diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 3c20de1..f6f020b 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -977,6 +977,21 @@ struct ext4_inode_info {
 #define EXT4_MOUNT2_EXPLICIT_DELALLOC	0x00000001 /* User explicitly
 						      specified delalloc */
 
+#define EXT4_MOUNT_INCOMPAT_EXT3	(EXT4_MOUNT_JOURNAL_CHECKSUM |		\
+					 EXT4_MOUNT_JOURNAL_ASYNC_COMMIT |	\
+					 EXT4_MOUNT_DELALLOC |			\
+					 EXT4_MOUNT_DISCARD |			\
+					 EXT4_MOUNT_BLOCK_VALIDITY |		\
+					 EXT4_MOUNT_DATA_ERR_ABORT |		\
+					 EXT4_MOUNT_DIOREAD_NOLOCK)
+
+#define EXT4_MOUNT_INCOMPAT_EXT2	(EXT4_MOUNT_INCOMPAT_EXT3 |		\
+					 EXT4_MOUNT_NOLOAD |			\
+					 EXT4_MOUNT_JOURNAL_DATA |		\
+					 EXT4_MOUNT_WRITEBACK_DATA |		\
+					 EXT4_MOUNT_UPDATE_JOURNAL |		\
+					 EXT4_MOUNT_ORDERED_DATA)
+
 #define clear_opt(sb, opt)		EXT4_SB(sb)->s_mount_opt &= \
 						~EXT4_MOUNT_##opt
 #define set_opt(sb, opt)		EXT4_SB(sb)->s_mount_opt |= \
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 80928f7..93f7a80 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -83,6 +83,8 @@ static int ext4_feature_set_ok(struct super_block *sb, int readonly);
 static void ext4_destroy_lazyinit_thread(void);
 static void ext4_unregister_li_request(struct super_block *sb);
 static void ext4_clear_request_list(void);
+static inline void check_ext3_incompat_mount(struct super_block *sb);
+static inline void check_ext2_incompat_mount(struct super_block *sb);
 
 #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23)
 static struct file_system_type ext2_fs_type = {
@@ -3475,6 +3477,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 				 "to feature incompatibilities");
 			goto failed_mount;
 		}
+		check_ext2_incompat_mount(sb);
 	}
 
 	if (IS_EXT3_SB(sb)) {
@@ -3486,6 +3489,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 				 "to feature incompatibilities");
 			goto failed_mount;
 		}
+		check_ext3_incompat_mount(sb);
 	}
 
 	/*
@@ -5192,6 +5196,22 @@ static inline int ext2_feature_set_ok(struct super_block *sb)
 		return 0;
 	return 1;
 }
+
+static inline void check_ext3_incompat_mount(struct super_block *sb)
+{
+	if (test_opt(sb, INCOMPAT_EXT3))
+		printk(KERN_WARNING
+			"EXT4-fs: Mount options incompatible with ext3\n");
+
+}
+
+static inline void check_ext2_incompat_mount(struct super_block *sb)
+{
+	if (test_opt(sb, INCOMPAT_EXT2))
+		printk(KERN_WARNING
+			"EXT4-fs: Mount options incompatible with ext2\n");
+}
+
 MODULE_ALIAS("ext2");
 #else
 static inline void register_as_ext2(void) { }