btrfs: create example debugfs file only in debugging build
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index 804bd1c..e498a47 100644
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -836,9 +836,18 @@
if (!btrfs_debugfs_root_dentry)
return -ENOMEM;
+ /*
+ * Example code, how to export data through debugfs.
+ *
+ * file: /sys/kernel/debug/btrfs/test
+ * contents of: btrfs_debugfs_test
+ */
+#ifdef CONFIG_BTRFS_DEBUG
debugfs_create_u64("test", S_IRUGO | S_IWUSR, btrfs_debugfs_root_dentry,
&btrfs_debugfs_test);
#endif
+
+#endif
return 0;
}
