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
  ...

1 files changed, 4 insertions, 3 deletions

diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 8865538b26b6..31fdb03225cd 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -554,13 +554,14 @@ void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
 static inline
 unsigned int nfs_page_length(struct page *page)
 {
-        loff_t i_size = i_size_read(page->mapping->host);
+        loff_t i_size = i_size_read(page_file_mapping(page)->host);
 
         if (i_size > 0) {
+                pgoff_t page_index = page_file_index(page);
                 pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT;
-                if (page->index < end_index)
+                if (page_index < end_index)
                         return PAGE_CACHE_SIZE;
-                if (page->index == end_index)
+                if (page_index == end_index)
                         return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1;
         }
         return 0;