ocfs2: temporarily remove extent map caching

The code in extent_map.c is not prepared to deal with a subtree being
rotated between lookups. This can happen when filling holes in sparse files.
Instead of a lengthy patch to update the code (which would likely lose the
benefit of caching subtree roots), we remove most of the algorithms and
implement a simple path based lookup. A less ambitious extent caching scheme
will be added in a later patch.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

1 files changed, 0 insertions, 7 deletions

diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 16564ea6c141..6ab52351943a 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -806,9 +806,6 @@ static int __init ocfs2_init(void)
 
         ocfs2_print_version();
 
-        if (init_ocfs2_extent_maps())
-                return -ENOMEM;
-
         status = init_ocfs2_uptodate_cache();
         if (status < 0) {
                 mlog_errno(status);
@@ -837,7 +834,6 @@ leave:
         if (status < 0) {
                 ocfs2_free_mem_caches();
                 exit_ocfs2_uptodate_cache();
-                exit_ocfs2_extent_maps();
         }
 
         mlog_exit(status);
@@ -863,8 +859,6 @@ static void __exit ocfs2_exit(void)
 
         unregister_filesystem(&ocfs2_fs_type);
 
-        exit_ocfs2_extent_maps();
-
         exit_ocfs2_uptodate_cache();
 
         mlog_exit_void();
@@ -948,7 +942,6 @@ static void ocfs2_inode_init_once(void *data,
                 oi->ip_flags = 0;
                 oi->ip_open_count = 0;
                 spin_lock_init(&oi->ip_lock);
-                ocfs2_extent_map_init(&oi->vfs_inode);
                 INIT_LIST_HEAD(&oi->ip_io_markers);
                 oi->ip_created_trans = 0;
                 oi->ip_last_trans = 0;