mm: remove page_file_index

After using the offset of the swap entry as the key of the swap cache,
the page_index() becomes exactly same as page_file_index().  So the
page_file_index() is removed and the callers are changed to use
page_index() instead.

Link: http://lkml.kernel.org/r/1473270649-27229-2-git-send-email-ying.huang@intel.com
Signed-off-by: "Huang, Ying" <ying.huang@intel.com>
Cc: Trond Myklebust <trond.myklebust@primarydata.com>
Cc: Anna Schumaker <anna.schumaker@netapp.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 3a6724c6eb5f..53211838f72a 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -151,7 +151,7 @@ static void nfs_grow_file(struct page *page, unsigned int offset, unsigned int c
         spin_lock(&inode->i_lock);
         i_size = i_size_read(inode);
         end_index = (i_size - 1) >> PAGE_SHIFT;
-        if (i_size > 0 && page_file_index(page) < end_index)
+        if (i_size > 0 && page_index(page) < end_index)
                 goto out;
         end = page_file_offset(page) + ((loff_t)offset+count);
         if (i_size >= end)
@@ -603,7 +603,7 @@ static int nfs_do_writepage(struct page *page, struct writeback_control *wbc,
 {
         int ret;
 
-        nfs_pageio_cond_complete(pgio, page_file_index(page));
+        nfs_pageio_cond_complete(pgio, page_index(page));
         ret = nfs_page_async_flush(pgio, page, wbc->sync_mode == WB_SYNC_NONE,
                                    launder);
         if (ret == -EAGAIN) {