kernfs: use idr instead of ida to manage inode number

kernfs uses ida to manage inode number. The problem is we can't get
kernfs_node from inode number with ida. Switching to use idr, next patch
will add an API to get kernfs_node from inode number.

Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h
index a9b11b8d06f2..5f5d602eb433 100644
--- a/include/linux/kernfs.h
+++ b/include/linux/kernfs.h
@@ -163,7 +163,7 @@ struct kernfs_root {
         unsigned int            flags;  /* KERNFS_ROOT_* flags */
 
         /* private fields, do not use outside kernfs proper */
-        struct ida              ino_ida;
+        struct idr              ino_idr;
         struct kernfs_syscall_ops *syscall_ops;
 
         /* list of kernfs_super_info of this root, protected by kernfs_mutex */