1 files changed, 2 insertions, 30 deletions

diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index 90d4ee52cd4..bb22a4435b2 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -664,10 +664,6 @@ int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
         struct btrfs_sector_sum *sector_sum;
         u32 nritems;
         u32 ins_size;
-        char *eb_map;
-        char *eb_token;
-        unsigned long map_len;
-        unsigned long map_start;
         u16 csum_size =
                 btrfs_super_csum_size(&root->fs_info->super_copy);
 
@@ -814,30 +810,9 @@ found:
         item_end = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_csum_item);
         item_end = (struct btrfs_csum_item *)((unsigned char *)item_end +
                                       btrfs_item_size_nr(leaf, path->slots[0]));
-        eb_token = NULL;
 next_sector:
 
-        if (!eb_token ||
-           (unsigned long)item + csum_size >= map_start + map_len) {
-                int err;
-
-                if (eb_token)
-                        unmap_extent_buffer(leaf, eb_token, KM_USER1);
-                eb_token = NULL;
-                err = map_private_extent_buffer(leaf, (unsigned long)item,
-                                                csum_size,
-                                                &eb_token, &eb_map,
-                                                &map_start, &map_len, KM_USER1);
-                if (err)
-                        eb_token = NULL;
-        }
-        if (eb_token) {
-                memcpy(eb_token + ((unsigned long)item & (PAGE_CACHE_SIZE - 1)),
-                       &sector_sum->sum, csum_size);
-        } else {
-                write_extent_buffer(leaf, &sector_sum->sum,
-                                    (unsigned long)item, csum_size);
-        }
+        write_extent_buffer(leaf, &sector_sum->sum, (unsigned long)item, csum_size);
 
         total_bytes += root->sectorsize;
         sector_sum++;
@@ -850,10 +825,7 @@ next_sector:
                         goto next_sector;
                 }
         }
-        if (eb_token) {
-                unmap_extent_buffer(leaf, eb_token, KM_USER1);
-                eb_token = NULL;
-        }
+
         btrfs_mark_buffer_dirty(path->nodes[0]);
         if (total_bytes < sums->len) {
                 btrfs_release_path(path);