diff --git a/fs/nilfs2/btree.c b/fs/nilfs2/btree.c
index f609a8532ec5cf82a0cc448a05fbfc33b29cd732..3a3821b00486b531e72ff931be80b3627a0ddca1 100644
--- a/fs/nilfs2/btree.c
+++ b/fs/nilfs2/btree.c
@@ -1851,7 +1851,7 @@ int nilfs_btree_convert_and_insert(struct nilfs_bmap *btree,
 				   __u64 key, __u64 ptr,
 				   const __u64 *keys, const __u64 *ptrs, int n)
 {
-	struct buffer_head *bh;
+	struct buffer_head *bh = NULL;
 	union nilfs_bmap_ptr_req dreq, nreq, *di, *ni;
 	struct nilfs_bmap_stats stats;
 	int ret;
diff --git a/fs/nilfs2/recovery.c b/fs/nilfs2/recovery.c
index ff00a0b7acb927ee18a9dba898aac5cf55b2def5..9b4f205d11736dc4d109828260055c2af34c0e9d 100644
--- a/fs/nilfs2/recovery.c
+++ b/fs/nilfs2/recovery.c
@@ -582,7 +582,7 @@ static int nilfs_do_roll_forward(struct the_nilfs *nilfs,
 				 struct nilfs_recovery_info *ri)
 {
 	struct buffer_head *bh_sum = NULL;
-	struct nilfs_segment_summary *sum;
+	struct nilfs_segment_summary *sum = NULL;
 	sector_t pseg_start;
 	sector_t seg_start, seg_end;  /* Starting/ending DBN of full segment */
 	unsigned long nsalvaged_blocks = 0;
@@ -814,7 +814,7 @@ int nilfs_search_super_root(struct the_nilfs *nilfs,
 			    struct nilfs_recovery_info *ri)
 {
 	struct buffer_head *bh_sum = NULL;
-	struct nilfs_segment_summary *sum;
+	struct nilfs_segment_summary *sum = NULL;
 	sector_t pseg_start, pseg_end, sr_pseg_start = 0;
 	sector_t seg_start, seg_end; /* range of full segment (block number) */
 	sector_t b, end;
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index c69455a543bc65e2960b9ff2cca3a8ce8f4f1859..354013ea22ec212001ef2c300fdf282ad39c611d 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -361,7 +361,7 @@ static int nilfs_move_2nd_super(struct super_block *sb, loff_t sb2off)
 	struct nilfs_super_block *nsbp;
 	sector_t blocknr, newblocknr;
 	unsigned long offset;
-	int sb2i = -1;  /* array index of the secondary superblock */
+	int sb2i;  /* array index of the secondary superblock */
 	int ret = 0;
 
 	/* nilfs->ns_sem must be locked by the caller. */
@@ -372,6 +372,9 @@ static int nilfs_move_2nd_super(struct super_block *sb, loff_t sb2off)
 	} else if (nilfs->ns_sbh[0]->b_blocknr > nilfs->ns_first_data_block) {
 		sb2i = 0;
 		blocknr = nilfs->ns_sbh[0]->b_blocknr;
+	} else {
+		sb2i = -1;
+		blocknr = 0;
 	}
 	if (sb2i >= 0 && (u64)blocknr << nilfs->ns_blocksize_bits == sb2off)
 		goto out;  /* super block location is unchanged */