3 files changed, 11 insertions, 2 deletions

diff --git a/arch/i386/kernel/cpu/amd.c b/arch/i386/kernel/cpu/amd.c
index e7697e077f6b..4397f61705e2 100644
--- a/arch/i386/kernel/cpu/amd.c
+++ b/arch/i386/kernel/cpu/amd.c
@@ -216,6 +216,11 @@ static void __init init_amd(struct cpuinfo_x86 *c)
                         c->x86_max_cores = 1;
         }
 
+        if (cpuid_eax(0x80000000) >= 0x80000007) {
+                if (cpuid_edx(0x80000007) & (1<<8))
+                        set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
+        }
+
 #ifdef CONFIG_X86_HT
         /*
          * On a AMD dual core setup the lower bits of the APIC id
@@ -233,6 +238,7 @@ static void __init init_amd(struct cpuinfo_x86 *c)
                        cpu, c->x86_max_cores, cpu_core_id[cpu]);
         }
 #endif
+
 }
 
 static unsigned int amd_size_cache(struct cpuinfo_x86 * c, unsigned int size)
diff --git a/arch/i386/kernel/cpu/intel.c b/arch/i386/kernel/cpu/intel.c
index 5e2da704f0fa..8c0120186b9f 100644
--- a/arch/i386/kernel/cpu/intel.c
+++ b/arch/i386/kernel/cpu/intel.c
@@ -183,10 +183,13 @@ static void __devinit init_intel(struct cpuinfo_x86 *c)
         }
 #endif
 
-        if (c->x86 == 15) 
+        if (c->x86 == 15)
                 set_bit(X86_FEATURE_P4, c->x86_capability);
         if (c->x86 == 6) 
                 set_bit(X86_FEATURE_P3, c->x86_capability);
+        if ((c->x86 == 0xf && c->x86_model >= 0x03) ||
+                (c->x86 == 0x6 && c->x86_model >= 0x0e))
+                set_bit(X86_FEATURE_CONSTANT_TSC, c->x86_capability);
 }
 
 
diff --git a/arch/i386/kernel/cpu/proc.c b/arch/i386/kernel/cpu/proc.c
index 6d91b274589c..66592fad2bfe 100644
--- a/arch/i386/kernel/cpu/proc.c
+++ b/arch/i386/kernel/cpu/proc.c
@@ -40,7 +40,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
                 /* Other (Linux-defined) */
                 "cxmmx", "k6_mtrr", "cyrix_arr", "centaur_mcr",
                 NULL, NULL, NULL, NULL,
-                NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+                "constant_tsc", NULL, NULL, NULL, NULL, NULL, NULL, NULL,
                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,