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

Merge Andrew's second set of patches:
 - MM
 - a few random fixes
 - a couple of RTC leftovers

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (120 commits)
  rtc/rtc-88pm80x: remove unneed devm_kfree
  rtc/rtc-88pm80x: assign ret only when rtc_register_driver fails
  mm: hugetlbfs: close race during teardown of hugetlbfs shared page tables
  tmpfs: distribute interleave better across nodes
  mm: remove redundant initialization
  mm: warn if pg_data_t isn't initialized with zero
  mips: zero out pg_data_t when it's allocated
  memcg: gix memory accounting scalability in shrink_page_list
  mm/sparse: remove index_init_lock
  mm/sparse: more checks on mem_section number
  mm/sparse: optimize sparse_index_alloc
  memcg: add mem_cgroup_from_css() helper
  memcg: further prevent OOM with too many dirty pages
  memcg: prevent OOM with too many dirty pages
  mm: mmu_notifier: fix freed page still mapped in secondary MMU
  mm: memcg: only check anon swapin page charges for swap cache
  mm: memcg: only check swap cache pages for repeated charging
  mm: memcg: split swapin charge function into private and public part
  mm: memcg: remove needless !mm fixup to init_mm when charging
  mm: memcg: remove unneeded shmem charge type
  ...

5 files changed, 16 insertions, 11 deletions

diff --git a/kernel/cpu.c b/kernel/cpu.c
index a4eb5227a19e..14d32588cccd 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -416,7 +416,7 @@ int __cpuinit cpu_up(unsigned int cpu)
 
         if (pgdat->node_zonelists->_zonerefs->zone == NULL) {
                 mutex_lock(&zonelists_mutex);
-                build_all_zonelists(NULL);
+                build_all_zonelists(NULL, NULL);
                 mutex_unlock(&zonelists_mutex);
         }
 #endif
diff --git a/kernel/fork.c b/kernel/fork.c
index 8efac1fe56bc..3bd2280d79f6 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -381,10 +381,8 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
                 struct file *file;
 
                 if (mpnt->vm_flags & VM_DONTCOPY) {
-                        long pages = vma_pages(mpnt);
-                        mm->total_vm -= pages;
                         vm_stat_account(mm, mpnt->vm_flags, mpnt->vm_file,
-                                                                -pages);
+                                                        -vma_pages(mpnt));
                         continue;
                 }
                 charge = 0;
@@ -1308,7 +1306,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
 #ifdef CONFIG_DEBUG_MUTEXES
         p->blocked_on = NULL; /* not blocked yet */
 #endif
-#ifdef CONFIG_CGROUP_MEM_RES_CTLR
+#ifdef CONFIG_MEMCG
         p->memcg_batch.do_batch = 0;
         p->memcg_batch.memcg = NULL;
 #endif
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 671f9594e368..b73e681df09e 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -210,6 +210,14 @@ asmlinkage void __do_softirq(void)
         __u32 pending;
         int max_restart = MAX_SOFTIRQ_RESTART;
         int cpu;
+        unsigned long old_flags = current->flags;
+
+        /*
+         * Mask out PF_MEMALLOC s current task context is borrowed for the
+         * softirq. A softirq handled such as network RX might set PF_MEMALLOC
+         * again if the socket is related to swap
+         */
+        current->flags &= ~PF_MEMALLOC;
 
         pending = local_softirq_pending();
         account_system_vtime(current);
@@ -265,6 +273,7 @@ restart:
 
         account_system_vtime(current);
         __local_bh_enable(SOFTIRQ_OFFSET);
+        tsk_restore_flags(current, old_flags, PF_MEMALLOC);
 }
 
 #ifndef __ARCH_HAS_DO_SOFTIRQ
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 97186b99b0e4..6502d35a25ba 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1101,11 +1101,9 @@ static struct ctl_table vm_table[] = {
                 .extra1         = &zero,
         },
         {
-                .procname       = "nr_pdflush_threads",
-                .data           = &nr_pdflush_threads,
-                .maxlen         = sizeof nr_pdflush_threads,
-                .mode           = 0444 /* read-only*/,
-                .proc_handler   = proc_dointvec,
+                .procname       = "nr_pdflush_threads",
+                .mode           = 0444 /* read-only */,
+                .proc_handler   = pdflush_proc_obsolete,
         },
         {
                 .procname       = "swappiness",
diff --git a/kernel/sysctl_binary.c b/kernel/sysctl_binary.c
index a650694883a1..65bdcf198d4e 100644
--- a/kernel/sysctl_binary.c
+++ b/kernel/sysctl_binary.c
@@ -147,7 +147,7 @@ static const struct bin_table bin_vm_table[] = {
         { CTL_INT,      VM_DIRTY_RATIO,                 "dirty_ratio" },
         /* VM_DIRTY_WB_CS "dirty_writeback_centisecs" no longer used */
         /* VM_DIRTY_EXPIRE_CS "dirty_expire_centisecs" no longer used */
-        { CTL_INT,      VM_NR_PDFLUSH_THREADS,          "nr_pdflush_threads" },
+        /* VM_NR_PDFLUSH_THREADS "nr_pdflush_threads" no longer used */
         { CTL_INT,      VM_OVERCOMMIT_RATIO,            "overcommit_ratio" },
         /* VM_PAGEBUF unused */
         /* VM_HUGETLB_PAGES "nr_hugepages" no longer used */