diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index c29d774abe5536f2bc087ab2519344ee4c1f215b..ba411233cc252a5e5fbf63b20f99de946043daed 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -295,7 +295,7 @@ static int ext4_valid_block_bitmap(struct super_block *sb,
 	return 0;
 }
 /**
- * read_block_bitmap()
+ * ext4_read_block_bitmap()
  * @sb:			super block
  * @block_group:	given block group
  *
@@ -305,7 +305,7 @@ static int ext4_valid_block_bitmap(struct super_block *sb,
  * Return buffer_head on success or NULL in case of failure.
  */
 struct buffer_head *
-read_block_bitmap(struct super_block *sb, ext4_group_t block_group)
+ext4_read_block_bitmap(struct super_block *sb, ext4_group_t block_group)
 {
 	struct ext4_group_desc * desc;
 	struct buffer_head * bh = NULL;
@@ -693,7 +693,7 @@ void ext4_free_blocks_sb(handle_t *handle, struct super_block *sb,
 		count -= overflow;
 	}
 	brelse(bitmap_bh);
-	bitmap_bh = read_block_bitmap(sb, block_group);
+	bitmap_bh = ext4_read_block_bitmap(sb, block_group);
 	if (!bitmap_bh)
 		goto error_return;
 	desc = ext4_get_group_desc (sb, block_group, &gd_bh);
@@ -1733,7 +1733,7 @@ ext4_fsblk_t ext4_new_blocks_old(handle_t *handle, struct inode *inode,
 		my_rsv = NULL;
 
 	if (free_blocks > 0) {
-		bitmap_bh = read_block_bitmap(sb, group_no);
+		bitmap_bh = ext4_read_block_bitmap(sb, group_no);
 		if (!bitmap_bh)
 			goto io_error;
 		grp_alloc_blk = ext4_try_to_allocate_with_rsv(sb, handle,
@@ -1769,7 +1769,7 @@ ext4_fsblk_t ext4_new_blocks_old(handle_t *handle, struct inode *inode,
 			continue;
 
 		brelse(bitmap_bh);
-		bitmap_bh = read_block_bitmap(sb, group_no);
+		bitmap_bh = ext4_read_block_bitmap(sb, group_no);
 		if (!bitmap_bh)
 			goto io_error;
 		/*
@@ -1985,7 +1985,7 @@ ext4_fsblk_t ext4_count_free_blocks(struct super_block *sb)
 			continue;
 		desc_count += le16_to_cpu(gdp->bg_free_blocks_count);
 		brelse(bitmap_bh);
-		bitmap_bh = read_block_bitmap(sb, i);
+		bitmap_bh = ext4_read_block_bitmap(sb, i);
 		if (bitmap_bh == NULL)
 			continue;
 
diff --git a/fs/ext4/group.h b/fs/ext4/group.h
index 7eb0604e7eea8f76973175fc3ee6b247a79171cb..c2c0a8d06d0e059ba949bcadd9081555ab7f298c 100644
--- a/fs/ext4/group.h
+++ b/fs/ext4/group.h
@@ -13,7 +13,7 @@ extern __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 group,
 				   struct ext4_group_desc *gdp);
 extern int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 group,
 				       struct ext4_group_desc *gdp);
-struct buffer_head *read_block_bitmap(struct super_block *sb,
+struct buffer_head *ext4_read_block_bitmap(struct super_block *sb,
 				      ext4_group_t block_group);
 extern unsigned ext4_init_block_bitmap(struct super_block *sb,
 				       struct buffer_head *bh,
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index 11cafe14aa2725482d6ef592e9eb6475af6a8bfb..b30cc79b9fcb10de1302a8a19029332a164d2e7a 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -600,7 +600,7 @@ struct inode *ext4_new_inode(handle_t *handle, struct inode * dir, int mode)
 	/* We may have to initialize the block bitmap if it isn't already */
 	if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM) &&
 	    gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) {
-		struct buffer_head *block_bh = read_block_bitmap(sb, group);
+		struct buffer_head *block_bh = ext4_read_block_bitmap(sb, group);
 
 		BUFFER_TRACE(block_bh, "get block bitmap access");
 		err = ext4_journal_get_write_access(handle, block_bh);
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 6d69dd92aadb6d46bb60b7c96a5ec3996a3e950f..21ee6d42ee7b91a740d2fcf9d47acfe5a4dfc01e 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2326,7 +2326,7 @@ static int ext4_mb_init_backend(struct super_block *sb)
 			meta_group_info[j]->bb_bitmap =
 				kmalloc(sb->s_blocksize, GFP_KERNEL);
 			BUG_ON(meta_group_info[j]->bb_bitmap == NULL);
-			bh = read_block_bitmap(sb, i);
+			bh = ext4_read_block_bitmap(sb, i);
 			BUG_ON(bh == NULL);
 			memcpy(meta_group_info[j]->bb_bitmap, bh->b_data,
 					sb->s_blocksize);
@@ -2769,7 +2769,7 @@ ext4_mb_mark_diskspace_used(struct ext4_allocation_context *ac,
 
 
 	err = -EIO;
-	bitmap_bh = read_block_bitmap(sb, ac->ac_b_ex.fe_group);
+	bitmap_bh = ext4_read_block_bitmap(sb, ac->ac_b_ex.fe_group);
 	if (!bitmap_bh)
 		goto out_err;
 
@@ -3589,7 +3589,7 @@ ext4_mb_discard_group_preallocations(struct super_block *sb,
 	if (list_empty(&grp->bb_prealloc_list))
 		return 0;
 
-	bitmap_bh = read_block_bitmap(sb, group);
+	bitmap_bh = ext4_read_block_bitmap(sb, group);
 	if (bitmap_bh == NULL) {
 		/* error handling here */
 		ext4_mb_release_desc(&e4b);
@@ -3763,7 +3763,7 @@ void ext4_mb_discard_inode_preallocations(struct inode *inode)
 		err = ext4_mb_load_buddy(sb, group, &e4b);
 		BUG_ON(err != 0); /* error handling here */
 
-		bitmap_bh = read_block_bitmap(sb, group);
+		bitmap_bh = ext4_read_block_bitmap(sb, group);
 		if (bitmap_bh == NULL) {
 			/* error handling here */
 			ext4_mb_release_desc(&e4b);
@@ -4262,7 +4262,7 @@ void ext4_mb_free_blocks(handle_t *handle, struct inode *inode,
 		overflow = bit + count - EXT4_BLOCKS_PER_GROUP(sb);
 		count -= overflow;
 	}
-	bitmap_bh = read_block_bitmap(sb, block_group);
+	bitmap_bh = ext4_read_block_bitmap(sb, block_group);
 	if (!bitmap_bh)
 		goto error_return;
 	gdp = ext4_get_group_desc(sb, block_group, &gd_bh);