Merge branch 'akpm' (Andrew's patch-bomb)

Merge first batch of patches from Andrew Morton:
 "A few misc things and all the MM queue"

* emailed from Andrew Morton <akpm@linux-foundation.org>: (92 commits)
  memcg: avoid THP split in task migration
  thp: add HPAGE_PMD_* definitions for !CONFIG_TRANSPARENT_HUGEPAGE
  memcg: clean up existing move charge code
  mm/memcontrol.c: remove unnecessary 'break' in mem_cgroup_read()
  mm/memcontrol.c: remove redundant BUG_ON() in mem_cgroup_usage_unregister_event()
  mm/memcontrol.c: s/stealed/stolen/
  memcg: fix performance of mem_cgroup_begin_update_page_stat()
  memcg: remove PCG_FILE_MAPPED
  memcg: use new logic for page stat accounting
  memcg: remove PCG_MOVE_LOCK flag from page_cgroup
  memcg: simplify move_account() check
  memcg: remove EXPORT_SYMBOL(mem_cgroup_update_page_stat)
  memcg: kill dead prev_priority stubs
  memcg: remove PCG_CACHE page_cgroup flag
  memcg: let css_get_next() rely upon rcu_read_lock()
  cgroup: revert ss_id_lock to spinlock
  idr: make idr_get_next() good for rcu_read_lock()
  memcg: remove unnecessary thp check in page stat accounting
  memcg: remove redundant returns
  memcg: enum lru_list lru
  ...

1 files changed, 19 insertions, 3 deletions

diff --git a/kernel/fork.c b/kernel/fork.c
index 26a7138bb849..37674ec55cde 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -512,6 +512,23 @@ static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p)
         return NULL;
 }
 
+static void check_mm(struct mm_struct *mm)
+{
+        int i;
+
+        for (i = 0; i < NR_MM_COUNTERS; i++) {
+                long x = atomic_long_read(&mm->rss_stat.count[i]);
+
+                if (unlikely(x))
+                        printk(KERN_ALERT "BUG: Bad rss-counter state "
+                                          "mm:%p idx:%d val:%ld\n", mm, i, x);
+        }
+
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+        VM_BUG_ON(mm->pmd_huge_pte);
+#endif
+}
+
 /*
  * Allocate and initialize an mm_struct.
  */
@@ -539,9 +556,7 @@ void __mmdrop(struct mm_struct *mm)
         mm_free_pgd(mm);
         destroy_context(mm);
         mmu_notifier_mm_destroy(mm);
-#ifdef CONFIG_TRANSPARENT_HUGEPAGE
-        VM_BUG_ON(mm->pmd_huge_pte);
-#endif
+        check_mm(mm);
         free_mm(mm);
 }
 EXPORT_SYMBOL_GPL(__mmdrop);
@@ -1223,6 +1238,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
 #ifdef CONFIG_CPUSETS
         p->cpuset_mem_spread_rotor = NUMA_NO_NODE;
         p->cpuset_slab_spread_rotor = NUMA_NO_NODE;
+        seqcount_init(&p->mems_allowed_seq);
 #endif
 #ifdef CONFIG_TRACE_IRQFLAGS
         p->irq_events = 0;