+ /* Mount the volume RO if we encounter unsupported ro_compat features */
+ if (FlagOn(sb->s_feature_ro_compat, ~EXT4_FEATURE_RO_COMPAT_SUPP)) {
+ SetLongFlag(Vcb->Flags, VCB_RO_COMPAT_READ_ONLY);
+ }
+
+ /* Recognize the filesystem as Ext3fs if it supports journalling */
+ if (IsFlagOn(sb->s_feature_compat, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) {
+ Vcb->IsExt3fs = TRUE;
+ }
+