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, 11 insertions, 1 deletions

diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c
index ef2b46d099f..8428d5b2711 100644
--- a/fs/ramfs/inode.c
+++ b/fs/ramfs/inode.c
@@ -223,7 +223,17 @@ module_exit(exit_ramfs_fs)
 
 int __init init_rootfs(void)
 {
-        return register_filesystem(&rootfs_fs_type);
+        int err;
+
+        err = bdi_init(&ramfs_backing_dev_info);
+        if (err)
+                return err;
+
+        err = register_filesystem(&rootfs_fs_type);
+        if (err)
+                bdi_destroy(&ramfs_backing_dev_info);
+
+        return err;
 }
 
 MODULE_LICENSE("GPL");