Merge branch 'tip/perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/core

4 files changed, 46 insertions, 8 deletions

diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd.c b/arch/x86/kernel/cpu/mcheck/mce_amd.c
index 224392d8fe8c..5e975298fa81 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_amd.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_amd.c
@@ -530,7 +530,7 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)
                 err = -ENOMEM;
                 goto out;
         }
-        if (!alloc_cpumask_var(&b->cpus, GFP_KERNEL)) {
+        if (!zalloc_cpumask_var(&b->cpus, GFP_KERNEL)) {
                 kfree(b);
                 err = -ENOMEM;
                 goto out;
@@ -543,7 +543,7 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)
 #ifndef CONFIG_SMP
         cpumask_setall(b->cpus);
 #else
-        cpumask_copy(b->cpus, c->llc_shared_map);
+        cpumask_set_cpu(cpu, b->cpus);
 #endif
 
         per_cpu(threshold_banks, cpu)[bank] = b;
diff --git a/arch/x86/kernel/cpu/mcheck/therm_throt.c b/arch/x86/kernel/cpu/mcheck/therm_throt.c
index c2a8b26d4fea..d9368eeda309 100644
--- a/arch/x86/kernel/cpu/mcheck/therm_throt.c
+++ b/arch/x86/kernel/cpu/mcheck/therm_throt.c
@@ -202,10 +202,11 @@ static int therm_throt_process(bool new_event, int event, int level)
 
 #ifdef CONFIG_SYSFS
 /* Add/Remove thermal_throttle interface for CPU device: */
-static __cpuinit int thermal_throttle_add_dev(struct sys_device *sys_dev)
+static __cpuinit int thermal_throttle_add_dev(struct sys_device *sys_dev,
+                                unsigned int cpu)
 {
         int err;
-        struct cpuinfo_x86 *c = &cpu_data(smp_processor_id());
+        struct cpuinfo_x86 *c = &cpu_data(cpu);
 
         err = sysfs_create_group(&sys_dev->kobj, &thermal_attr_group);
         if (err)
@@ -251,7 +252,7 @@ thermal_throttle_cpu_callback(struct notifier_block *nfb,
         case CPU_UP_PREPARE:
         case CPU_UP_PREPARE_FROZEN:
                 mutex_lock(&therm_cpu_lock);
-                err = thermal_throttle_add_dev(sys_dev);
+                err = thermal_throttle_add_dev(sys_dev, cpu);
                 mutex_unlock(&therm_cpu_lock);
                 WARN_ON(err);
                 break;
@@ -287,7 +288,7 @@ static __init int thermal_throttle_init_device(void)
 #endif
         /* connect live CPUs to sysfs */
         for_each_online_cpu(cpu) {
-                err = thermal_throttle_add_dev(get_cpu_sysdev(cpu));
+                err = thermal_throttle_add_dev(get_cpu_sysdev(cpu), cpu);
                 WARN_ON(err);
         }
 #ifdef CONFIG_HOTPLUG_CPU
diff --git a/arch/x86/kernel/trampoline.c b/arch/x86/kernel/trampoline.c
index a874495b3673..e2a595257390 100644
--- a/arch/x86/kernel/trampoline.c
+++ b/arch/x86/kernel/trampoline.c
@@ -45,8 +45,7 @@ void __init setup_trampoline_page_table(void)
         /* Copy kernel address range */
         clone_pgd_range(trampoline_pg_dir + KERNEL_PGD_BOUNDARY,
                         swapper_pg_dir + KERNEL_PGD_BOUNDARY,
-                        min_t(unsigned long, KERNEL_PGD_PTRS,
-                              KERNEL_PGD_BOUNDARY));
+                        KERNEL_PGD_PTRS);
 
         /* Initialize low mappings */
         clone_pgd_range(trampoline_pg_dir,
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index ce8e50239332..26a863a9c2a8 100644
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -626,6 +626,44 @@ static void set_cyc2ns_scale(unsigned long cpu_khz, int cpu)
         local_irq_restore(flags);
 }
 
+static unsigned long long cyc2ns_suspend;
+
+void save_sched_clock_state(void)
+{
+        if (!sched_clock_stable)
+                return;
+
+        cyc2ns_suspend = sched_clock();
+}
+
+/*
+ * Even on processors with invariant TSC, TSC gets reset in some the
+ * ACPI system sleep states. And in some systems BIOS seem to reinit TSC to
+ * arbitrary value (still sync'd across cpu's) during resume from such sleep
+ * states. To cope up with this, recompute the cyc2ns_offset for each cpu so
+ * that sched_clock() continues from the point where it was left off during
+ * suspend.
+ */
+void restore_sched_clock_state(void)
+{
+        unsigned long long offset;
+        unsigned long flags;
+        int cpu;
+
+        if (!sched_clock_stable)
+                return;
+
+        local_irq_save(flags);
+
+        __get_cpu_var(cyc2ns_offset) = 0;
+        offset = cyc2ns_suspend - sched_clock();
+
+        for_each_possible_cpu(cpu)
+                per_cpu(cyc2ns_offset, cpu) = offset;
+
+        local_irq_restore(flags);
+}
+
 #ifdef CONFIG_CPU_FREQ
 
 /* Frequency scaling support. Adjust the TSC based timer when the cpu frequency