mm: bdi init hooks

provide BDI constructor/destructor hooks

[akpm@linux-foundation.org: compile fix]
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 8 insertions, 1 deletions

diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 04598e12c489..0d9a2055ddee 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -974,11 +974,15 @@ static int __init init_hugetlbfs_fs(void)
         int error;
         struct vfsmount *vfsmount;
 
+        error = bdi_init(&hugetlbfs_backing_dev_info);
+        if (error)
+                return error;
+
         hugetlbfs_inode_cachep = kmem_cache_create("hugetlbfs_inode_cache",
                                         sizeof(struct hugetlbfs_inode_info),
                                         0, 0, init_once);
         if (hugetlbfs_inode_cachep == NULL)
-                return -ENOMEM;
+                goto out2;
 
         error = register_filesystem(&hugetlbfs_fs_type);
         if (error)
@@ -996,6 +1000,8 @@ static int __init init_hugetlbfs_fs(void)
  out:
         if (error)
                 kmem_cache_destroy(hugetlbfs_inode_cachep);
+ out2:
+        bdi_destroy(&hugetlbfs_backing_dev_info);
         return error;
 }
 
@@ -1003,6 +1009,7 @@ static void __exit exit_hugetlbfs_fs(void)
 {
         kmem_cache_destroy(hugetlbfs_inode_cachep);
         unregister_filesystem(&hugetlbfs_fs_type);
+        bdi_destroy(&hugetlbfs_backing_dev_info);
 }
 
 module_init(init_hugetlbfs_fs)