Index: linux-3.10.0-123.13.2.el7.x86_64/fs/ext4/ext4.h
===================================================================
--- linux-3.10.0-123.13.2.el7.x86_64.orig/fs/ext4/ext4.h
+++ linux-3.10.0-123.13.2.el7.x86_64/fs/ext4/ext4.h
@@ -1427,6 +1427,8 @@ static inline void ext4_clear_state_flag
 
 #define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime
 
+#define JOURNAL_START_HAS_3ARGS	1
+
 /*
  * Codes for operating systems
  */
@@ -1527,7 +1427,21 @@ static inline void ext4_clear_state_flag

 EXTN_FEATURE_FUNCS(2)
 EXTN_FEATURE_FUNCS(3)
-EXTN_FEATURE_FUNCS(4)
+static inline bool ext4_has_unknown_ext4_compat_features(struct super_block *sb)
+{
+	return ((EXT4_SB(sb)->s_es->s_feature_compat &
+		cpu_to_le32(~EXT4_FEATURE_COMPAT_SUPP)) != 0);
+}
+static inline bool ext4_has_unknown_ext4_ro_compat_features(struct super_block *sb)
+{
+	return ((EXT4_SB(sb)->s_es->s_feature_ro_compat &
+		cpu_to_le32(~EXT4_FEATURE_RO_COMPAT_SUPP)) != 0);
+}
+static inline bool ext4_has_unknown_ext4_incompat_features(struct super_block *sb)
+{
+	return ((EXT4_SB(sb)->s_es->s_feature_incompat &
+		cpu_to_le32(~EXT4_FEATURE_INCOMPAT_SUPP)) != 0);
+}

 static inline bool ext4_has_compat_features(struct super_block *sb)
 {
@@ -2612,6 +2614,11 @@ struct ext4_extent;
 
 extern int ext4_ext_tree_init(handle_t *handle, struct inode *);
 extern int ext4_ext_writepage_trans_blocks(struct inode *, int);
+extern struct buffer_head *ext4_read_inode_bitmap(struct super_block *sb,
+						  ext4_group_t block_group);
+extern struct buffer_head *ext4_append(handle_t *handle,
+				       struct inode *inode,
+				       ext4_lblk_t *block);
 extern int ext4_ext_index_trans_blocks(struct inode *inode, int extents);
 				       int chunk);
 extern int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
Index: linux-3.10.0-123.13.2.el7.x86_64/fs/ext4/namei.c
===================================================================
--- linux-3.10.0-123.13.2.el7.x86_64.orig/fs/ext4/namei.c
+++ linux-3.10.0-123.13.2.el7.x86_64/fs/ext4/namei.c
@@ -48,7 +48,7 @@
 #define NAMEI_RA_BLOCKS  4
 #define NAMEI_RA_SIZE	     (NAMEI_RA_CHUNKS * NAMEI_RA_BLOCKS)
 
-static struct buffer_head *ext4_append(handle_t *handle,
+struct buffer_head *ext4_append(handle_t *handle,
 					struct inode *inode,
 					ext4_lblk_t *block)
 {
@@ -155,6 +155,7 @@ static struct buffer_head *__ext4_read_d
 	}
 	return bh;
 }
+EXPORT_SYMBOL(ext4_append);
 
 #ifndef assert
 #define assert(test) J_ASSERT(test)
@@ -2210,7 +2211,7 @@ out:
  * DIR_NLINK feature is set if 1) nlinks > EXT4_LINK_MAX or 2) nlinks == 2,
  * since this indicates that nlinks count was previously 1.
  */
-static void ext4_inc_count(handle_t *handle, struct inode *inode)
+void ext4_inc_count(handle_t *handle, struct inode *inode)
 {
 	inc_nlink(inode);
 	if (is_dx(inode) && inode->i_nlink > 1) {
@@ -2222,16 +2223,18 @@ static void ext4_inc_count(handle_t *han
 		}
 	}
 }
+EXPORT_SYMBOL(ext4_inc_count);
 
 /*
  * If a directory had nlink == 1, then we should let it be 1. This indicates
  * directory has >EXT4_LINK_MAX subdirs.
  */
-static void ext4_dec_count(handle_t *handle, struct inode *inode)
+void ext4_dec_count(handle_t *handle, struct inode *inode)
 {
 	if (!S_ISDIR(inode->i_mode) || inode->i_nlink > 2)
 		drop_nlink(inode);
 }
+EXPORT_SYMBOL(ext4_dec_count);
 
 
 static int ext4_add_nondir(handle_t *handle,
Index: linux-3.10.0-123.13.2.el7.x86_64/fs/ext4/ialloc.c
===================================================================
--- linux-3.10.0-123.13.2.el7.x86_64.orig/fs/ext4/ialloc.c
+++ linux-3.10.0-123.13.2.el7.x86_64/fs/ext4/ialloc.c
@@ -111,7 +111,7 @@ void ext4_end_bitmap_read(struct buffer_
  *
  * Return buffer_head of bitmap on success or NULL.
  */
-static struct buffer_head *
+struct buffer_head *
 ext4_read_inode_bitmap(struct super_block *sb, ext4_group_t block_group)
 {
 	struct ext4_group_desc *desc;
@@ -191,6 +191,7 @@ verify:
 	set_buffer_verified(bh);
 	return bh;
 }
+EXPORT_SYMBOL(ext4_read_inode_bitmap);
 
 /*
  * NOTE! When we get the inode, we're the only people
Index: linux-3.10.0-123.13.2.el7.x86_64/fs/ext4/inode.c
===================================================================
--- linux-3.10.0-123.13.2.el7.x86_64.orig/fs/ext4/inode.c
+++ linux-3.10.0-123.13.2.el7.x86_64/fs/ext4/inode.c
@@ -5281,3 +5281,17 @@ out:
 	sb_end_pagefault(inode->i_sb);
 	return ret;
 }
+EXPORT_SYMBOL(ext4_map_blocks);
+EXPORT_SYMBOL(ext4_truncate);
+EXPORT_SYMBOL(ext4_iget);
+EXPORT_SYMBOL(ext4_bread);
+EXPORT_SYMBOL(ext4_itable_unused_count);
+EXPORT_SYMBOL(ext4_force_commit);
+EXPORT_SYMBOL(ext4_mark_inode_dirty);
+EXPORT_SYMBOL(ext4_get_group_desc);
+EXPORT_SYMBOL(__ext4_journal_get_write_access);
+EXPORT_SYMBOL(__ext4_journal_start_sb);
+EXPORT_SYMBOL(__ext4_journal_stop);
+EXPORT_SYMBOL(__ext4_handle_dirty_metadata);
+EXPORT_SYMBOL(__ext4_std_error);
+EXPORT_SYMBOL(ext4fs_dirhash);
Index: linux-3.10.0-123.13.2.el7.x86_64/fs/ext4/mballoc.c
===================================================================
--- linux-3.10.0-123.13.2.el7.x86_64.orig/fs/ext4/mballoc.c
+++ linux-3.10.0-123.13.2.el7.x86_64/fs/ext4/mballoc.c
@@ -5281,7 +5281,6 @@ out:
 				void *buddy, void *bitmap, ext4_group_t group)
 {
 	struct ext4_group_info *grp = ext4_get_group_info(sb, group);
-	struct ext4_sb_info *sbi = EXT4_SB(sb);
 	ext4_grpblk_t max = EXT4_CLUSTERS_PER_GROUP(sb);
 	ext4_grpblk_t i = 0;
 	ext4_grpblk_t first;