1 files changed, 18 insertions, 0 deletions
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 7fc2f3f07c16..a2420c900275 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -26,6 +26,24 @@
 #include <linux/writeback.h>
 #include "ubifs.h"
 
+static int ubifs_default_version_set(const char *val, const struct kernel_param *kp)
+{
+	int n = 0, ret;
+
+	ret = kstrtoint(val, 10, &n);
+	if (ret != 0 || n < 4 || n > UBIFS_FORMAT_VERSION)
+		return -EINVAL;
+	return param_set_int(val, kp);
+}
+
+static const struct kernel_param_ops ubifs_default_version_ops = {
+	.set = ubifs_default_version_set,
+	.get = param_get_int,
+};
+
+int ubifs_default_version = UBIFS_FORMAT_VERSION;
+module_param_cb(default_version, &ubifs_default_version_ops, &ubifs_default_version, 0600);
+
 /*
  * Maximum amount of memory we may 'kmalloc()' without worrying that we are
  * allocating too much.