LU-17745 llite: fix the umount panic due to BDI unregister

[fs/lustre-release.git] / lustre / llite / llite_lib.c

diff --git a/lustre/llite/llite_lib.c b/lustre/llite/llite_lib.c
index ce2af4e..8babc83 100644 (file)
--- a/lustre/llite/llite_lib.c
+++ b/lustre/llite/llite_lib.c
@@ -1515,16 +1515,12 @@ out_free_cfg:
 
 static void ll_bdi_device_unregister(struct backing_dev_info *bdi)
 {
+#if !defined(HAVE_BDI_DEBUG_STATS) && defined(SB_I_CGROUPWB) && \
+    !defined(SB_I_PERSB_BDI)
        if (bdi->dev == NULL)
                return;
 
-#if defined(SB_I_CGROUPWB) && !defined(SB_I_PERSB_BDI)
-#ifdef HAVE_BDI_DEBUG_STATS
-       debugfs_remove(bdi->debug_stats);
-       debugfs_remove(bdi->debug_dir);
-#else
        debugfs_remove_recursive(bdi->debug_dir);
-#endif
        device_unregister(bdi->dev);
        bdi->dev = NULL;
 #endif