2 files changed, 11 insertions, 0 deletions

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index ba41da59e31b..0cee46e01081 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -10,6 +10,7 @@
 #include <linux/swap.h>
 #include <linux/writeback.h>
 #include <linux/pagevec.h>
+#include <linux/cleancache.h>
 #include "extent_io.h"
 #include "extent_map.h"
 #include "compat.h"
@@ -2015,6 +2016,13 @@ static int __extent_read_full_page(struct extent_io_tree *tree,
 
         set_page_extent_mapped(page);
 
+        if (!PageUptodate(page)) {
+                if (cleancache_get_page(page) == 0) {
+                        BUG_ON(blocksize != PAGE_SIZE);
+                        goto out;
+                }
+        }
+
         end = page_end;
         while (1) {
                 lock_extent(tree, start, end, GFP_NOFS);
@@ -2148,6 +2156,7 @@ static int __extent_read_full_page(struct extent_io_tree *tree,
                 cur = cur + iosize;
                 page_offset += iosize;
         }
+out:
         if (!nr) {
                 if (!PageError(page))
                         SetPageUptodate(page);
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 0ac712efcdf2..be4ffa12f3ef 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -39,6 +39,7 @@
 #include <linux/miscdevice.h>
 #include <linux/magic.h>
 #include <linux/slab.h>
+#include <linux/cleancache.h>
 #include "compat.h"
 #include "ctree.h"
 #include "disk-io.h"
@@ -624,6 +625,7 @@ static int btrfs_fill_super(struct super_block *sb,
         sb->s_root = root_dentry;
 
         save_mount_options(sb, data);
+        cleancache_init_fs(sb);
         return 0;
 
 fail_close: