diff --git a/fsck/f2fs.h b/fsck/f2fs.h
index 0b136b0..a0fca45 100644
--- a/fsck/f2fs.h
+++ b/fsck/f2fs.h
@@ -608,8 +608,8 @@ static inline int inline_xattr_size(struct f2fs_inode *inode)
 }
 
 extern int lookup_nat_in_journal(struct f2fs_sb_info *sbi, u32 nid, struct f2fs_nat_entry *ne);
-#define IS_SUM_NODE_SEG(footer)		(footer.entry_type == SUM_TYPE_NODE)
-#define IS_SUM_DATA_SEG(footer)		(footer.entry_type == SUM_TYPE_DATA)
+#define IS_SUM_NODE_SEG(sum)		(F2FS_SUMMARY_BLOCK_FOOTER(sum)->entry_type == SUM_TYPE_NODE)
+#define IS_SUM_DATA_SEG(sum)		(F2FS_SUMMARY_BLOCK_FOOTER(sum)->entry_type == SUM_TYPE_DATA)
 
 static inline unsigned int dir_buckets(unsigned int level, int dir_level)
 {
diff --git a/fsck/fsck.c b/fsck/fsck.c
index 769ee65..e605d3c 100644
--- a/fsck/fsck.c
+++ b/fsck/fsck.c
@@ -172,7 +172,7 @@ static int is_valid_ssa_node_blk(struct f2fs_sb_info *sbi, u32 nid,
 		se = get_seg_entry(sbi, segno);
 		if(IS_NODESEG(se->type)) {
 			ASSERT_MSG("Summary footer indicates a node segment: 0x%x", segno);
-			sum_blk->footer.entry_type = SUM_TYPE_NODE;
+			F2FS_SUMMARY_BLOCK_FOOTER(sum_blk)->entry_type = SUM_TYPE_NODE;
 		} else {
 			ret = -EINVAL;
 			goto out;
@@ -297,7 +297,7 @@ static int is_valid_ssa_data_blk(struct f2fs_sb_info *sbi, u32 blk_addr,
 		se = get_seg_entry(sbi, segno);
 		if (IS_DATASEG(se->type)) {
 			ASSERT_MSG("Summary footer indicates a data segment: 0x%x", segno);
-			sum_blk->footer.entry_type = SUM_TYPE_DATA;
+			F2FS_SUMMARY_BLOCK_FOOTER(sum_blk)->entry_type = SUM_TYPE_DATA;
 		} else {
 			ret = -EINVAL;
 			goto out;
@@ -3299,16 +3299,16 @@ int fsck_chk_curseg_info(struct f2fs_sb_info *sbi)
 				se->type = i;
 			ret = -1;
 		}
-		if (i <= CURSEG_COLD_DATA && IS_SUM_DATA_SEG(sum_blk->footer)) {
+		if (i <= CURSEG_COLD_DATA && IS_SUM_DATA_SEG(sum_blk)) {
 			continue;
-		} else if (i > CURSEG_COLD_DATA && IS_SUM_NODE_SEG(sum_blk->footer)) {
+		} else if (i > CURSEG_COLD_DATA && IS_SUM_NODE_SEG(sum_blk)) {
 			continue;
 		} else {
 			ASSERT_MSG("Incorrect curseg [%d]: segno [0x%x] "
 				   "type(SSA) [%d]", i, curseg->segno,
-				   sum_blk->footer.entry_type);
+				   F2FS_SUMMARY_BLOCK_FOOTER(sum_blk)->entry_type);
 			if (c.fix_on || c.preen_mode)
-				sum_blk->footer.entry_type =
+				F2FS_SUMMARY_BLOCK_FOOTER(sum_blk)->entry_type =
 					i <= CURSEG_COLD_DATA ?
 					SUM_TYPE_DATA : SUM_TYPE_NODE;
 			ret = -1;
diff --git a/fsck/mount.c b/fsck/mount.c
index b9fff15..732bfb3 100644
--- a/fsck/mount.c
+++ b/fsck/mount.c
@@ -1588,7 +1588,7 @@ static int f2fs_early_init_nid_bitmap(struct f2fs_sb_info *sbi)
 	int nid_bitmap_size = (nm_i->max_nid + BITS_PER_BYTE - 1) / BITS_PER_BYTE;
 	struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
 	struct f2fs_summary_block *sum = curseg->sum_blk;
-	struct f2fs_journal *journal = &sum->journal;
+	struct f2fs_journal *journal = F2FS_SUMMARY_BLOCK_JOURNAL(sum);
 	nid_t nid;
 	int i;
 
@@ -1773,7 +1773,7 @@ static int check_nat_bits(struct f2fs_sb_info *sbi,
 					8 + F2FS_BLKSIZE - 1);
 	unsigned char *nat_bits, *full_nat_bits, *empty_nat_bits;
 	struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
-	struct f2fs_journal *journal = &curseg->sum_blk->journal;
+	struct f2fs_journal *journal = F2FS_SUMMARY_BLOCK_JOURNAL(curseg->sum_blk);
 	uint32_t i, j;
 	block_t blkaddr;
 	int err = 0;
@@ -1974,12 +1974,12 @@ void reset_curseg(struct f2fs_sb_info *sbi, int type)
 	struct summary_footer *sum_footer;
 	struct seg_entry *se;
 
-	sum_footer = &(curseg->sum_blk->footer);
+	sum_footer = F2FS_SUMMARY_BLOCK_FOOTER(curseg->sum_blk);
 	memset(sum_footer, 0, sizeof(struct summary_footer));
 	if (IS_DATASEG(type))
-		SET_SUM_TYPE(sum_footer, SUM_TYPE_DATA);
+		SET_SUM_TYPE(curseg->sum_blk, SUM_TYPE_DATA);
 	if (IS_NODESEG(type))
-		SET_SUM_TYPE(sum_footer, SUM_TYPE_NODE);
+		SET_SUM_TYPE(curseg->sum_blk, SUM_TYPE_NODE);
 	se = get_seg_entry(sbi, curseg->segno);
 	se->type = type;
 	se->dirty = 1;
@@ -2002,10 +2002,10 @@ static void read_compacted_summaries(struct f2fs_sb_info *sbi)
 	ASSERT(ret >= 0);
 
 	curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
-	memcpy(&curseg->sum_blk->journal.n_nats, kaddr, SUM_JOURNAL_SIZE);
+	memcpy(&F2FS_SUMMARY_BLOCK_JOURNAL(curseg->sum_blk)->n_nats, kaddr, SUM_JOURNAL_SIZE);
 
 	curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
-	memcpy(&curseg->sum_blk->journal.n_sits, kaddr + SUM_JOURNAL_SIZE,
+	memcpy(&F2FS_SUMMARY_BLOCK_JOURNAL(curseg->sum_blk)->n_sits, kaddr + SUM_JOURNAL_SIZE,
 						SUM_JOURNAL_SIZE);
 
 	offset = 2 * SUM_JOURNAL_SIZE;
@@ -2088,7 +2088,7 @@ static void read_normal_summaries(struct f2fs_sb_info *sbi, int type)
 			blk_addr = GET_SUM_BLKADDR(sbi, segno);
 	}
 
-	sum_blk = malloc(sizeof(*sum_blk));
+	sum_blk = malloc(F2FS_BLKSIZE);
 	ASSERT(sum_blk);
 
 	ret = dev_read_block(sum_blk, blk_addr);
@@ -2098,7 +2098,7 @@ static void read_normal_summaries(struct f2fs_sb_info *sbi, int type)
 		restore_node_summary(sbi, segno, sum_blk);
 
 	curseg = CURSEG_I(sbi, type);
-	memcpy(curseg->sum_blk, sum_blk, sizeof(*sum_blk));
+	memcpy(curseg->sum_blk, sum_blk, F2FS_BLKSIZE);
 	reset_curseg(sbi, type);
 	free(sum_blk);
 }
@@ -2122,7 +2122,7 @@ void update_sum_entry(struct f2fs_sb_info *sbi, block_t blk_addr,
 
 	sum_blk = get_sum_block(sbi, segno, &type);
 	memcpy(&sum_blk->entries[offset], sum, sizeof(*sum));
-	sum_blk->footer.entry_type = IS_NODESEG(se->type) ? SUM_TYPE_NODE :
+	F2FS_SUMMARY_BLOCK_FOOTER(sum_blk)->entry_type = IS_NODESEG(se->type) ? SUM_TYPE_NODE :
 							SUM_TYPE_DATA;
 
 	/* write SSA all the time */
@@ -2164,7 +2164,7 @@ static int build_curseg(struct f2fs_sb_info *sbi)
 	SM_I(sbi)->curseg_array = array;
 
 	for (i = 0; i < NR_CURSEG_TYPE; i++) {
-		array[i].sum_blk = calloc(sizeof(*(array[i].sum_blk)), 1);
+		array[i].sum_blk = calloc(F2FS_BLKSIZE, 1);
 		if (!array[i].sum_blk) {
 			MSG(1, "\tError: Calloc failed for build_curseg!!\n");
 			goto seg_cleanup;
@@ -2334,7 +2334,7 @@ struct f2fs_summary_block *get_sum_block(struct f2fs_sb_info *sbi,
 	for (type = 0; type < NR_CURSEG_NODE_TYPE; type++) {
 		if (segno == get_cp(cur_node_segno[type])) {
 			curseg = CURSEG_I(sbi, CURSEG_HOT_NODE + type);
-			if (!IS_SUM_NODE_SEG(curseg->sum_blk->footer)) {
+			if (!IS_SUM_NODE_SEG(curseg->sum_blk)) {
 				ASSERT_MSG("segno [0x%x] indicates a data "
 						"segment, but should be node",
 						segno);
@@ -2349,7 +2349,7 @@ struct f2fs_summary_block *get_sum_block(struct f2fs_sb_info *sbi,
 	for (type = 0; type < NR_CURSEG_DATA_TYPE; type++) {
 		if (segno == get_cp(cur_data_segno[type])) {
 			curseg = CURSEG_I(sbi, type);
-			if (IS_SUM_NODE_SEG(curseg->sum_blk->footer)) {
+			if (IS_SUM_NODE_SEG(curseg->sum_blk)) {
 				ASSERT_MSG("segno [0x%x] indicates a node "
 						"segment, but should be data",
 						segno);
@@ -2367,9 +2367,9 @@ struct f2fs_summary_block *get_sum_block(struct f2fs_sb_info *sbi,
 	ret = dev_read_block(sum_blk, ssa_blk);
 	ASSERT(ret >= 0);
 
-	if (IS_SUM_NODE_SEG(sum_blk->footer))
+	if (IS_SUM_NODE_SEG(sum_blk))
 		*ret_type = SEG_TYPE_NODE;
-	else if (IS_SUM_DATA_SEG(sum_blk->footer))
+	else if (IS_SUM_DATA_SEG(sum_blk))
 		*ret_type = SEG_TYPE_DATA;
 
 	return sum_blk;
@@ -2519,7 +2519,7 @@ static int build_sit_entries(struct f2fs_sb_info *sbi)
 {
 	struct sit_info *sit_i = SIT_I(sbi);
 	struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
-	struct f2fs_journal *journal = &curseg->sum_blk->journal;
+	struct f2fs_journal *journal = F2FS_SUMMARY_BLOCK_JOURNAL(curseg->sum_blk);
 	struct f2fs_sit_block *sit_blk;
 	struct seg_entry *se;
 	struct f2fs_sit_entry sit;
@@ -2685,7 +2685,7 @@ void rewrite_sit_area_bitmap(struct f2fs_sb_info *sbi)
 	sit_blk = calloc(BLOCK_SZ, 1);
 	ASSERT(sit_blk);
 	/* remove sit journal */
-	sum->journal.n_sits = 0;
+	F2FS_SUMMARY_BLOCK_JOURNAL(sum)->n_sits = 0;
 
 	ptr = fsck->main_area_bitmap;
 
@@ -2726,7 +2726,7 @@ void rewrite_sit_area_bitmap(struct f2fs_sb_info *sbi)
 static int flush_sit_journal_entries(struct f2fs_sb_info *sbi)
 {
 	struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
-	struct f2fs_journal *journal = &curseg->sum_blk->journal;
+	struct f2fs_journal *journal = F2FS_SUMMARY_BLOCK_JOURNAL(curseg->sum_blk);
 	struct sit_info *sit_i = SIT_I(sbi);
 	struct f2fs_sit_block *sit_blk;
 	unsigned int segno;
@@ -2760,7 +2760,7 @@ static int flush_sit_journal_entries(struct f2fs_sb_info *sbi)
 static int flush_nat_journal_entries(struct f2fs_sb_info *sbi)
 {
 	struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
-	struct f2fs_journal *journal = &curseg->sum_blk->journal;
+	struct f2fs_journal *journal = F2FS_SUMMARY_BLOCK_JOURNAL(curseg->sum_blk);
 	struct f2fs_nat_block *nat_block;
 	pgoff_t block_addr;
 	int entry_off;
@@ -3064,7 +3064,7 @@ void zero_journal_entries(struct f2fs_sb_info *sbi)
 	int i;
 
 	for (i = 0; i < NO_CHECK_TYPE; i++)
-		CURSEG_I(sbi, i)->sum_blk->journal.n_nats = 0;
+		F2FS_SUMMARY_BLOCK_JOURNAL(CURSEG_I(sbi, i)->sum_blk)->n_nats = 0;
 }
 
 void write_curseg_info(struct f2fs_sb_info *sbi)
@@ -3092,7 +3092,7 @@ int lookup_nat_in_journal(struct f2fs_sb_info *sbi, u32 nid,
 					struct f2fs_nat_entry *raw_nat)
 {
 	struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
-	struct f2fs_journal *journal = &curseg->sum_blk->journal;
+	struct f2fs_journal *journal = F2FS_SUMMARY_BLOCK_JOURNAL(curseg->sum_blk);
 	int i = 0;
 
 	for (i = 0; i < nats_in_cursum(journal); i++) {
@@ -3109,7 +3109,7 @@ int lookup_nat_in_journal(struct f2fs_sb_info *sbi, u32 nid,
 void nullify_nat_entry(struct f2fs_sb_info *sbi, u32 nid)
 {
 	struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
-	struct f2fs_journal *journal = &curseg->sum_blk->journal;
+	struct f2fs_journal *journal = F2FS_SUMMARY_BLOCK_JOURNAL(curseg->sum_blk);
 	struct f2fs_nat_block *nat_block;
 	pgoff_t block_addr;
 	int entry_off;
@@ -3153,7 +3153,7 @@ void update_nat_journal_blkaddr(struct f2fs_sb_info *sbi, u32 nid,
 					block_t blkaddr)
 {
 	struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
-	struct f2fs_journal *journal = &curseg->sum_blk->journal;
+	struct f2fs_journal *journal = F2FS_SUMMARY_BLOCK_JOURNAL(curseg->sum_blk);
 	int i;
 
 	for (i = 0; i < nats_in_cursum(journal); i++) {
@@ -3314,7 +3314,7 @@ void write_checkpoints(struct f2fs_sb_info *sbi)
 void build_nat_area_bitmap(struct f2fs_sb_info *sbi)
 {
 	struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
-	struct f2fs_journal *journal = &curseg->sum_blk->journal;
+	struct f2fs_journal *journal = F2FS_SUMMARY_BLOCK_JOURNAL(curseg->sum_blk);
 	struct f2fs_fsck *fsck = F2FS_FSCK(sbi);
 	struct f2fs_super_block *sb = F2FS_RAW_SUPER(sbi);
 	struct f2fs_nm_info *nm_i = NM_I(sbi);
diff --git a/fsck/resize.c b/fsck/resize.c
index 2fd3941..6c3f4bd 100644
--- a/fsck/resize.c
+++ b/fsck/resize.c
@@ -222,7 +222,7 @@ static void move_ssa(struct f2fs_sb_info *sbi, unsigned int segno,
 		ASSERT(ret >= 0);
 		DBG(1, "Write summary block: (%d) segno=%x/%x --> (%d) %x\n",
 				type, segno, GET_SUM_BLKADDR(sbi, segno),
-				IS_SUM_NODE_SEG(sum_blk->footer),
+				IS_SUM_NODE_SEG(sum_blk),
 				new_sum_blk_addr);
 	}
 	if (type == SEG_TYPE_NODE || type == SEG_TYPE_DATA ||
diff --git a/include/f2fs_fs.h b/include/f2fs_fs.h
index b2d479f..e6c68b2 100644
--- a/include/f2fs_fs.h
+++ b/include/f2fs_fs.h
@@ -620,8 +620,8 @@ enum {
 /*
  * Copied from fs/f2fs/segment.h
  */
-#define GET_SUM_TYPE(footer) ((footer)->entry_type)
-#define SET_SUM_TYPE(footer, type) ((footer)->entry_type = type)
+#define GET_SUM_TYPE(sum) (F2FS_SUMMARY_BLOCK_FOOTER(sum)->entry_type)
+#define SET_SUM_TYPE(sum, type) (F2FS_SUMMARY_BLOCK_FOOTER(sum)->entry_type = type)
 
 /*
  * Copied from include/linux/f2fs_sb.h
@@ -630,6 +630,7 @@ enum {
 #define F2FS_MIN_LOG_SECTOR_SIZE	9	/* 9 bits for 512 bytes */
 #define F2FS_MAX_LOG_SECTOR_SIZE	F2FS_BLKSIZE_BITS	/* 12 bits for 4096 bytes */
 #define F2FS_BLKSIZE			(1 << F2FS_BLKSIZE_BITS)/* support only 4KB block */
+#define F2FS_MAX_BLKSIZE		16384
 #define F2FS_MAX_EXTENSION		64	/* # of extension entries */
 #define F2FS_EXTENSION_LEN		8	/* max size of extension */
 #define F2FS_BLK_ALIGN(x)	(((x) + F2FS_BLKSIZE - 1) / F2FS_BLKSIZE)
@@ -1253,13 +1254,15 @@ struct nat_journal_entry {
 
 static_assert(sizeof(struct nat_journal_entry) == 13, "");
 
+/*
+ * Layout is as follows:
+ * struct nat_journal_entry entries[NAT_JOURNAL_ENTRIES];
+ * __u8 reserved[NAT_JOURNAL_RESERVED];
+ */
 struct nat_journal {
-	struct nat_journal_entry entries[NAT_JOURNAL_ENTRIES];
-	__u8 reserved[NAT_JOURNAL_RESERVED];
+	struct nat_journal_entry entries[0];
 };
 
-static_assert(sizeof(struct nat_journal) == (F2FS_BLKSIZE / 8) - 7, "");
-
 struct sit_journal_entry {
 	__le32 segno;
 	struct f2fs_sit_entry se;
@@ -1267,20 +1270,28 @@ struct sit_journal_entry {
 
 static_assert(sizeof(struct sit_journal_entry) == 78, "");
 
+/*
+ * Layout is as follows:
+ * struct sit_journal_entry entries[SIT_JOURNAL_ENTRIES];
+ * __u8 reserved[SIT_JOURNAL_RESERVED];
+ */
 struct sit_journal {
-	struct sit_journal_entry entries[SIT_JOURNAL_ENTRIES];
-	__u8 reserved[SIT_JOURNAL_RESERVED];
+	struct sit_journal_entry entries[0];
 };
 
-static_assert(sizeof(struct sit_journal) == (F2FS_BLKSIZE / 8) - 7, "");
-
+/*
+ * Layout is as follows:
+ * __le64 kbytes_written;
+ * __u8 reserved[EXTRA_INFO_RESERVED];
+ */
 struct f2fs_extra_info {
 	__le64 kbytes_written;
-	__u8 reserved[EXTRA_INFO_RESERVED];
+	__u8 reserved[0];
 } __attribute__((packed));
 
-static_assert(sizeof(struct f2fs_extra_info) == (F2FS_BLKSIZE / 8) - 7, "");
-
+/*
+ * This struct's used size depends on F2FS_BLKSIZE. DO NOT use sizeof
+ */
 struct f2fs_journal {
 	union {
 		__le16 n_nats;
@@ -1294,16 +1305,22 @@ struct f2fs_journal {
 	};
 } __attribute__((packed));
 
-static_assert(sizeof(struct f2fs_journal) == (F2FS_BLKSIZE / 8) - 5, "");
-
-/* 4KB-sized summary block structure */
+/*
+ * Block-sized summary block structure
+ * Layout of f2fs_summary block is
+ * struct f2fs_summary entries[ENTRIES_IN_SUM];
+ * struct f2fs_journal journal;
+ * struct summary_footer footer;
+ *
+ * Do NOT use sizeof, use F2FS_BLKSIZE
+ *
+ */
 struct f2fs_summary_block {
-	struct f2fs_summary entries[ENTRIES_IN_SUM];
-	struct f2fs_journal journal;
-	struct summary_footer footer;
+	struct f2fs_summary entries[0];
 };
-
-static_assert(sizeof(struct f2fs_summary_block) == F2FS_BLKSIZE, "");
+#define F2FS_SUMMARY_BLOCK_JOURNAL(blk) ((struct f2fs_journal *)(&(blk)->entries[ENTRIES_IN_SUM]))
+#define F2FS_SUMMARY_BLOCK_FOOTER(blk) ((struct summary_footer *)&((char *)\
+					(&(blk)->entries[0]))[F2FS_BLKSIZE - SUM_FOOTER_SIZE])
 
 /*
  * For directory operations
@@ -1511,9 +1528,15 @@ struct f2fs_configuration {
 	compress_config_t compress;
 
 	block_t curseg_offset[NR_CURSEG_TYPE];
-	struct f2fs_journal sit_jnl;
-	struct f2fs_journal nat_jnl;
 	struct f2fs_summary sum[NR_CURSEG_TYPE][MAX_CACHE_SUMS];
+	union {
+		struct f2fs_journal sit_jnl;
+		char sit_bytes[F2FS_MAX_BLKSIZE];
+	};
+	union {
+		struct f2fs_journal nat_jnl;
+		char nat_bytes[F2FS_MAX_BLKSIZE];
+	};
 };
 
 extern int utf8_to_utf16(char *, const char *, size_t, size_t);
@@ -2003,6 +2026,20 @@ static inline void check_block_struct_sizes(void)
 	/* Check SIT Block Size */
 	assert((SIT_ENTRY_PER_BLOCK + 1) * sizeof(struct f2fs_nat_entry) > F2FS_BLKSIZE);
 	assert(SIT_ENTRY_PER_BLOCK * sizeof(struct f2fs_sit_entry) <= F2FS_BLKSIZE);
+
+	/* Check NAT Journal Block Size */
+	assert(sizeof(struct f2fs_summary) * ENTRIES_IN_SUM
+			+ NAT_JOURNAL_ENTRIES * sizeof(struct sit_journal_entry)
+			+ NAT_JOURNAL_RESERVED + sizeof(struct summary_footer) == F2FS_BLKSIZE);
+
+	/* Check SIT Journal Block Size */
+	assert(sizeof(struct f2fs_summary) * ENTRIES_IN_SUM
+			+ SIT_JOURNAL_ENTRIES * sizeof(struct nat_journal_entry)
+			+ SIT_JOURNAL_RESERVED + sizeof(struct summary_footer) == F2FS_BLKSIZE);
+
+	/* Check Info Journal Block Size */
+	assert(sizeof(struct f2fs_summary) * ENTRIES_IN_SUM + sizeof(__le64)
+			+ EXTRA_INFO_RESERVED + sizeof(struct summary_footer) == F2FS_BLKSIZE);
 }
 
 #endif	/*__F2FS_FS_H */
diff --git a/mkfs/f2fs_format.c b/mkfs/f2fs_format.c
index e8565ee..461bd77 100644
--- a/mkfs/f2fs_format.c
+++ b/mkfs/f2fs_format.c
@@ -929,8 +929,8 @@ static int f2fs_write_check_point_pack(void)
 	sum_compact_p += SUM_JOURNAL_SIZE;
 
 	/* hot data summary */
-	memset(sum, 0, sizeof(struct f2fs_summary_block));
-	SET_SUM_TYPE((&sum->footer), SUM_TYPE_DATA);
+	memset(sum, 0, F2FS_BLKSIZE);
+	SET_SUM_TYPE(sum, SUM_TYPE_DATA);
 
 	sum_entry = (struct f2fs_summary *)sum_compact_p;
 	memcpy(sum_entry, c.sum[CURSEG_HOT_DATA],
@@ -948,8 +948,8 @@ static int f2fs_write_check_point_pack(void)
 	}
 
 	/* Prepare and write Segment summary for HOT_NODE */
-	memset(sum, 0, sizeof(struct f2fs_summary_block));
-	SET_SUM_TYPE((&sum->footer), SUM_TYPE_NODE);
+	memset(sum, 0, F2FS_BLKSIZE);
+	SET_SUM_TYPE(sum, SUM_TYPE_NODE);
 	memcpy(sum->entries, c.sum[CURSEG_HOT_NODE],
 			sizeof(struct f2fs_summary) * MAX_CACHE_SUMS);
 
@@ -962,8 +962,8 @@ static int f2fs_write_check_point_pack(void)
 	}
 
 	/* Fill segment summary for WARM_NODE to zero. */
-	memset(sum, 0, sizeof(struct f2fs_summary_block));
-	SET_SUM_TYPE((&sum->footer), SUM_TYPE_NODE);
+	memset(sum, 0, F2FS_BLKSIZE);
+	SET_SUM_TYPE(sum, SUM_TYPE_NODE);
 
 	cp_seg_blk++;
 	DBG(1, "\tWriting Segment summary for WARM_NODE, at offset 0x%08"PRIx64"\n",
@@ -974,8 +974,8 @@ static int f2fs_write_check_point_pack(void)
 	}
 
 	/* Fill segment summary for COLD_NODE to zero. */
-	memset(sum, 0, sizeof(struct f2fs_summary_block));
-	SET_SUM_TYPE((&sum->footer), SUM_TYPE_NODE);
+	memset(sum, 0, F2FS_BLKSIZE);
+	SET_SUM_TYPE(sum, SUM_TYPE_NODE);
 	cp_seg_blk++;
 	DBG(1, "\tWriting Segment summary for COLD_NODE, at offset 0x%08"PRIx64"\n",
 			cp_seg_blk);
