Merge branch 'akpm' (patches from Andrew)

Merge second set of updates from Andrew Morton:
 "More of MM"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (83 commits)
  mm/nommu.c: fix arithmetic overflow in __vm_enough_memory()
  mm/mmap.c: fix arithmetic overflow in __vm_enough_memory()
  vmstat: Reduce time interval to stat update on idle cpu
  mm/page_owner.c: remove unnecessary stack_trace field
  Documentation/filesystems/proc.txt: describe /proc/<pid>/map_files
  mm: incorporate read-only pages into transparent huge pages
  vmstat: do not use deferrable delayed work for vmstat_update
  mm: more aggressive page stealing for UNMOVABLE allocations
  mm: always steal split buddies in fallback allocations
  mm: when stealing freepages, also take pages created by splitting buddy page
  mincore: apply page table walker on do_mincore()
  mm: /proc/pid/clear_refs: avoid split_huge_page()
  mm: pagewalk: fix misbehavior of walk_page_range for vma(VM_PFNMAP)
  mempolicy: apply page table walker on queue_pages_range()
  arch/powerpc/mm/subpage-prot.c: use walk->vma and walk_page_vma()
  memcg: cleanup preparation for page table walk
  numa_maps: remove numa_maps->vma
  numa_maps: fix typo in gather_hugetbl_stats
  pagemap: use walk->vma instead of calling find_vma()
  clear_refs: remove clear_refs_private->vma and introduce clear_refs_test_walk()
  ...

1 files changed, 8 insertions, 9 deletions

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 6f43352..6a73e47 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -2168,9 +2168,12 @@ EXPORT_SYMBOL(account_page_redirty);
  */
 int redirty_page_for_writepage(struct writeback_control *wbc, struct page *page)
 {
+	int ret;
+
 	wbc->pages_skipped++;
+	ret = __set_page_dirty_nobuffers(page);
 	account_page_redirty(page);
-	return __set_page_dirty_nobuffers(page);
+	return ret;
 }
 EXPORT_SYMBOL(redirty_page_for_writepage);
 
@@ -2308,12 +2311,10 @@ EXPORT_SYMBOL(clear_page_dirty_for_io);
 int test_clear_page_writeback(struct page *page)
 {
 	struct address_space *mapping = page_mapping(page);
-	unsigned long memcg_flags;
 	struct mem_cgroup *memcg;
-	bool locked;
 	int ret;
 
-	memcg = mem_cgroup_begin_page_stat(page, &locked, &memcg_flags);
+	memcg = mem_cgroup_begin_page_stat(page);
 	if (mapping) {
 		struct backing_dev_info *bdi = mapping->backing_dev_info;
 		unsigned long flags;
@@ -2338,19 +2339,17 @@ int test_clear_page_writeback(struct page *page)
 		dec_zone_page_state(page, NR_WRITEBACK);
 		inc_zone_page_state(page, NR_WRITTEN);
 	}
-	mem_cgroup_end_page_stat(memcg, &locked, &memcg_flags);
+	mem_cgroup_end_page_stat(memcg);
 	return ret;
 }
 
 int __test_set_page_writeback(struct page *page, bool keep_write)
 {
 	struct address_space *mapping = page_mapping(page);
-	unsigned long memcg_flags;
 	struct mem_cgroup *memcg;
-	bool locked;
 	int ret;
 
-	memcg = mem_cgroup_begin_page_stat(page, &locked, &memcg_flags);
+	memcg = mem_cgroup_begin_page_stat(page);
 	if (mapping) {
 		struct backing_dev_info *bdi = mapping->backing_dev_info;
 		unsigned long flags;
@@ -2380,7 +2379,7 @@ int __test_set_page_writeback(struct page *page, bool keep_write)
 		mem_cgroup_inc_page_stat(memcg, MEM_CGROUP_STAT_WRITEBACK);
 		inc_zone_page_state(page, NR_WRITEBACK);
 	}
-	mem_cgroup_end_page_stat(memcg, &locked, &memcg_flags);
+	mem_cgroup_end_page_stat(memcg);
 	return ret;
 
 }