net: Add init_dummy_netdev() and fix EMAC driver using it

[deliverable/linux.git] / kernel / sched.c

diff --git a/kernel/sched.c b/kernel/sched.c
index 545c6fccd1dc7ceba0e33e33250fc38369a41fab..8be2c13b50d018cc69280829e14e31612d4deddd 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -125,6 +125,9 @@ DEFINE_TRACE(sched_switch);
 DEFINE_TRACE(sched_migrate_task);
 
 #ifdef CONFIG_SMP
+
+static void double_rq_lock(struct rq *rq1, struct rq *rq2);
+
 /*
  * Divide a load by a sched group cpu_power : (load / sg->__cpu_power)
  * Since cpu_power is a 'constant', we can use a reciprocal divide.
@@ -3728,8 +3731,13 @@ redo:
                }
 
                double_unlock_balance(this_rq, busiest);
+               /*
+                * Should not call ttwu while holding a rq->lock
+                */
+               spin_unlock(&this_rq->lock);
                if (active_balance)
                        wake_up_process(busiest->migration_thread);
+               spin_lock(&this_rq->lock);
 
        } else
                sd->nr_balance_failed = 0;
@@ -6957,7 +6965,7 @@ static void rq_attach_root(struct rq *rq, struct root_domain *rd)
        spin_unlock_irqrestore(&rq->lock, flags);
 }
 
-static int init_rootdomain(struct root_domain *rd, bool bootmem)
+static int __init_refok init_rootdomain(struct root_domain *rd, bool bootmem)
 {
        memset(rd, 0, sizeof(*rd));
 
@@ -6970,7 +6978,7 @@ static int init_rootdomain(struct root_domain *rd, bool bootmem)
        }
 
        if (!alloc_cpumask_var(&rd->span, GFP_KERNEL))
-               goto free_rd;
+               goto out;
        if (!alloc_cpumask_var(&rd->online, GFP_KERNEL))
                goto free_span;
        if (!alloc_cpumask_var(&rd->rto_mask, GFP_KERNEL))
@@ -6986,8 +6994,7 @@ free_online:
        free_cpumask_var(rd->online);
 free_span:
        free_cpumask_var(rd->span);
-free_rd:
-       kfree(rd);
+out:
        return -ENOMEM;
 }
 
@@ -7278,10 +7285,10 @@ cpu_to_phys_group(int cpu, const struct cpumask *cpu_map,
  * groups, so roll our own. Now each node has its own list of groups which
  * gets dynamically allocated.
  */
-static DEFINE_PER_CPU(struct sched_domain, node_domains);
+static DEFINE_PER_CPU(struct static_sched_domain, node_domains);
 static struct sched_group ***sched_group_nodes_bycpu;
 
-static DEFINE_PER_CPU(struct sched_domain, allnodes_domains);
+static DEFINE_PER_CPU(struct static_sched_domain, allnodes_domains);
 static DEFINE_PER_CPU(struct static_sched_group, sched_group_allnodes);
 
 static int cpu_to_allnodes_group(int cpu, const struct cpumask *cpu_map,
@@ -7556,7 +7563,7 @@ static int __build_sched_domains(const struct cpumask *cpu_map,
 #ifdef CONFIG_NUMA
                if (cpumask_weight(cpu_map) >
                                SD_NODES_PER_DOMAIN*cpumask_weight(nodemask)) {
-                       sd = &per_cpu(allnodes_domains, i);
+                       sd = &per_cpu(allnodes_domains, i).sd;
                        SD_INIT(sd, ALLNODES);
                        set_domain_attribute(sd, attr);
                        cpumask_copy(sched_domain_span(sd), cpu_map);
@@ -7566,7 +7573,7 @@ static int __build_sched_domains(const struct cpumask *cpu_map,
                } else
                        p = NULL;
 
-               sd = &per_cpu(node_domains, i);
+               sd = &per_cpu(node_domains, i).sd;
                SD_INIT(sd, NODE);
                set_domain_attribute(sd, attr);
                sched_domain_node_span(cpu_to_node(i), sched_domain_span(sd));
@@ -7684,7 +7691,7 @@ static int __build_sched_domains(const struct cpumask *cpu_map,
                for_each_cpu(j, nodemask) {
                        struct sched_domain *sd;
 
-                       sd = &per_cpu(node_domains, j);
+                       sd = &per_cpu(node_domains, j).sd;
                        sd->groups = sg;
                }
                sg->__cpu_power = 0;
@@ -7987,7 +7994,7 @@ match2:
 }
 
 #if defined(CONFIG_SCHED_MC) || defined(CONFIG_SCHED_SMT)
-int arch_reinit_sched_domains(void)
+static void arch_reinit_sched_domains(void)
 {
        get_online_cpus();
 
@@ -7996,13 +8003,10 @@ int arch_reinit_sched_domains(void)
 
        rebuild_sched_domains();
        put_online_cpus();
-
-       return 0;
 }
 
 static ssize_t sched_power_savings_store(const char *buf, size_t count, int smt)
 {
-       int ret;
        unsigned int level = 0;
 
        if (sscanf(buf, "%u", &level) != 1)
@@ -8023,9 +8027,9 @@ static ssize_t sched_power_savings_store(const char *buf, size_t count, int smt)
        else
                sched_mc_power_savings = level;
 
-       ret = arch_reinit_sched_domains();
+       arch_reinit_sched_domains();
 
-       return ret ? ret : count;
+       return count;
 }
 
 #ifdef CONFIG_SCHED_MC
@@ -8060,7 +8064,7 @@ static SYSDEV_CLASS_ATTR(sched_smt_power_savings, 0644,
                   sched_smt_power_savings_store);
 #endif
 
-int sched_create_sysfs_power_savings_entries(struct sysdev_class *cls)
+int __init sched_create_sysfs_power_savings_entries(struct sysdev_class *cls)
 {
        int err = 0;