const struct cpu_dev *__cpuinitdata cpu_devs[X86_VENDOR_NUM] = {};
 
 static void __cpuinit default_init(struct cpuinfo_x86 *c)
 {
@@ -352,7 +352,7 @@ static void __cpuinit default_init(struct cpuinfo_x86 *c)
 #endif
 }
 
-static struct cpu_dev __cpuinitdata default_cpu = {
+static const struct cpu_dev __cpuinitconst default_cpu = {
         .c_init = default_init,
         .c_vendor = "Unknown",
         .c_x86_vendor = X86_VENDOR_UNKNOWN,
@@ -574,13 +574,15 @@ static void __cpuinit get_cpu_cap(struct cpuinfo_x86 *c)
                 }
         }
 
-#ifdef CONFIG_X86_64
         if (c->extended_cpuid_level >= 0x80000008) {
                 u32 eax = cpuid_eax(0x80000008);
 
                 c->x86_virt_bits = (eax >> 8) & 0xff;
                 c->x86_phys_bits = eax & 0xff;
         }
+#ifdef CONFIG_X86_32
+        else if (cpu_has(c, X86_FEATURE_PAE) || cpu_has(c, X86_FEATURE_PSE36))
+                c->x86_phys_bits = 36;
 #endif
 
         if (c->extended_cpuid_level >= 0x80000007)
@@ -627,8 +629,12 @@ static void __init early_identify_cpu(struct cpuinfo_x86 *c)
 {
 #ifdef CONFIG_X86_64
         c->x86_clflush_size = 64;
+        c->x86_phys_bits = 36;
+        c->x86_virt_bits = 48;
 #else
         c->x86_clflush_size = 32;
+        c->x86_phys_bits = 32;
+        c->x86_virt_bits = 32;
 #endif
         c->x86_cache_alignment = c->x86_clflush_size;
 
@@ -659,12 +665,12 @@ static void __init early_identify_cpu(struct cpuinfo_x86 *c)
 
 void __init early_cpu_init(void)
 {
-        struct cpu_dev **cdev;
+        const struct cpu_dev *const *cdev;
         int count = 0;
 
         printk(KERN_INFO "KERNEL supported cpus:\n");
         for (cdev = __x86_cpu_dev_start; cdev < __x86_cpu_dev_end; cdev++) {
-                struct cpu_dev *cpudev = *cdev;
+                const struct cpu_dev *cpudev = *cdev;
                 unsigned int j;
 
                 if (count >= X86_VENDOR_NUM)
@@ -751,9 +757,13 @@ static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
         c->x86_coreid_bits = 0;
 #ifdef CONFIG_X86_64
         c->x86_clflush_size = 64;
+        c->x86_phys_bits = 36;
+        c->x86_virt_bits = 48;
 #else
         c->cpuid_level = -1;    /* CPUID not detected */
         c->x86_clflush_size = 32;
+        c->x86_phys_bits = 32;
+        c->x86_virt_bits = 32;
 #endif
         c->x86_cache_alignment = c->x86_clflush_size;
         memset(&c->x86_capability, 0, sizeof c->x86_capability);
@@ -793,7 +803,7 @@ static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
 
         /* If the model name is still unset, do table lookup. */
         if (!c->x86_model_id[0]) {
-                char *p;
+                const char *p;
                 p = table_lookup_model(c);
                 if (p)
                         strcpy(c->x86_model_id, p);
@@ -872,7 +882,7 @@ struct msr_range {
         unsigned        max;
 };
 
-static struct msr_range msr_range_array[] __cpuinitdata = {
+static const struct msr_range msr_range_array[] __cpuinitconst = {
         { 0x00000000, 0x00000418},
         { 0xc0000000, 0xc000040b},
         { 0xc0010000, 0xc0010142},
@@ -921,7 +931,7 @@ __setup("noclflush", setup_noclflush);
 
 void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
 {
-        char *vendor = NULL;
+        const char *vendor = NULL;
 
         if (c->x86_vendor < X86_VENDOR_NUM) {
                 vendor = this_cpu->c_vendor;
@@ -1139,8 +1149,7 @@ void __cpuinit cpu_init(void)
 
         atomic_inc(&init_mm.mm_count);
         me->active_mm = &init_mm;
-        if (me->mm)
-                BUG();
+        BUG_ON(me->mm);
         enter_lazy_tlb(&init_mm, me);
 
         load_sp0(t, &current->thread);
@@ -1197,8 +1206,7 @@ void __cpuinit cpu_init(void)
          */
         atomic_inc(&init_mm.mm_count);
         curr->active_mm = &init_mm;
-        if (curr->mm)
-                BUG();
+        BUG_ON(curr->mm);
         enter_lazy_tlb(&init_mm, curr);
 
         load_sp0(t, thread);