10 files changed, 64 insertions, 56 deletions

diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 615ce97c6cfd..f1a73f0b54e7 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -352,13 +352,10 @@ handle_level_irq(unsigned int irq, struct irq_desc *desc)
          * keep it masked and get out of here
          */
         action = desc->action;
-        if (unlikely(!action || (desc->status & IRQ_DISABLED))) {
-                desc->status |= IRQ_PENDING;
+        if (unlikely(!action || (desc->status & IRQ_DISABLED)))
                 goto out_unlock;
-        }
 
         desc->status |= IRQ_INPROGRESS;
-        desc->status &= ~IRQ_PENDING;
         spin_unlock(&desc->lock);
 
         action_ret = handle_IRQ_event(irq, action);
diff --git a/kernel/irq/resend.c b/kernel/irq/resend.c
index 5bfeaed7e487..a8046791ba2d 100644
--- a/kernel/irq/resend.c
+++ b/kernel/irq/resend.c
@@ -62,7 +62,12 @@ void check_irq_resend(struct irq_desc *desc, unsigned int irq)
          */
         desc->chip->enable(irq);
 
-        if ((status & (IRQ_PENDING | IRQ_REPLAY)) == IRQ_PENDING) {
+        /*
+         * We do not resend level type interrupts. Level type
+         * interrupts are resent by hardware when they are still
+         * active.
+         */
+        if ((status & (IRQ_LEVEL | IRQ_PENDING | IRQ_REPLAY)) == IRQ_PENDING) {
                 desc->status = (status & ~IRQ_PENDING) | IRQ_REPLAY;
 
                 if (!desc->chip || !desc->chip->retrigger ||
diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 3e9f513a728d..4b8a4493c541 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -1063,6 +1063,11 @@ EXPORT_SYMBOL_GPL(register_kprobe);
 EXPORT_SYMBOL_GPL(unregister_kprobe);
 EXPORT_SYMBOL_GPL(register_jprobe);
 EXPORT_SYMBOL_GPL(unregister_jprobe);
+#ifdef CONFIG_KPROBES
 EXPORT_SYMBOL_GPL(jprobe_return);
+#endif
+
+#ifdef CONFIG_KPROBES
 EXPORT_SYMBOL_GPL(register_kretprobe);
 EXPORT_SYMBOL_GPL(unregister_kretprobe);
+#endif
diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c
index a3b7854b8f7c..a686590d88c1 100644
--- a/kernel/power/snapshot.c
+++ b/kernel/power/snapshot.c
@@ -709,7 +709,8 @@ static void mark_nosave_pages(struct memory_bitmap *bm)
                                 region->end_pfn << PAGE_SHIFT);
 
                 for (pfn = region->start_pfn; pfn < region->end_pfn; pfn++)
-                        memory_bm_set_bit(bm, pfn);
+                        if (pfn_valid(pfn))
+                                memory_bm_set_bit(bm, pfn);
         }
 }
 
diff --git a/kernel/profile.c b/kernel/profile.c
index 5b20fe977bed..cb1e37d2dac3 100644
--- a/kernel/profile.c
+++ b/kernel/profile.c
@@ -199,11 +199,11 @@ EXPORT_SYMBOL_GPL(register_timer_hook);
 EXPORT_SYMBOL_GPL(unregister_timer_hook);
 EXPORT_SYMBOL_GPL(task_handoff_register);
 EXPORT_SYMBOL_GPL(task_handoff_unregister);
+EXPORT_SYMBOL_GPL(profile_event_register);
+EXPORT_SYMBOL_GPL(profile_event_unregister);
 
 #endif /* CONFIG_PROFILING */
 
-EXPORT_SYMBOL_GPL(profile_event_register);
-EXPORT_SYMBOL_GPL(profile_event_unregister);
 
 #ifdef CONFIG_SMP
 /*
diff --git a/kernel/sched.c b/kernel/sched.c
index b0afd8db1396..45e17b83b7f1 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -263,6 +263,7 @@ struct rq {
 
         unsigned int clock_warps, clock_overflows;
         unsigned int clock_unstable_events;
+        u64 tick_timestamp;
 
         atomic_t nr_iowait;
 
@@ -341,8 +342,11 @@ static void __update_rq_clock(struct rq *rq)
                 /*
                  * Catch too large forward jumps too:
                  */
-                if (unlikely(delta > 2*TICK_NSEC)) {
-                        clock++;
+                if (unlikely(clock + delta > rq->tick_timestamp + TICK_NSEC)) {
+                        if (clock < rq->tick_timestamp + TICK_NSEC)
+                                clock = rq->tick_timestamp + TICK_NSEC;
+                        else
+                                clock++;
                         rq->clock_overflows++;
                 } else {
                         if (unlikely(delta > rq->clock_max_delta))
@@ -3102,7 +3106,7 @@ static void run_rebalance_domains(struct softirq_action *h)
                         if (need_resched())
                                 break;
 
-                        rebalance_domains(balance_cpu, SCHED_IDLE);
+                        rebalance_domains(balance_cpu, CPU_IDLE);
 
                         rq = cpu_rq(balance_cpu);
                         if (time_after(this_rq->next_balance, rq->next_balance))
@@ -3308,9 +3312,16 @@ void scheduler_tick(void)
         int cpu = smp_processor_id();
         struct rq *rq = cpu_rq(cpu);
         struct task_struct *curr = rq->curr;
+        u64 next_tick = rq->tick_timestamp + TICK_NSEC;
 
         spin_lock(&rq->lock);
         __update_rq_clock(rq);
+        /*
+         * Let rq->clock advance by at least TICK_NSEC:
+         */
+        if (unlikely(rq->clock < next_tick))
+                rq->clock = next_tick;
+        rq->tick_timestamp = rq->clock;
         update_cpu_load(rq);
         if (curr != rq->idle) /* FIXME: needed? */
                 curr->sched_class->task_tick(rq, curr);
@@ -6317,7 +6328,7 @@ int partition_sched_domains(cpumask_t *partition1, cpumask_t *partition2)
 }
 
 #if defined(CONFIG_SCHED_MC) || defined(CONFIG_SCHED_SMT)
-int arch_reinit_sched_domains(void)
+static int arch_reinit_sched_domains(void)
 {
         int err;
 
@@ -6346,24 +6357,6 @@ static ssize_t sched_power_savings_store(const char *buf, size_t count, int smt)
         return ret ? ret : count;
 }
 
-int sched_create_sysfs_power_savings_entries(struct sysdev_class *cls)
-{
-        int err = 0;
-
-#ifdef CONFIG_SCHED_SMT
-        if (smt_capable())
-                err = sysfs_create_file(&cls->kset.kobj,
-                                        &attr_sched_smt_power_savings.attr);
-#endif
-#ifdef CONFIG_SCHED_MC
-        if (!err && mc_capable())
-                err = sysfs_create_file(&cls->kset.kobj,
-                                        &attr_sched_mc_power_savings.attr);
-#endif
-        return err;
-}
-#endif
-
 #ifdef CONFIG_SCHED_MC
 static ssize_t sched_mc_power_savings_show(struct sys_device *dev, char *page)
 {
@@ -6374,8 +6367,8 @@ static ssize_t sched_mc_power_savings_store(struct sys_device *dev,
 {
         return sched_power_savings_store(buf, count, 0);
 }
-SYSDEV_ATTR(sched_mc_power_savings, 0644, sched_mc_power_savings_show,
-            sched_mc_power_savings_store);
+static SYSDEV_ATTR(sched_mc_power_savings, 0644, sched_mc_power_savings_show,
+                   sched_mc_power_savings_store);
 #endif
 
 #ifdef CONFIG_SCHED_SMT
@@ -6388,8 +6381,26 @@ static ssize_t sched_smt_power_savings_store(struct sys_device *dev,
 {
         return sched_power_savings_store(buf, count, 1);
 }
-SYSDEV_ATTR(sched_smt_power_savings, 0644, sched_smt_power_savings_show,
-            sched_smt_power_savings_store);
+static SYSDEV_ATTR(sched_smt_power_savings, 0644, sched_smt_power_savings_show,
+                   sched_smt_power_savings_store);
+#endif
+
+int sched_create_sysfs_power_savings_entries(struct sysdev_class *cls)
+{
+        int err = 0;
+
+#ifdef CONFIG_SCHED_SMT
+        if (smt_capable())
+                err = sysfs_create_file(&cls->kset.kobj,
+                                        &attr_sched_smt_power_savings.attr);
+#endif
+#ifdef CONFIG_SCHED_MC
+        if (!err && mc_capable())
+                err = sysfs_create_file(&cls->kset.kobj,
+                                        &attr_sched_mc_power_savings.attr);
+#endif
+        return err;
+}
 #endif
 
 /*
diff --git a/kernel/sched_debug.c b/kernel/sched_debug.c
index 3da32156394e..87e524762b85 100644
--- a/kernel/sched_debug.c
+++ b/kernel/sched_debug.c
@@ -108,7 +108,7 @@ print_cfs_rq_runtime_sum(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
 
 void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
 {
-        SEQ_printf(m, "\ncfs_rq %p\n", cfs_rq);
+        SEQ_printf(m, "\ncfs_rq\n");
 
 #define P(x) \
         SEQ_printf(m, "  .%-30s: %Ld\n", #x, (long long)(cfs_rq->x))
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index e91db32cadfd..fedbb51bba96 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -75,7 +75,7 @@ enum {
 
 unsigned int sysctl_sched_features __read_mostly =
                 SCHED_FEAT_FAIR_SLEEPERS        *1 |
-                SCHED_FEAT_SLEEPER_AVG          *1 |
+                SCHED_FEAT_SLEEPER_AVG          *0 |
                 SCHED_FEAT_SLEEPER_LOAD_AVG     *1 |
                 SCHED_FEAT_PRECISE_CPU_LOAD     *1 |
                 SCHED_FEAT_START_DEBIT          *1 |
@@ -304,11 +304,9 @@ __update_curr(struct cfs_rq *cfs_rq, struct sched_entity *curr)
         delta_mine = calc_delta_mine(delta_exec, curr->load.weight, lw);
 
         if (cfs_rq->sleeper_bonus > sysctl_sched_granularity) {
-                delta = calc_delta_mine(cfs_rq->sleeper_bonus,
-                                        curr->load.weight, lw);
-                if (unlikely(delta > cfs_rq->sleeper_bonus))
-                        delta = cfs_rq->sleeper_bonus;
-
+                delta = min(cfs_rq->sleeper_bonus, (u64)delta_exec);
+                delta = calc_delta_mine(delta, curr->load.weight, lw);
+                delta = min((u64)delta, cfs_rq->sleeper_bonus);
                 cfs_rq->sleeper_bonus -= delta;
                 delta_mine -= delta;
         }
@@ -521,6 +519,8 @@ static void __enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se)
          * Track the amount of bonus we've given to sleepers:
          */
         cfs_rq->sleeper_bonus += delta_fair;
+        if (unlikely(cfs_rq->sleeper_bonus > sysctl_sched_runtime_limit))
+                cfs_rq->sleeper_bonus = sysctl_sched_runtime_limit;
 
         schedstat_add(cfs_rq, wait_runtime, se->wait_runtime);
 }
@@ -959,13 +959,12 @@ load_balance_fair(struct rq *this_rq, int this_cpu, struct rq *busiest,
         for_each_leaf_cfs_rq(busiest, busy_cfs_rq) {
 #ifdef CONFIG_FAIR_GROUP_SCHED
                 struct cfs_rq *this_cfs_rq;
-                long imbalances;
+                long imbalance;
                 unsigned long maxload;
 
                 this_cfs_rq = cpu_cfs_rq(busy_cfs_rq, this_cpu);
 
-                imbalance = busy_cfs_rq->load.weight -
-                                                 this_cfs_rq->load.weight;
+                imbalance = busy_cfs_rq->load.weight - this_cfs_rq->load.weight;
                 /* Don't pull if this_cfs_rq has more load than busy_cfs_rq */
                 if (imbalance <= 0)
                         continue;
@@ -976,7 +975,7 @@ load_balance_fair(struct rq *this_rq, int this_cpu, struct rq *busiest,
 
                 *this_best_prio = cfs_rq_best_prio(this_cfs_rq);
 #else
-#define maxload rem_load_move
+# define maxload rem_load_move
 #endif
                 /* pass busy_cfs_rq argument into
                  * load_balance_[start|next]_fair iterators
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 79c891e6266c..8bdb8c07e04f 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1023,6 +1023,7 @@ static ctl_table vm_table[] = {
                 .mode           = 0644,
                 .proc_handler   = &proc_doulongvec_minmax,
         },
+#endif
 #ifdef CONFIG_NUMA
         {
                 .ctl_name       = CTL_UNNUMBERED,
@@ -1034,7 +1035,6 @@ static ctl_table vm_table[] = {
                 .strategy       = &sysctl_string,
         },
 #endif
-#endif
 #if defined(CONFIG_X86_32) || \
    (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL))
         {
diff --git a/kernel/time/clockevents.c b/kernel/time/clockevents.c
index 2ad1c37b8dfe..41dd3105ce7f 100644
--- a/kernel/time/clockevents.c
+++ b/kernel/time/clockevents.c
@@ -113,16 +113,6 @@ int clockevents_register_notifier(struct notifier_block *nb)
         return ret;
 }
 
-/**
- * clockevents_unregister_notifier - unregister a clock events change listener
- */
-void clockevents_unregister_notifier(struct notifier_block *nb)
-{
-        spin_lock(&clockevents_lock);
-        raw_notifier_chain_unregister(&clockevents_chain, nb);
-        spin_unlock(&clockevents_lock);
-}
-
 /*
  * Notify about a clock event change. Called with clockevents_lock
  * held.