Code cleanup suggested by static analysis tool.

fs/jfs/jfs_dtree.c

@@ -2978,7 +2978,6 @@ int jfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
 	int d_namleft, len, outlen;
 	unsigned long dirent_buf;
 	char *name_ptr;
-	int dtlhdrdatalen;
 	u32 dir_index;
 	int do_index = 0;
 	uint loop_count = 0;
@@ -2998,7 +2997,6 @@ int jfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
 		 *                      -1 = End of directory
 		 */
 		do_index = 1;
-		dtlhdrdatalen = DTLHDRDATALEN;
 
 		dir_index = (u32) filp->f_pos;
 
@@ -3083,8 +3081,6 @@ int jfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
 		 * pn > 0:              Real entries, pn=1 -> leftmost page
 		 * pn = index = -1:     No more entries
 		 */
-		dtlhdrdatalen = DTLHDRDATALEN_LEGACY;
-
 		dtpos = filp->f_pos;
 		if (dtpos == 0) {
 			/* build "." entry */

fs/jfs/jfs_extent.c

@@ -91,7 +91,7 @@ extAlloc(struct inode *ip, s64 xlen, s64 pno, xad_t * xp, boolean_t abnr)
 {
 	struct jfs_sb_info *sbi = JFS_SBI(ip->i_sb);
 	s64 nxlen, nxaddr, xoff, hint, xaddr = 0;
-	int rc, nbperpage;
+	int rc;
 	int xflag;
 
 	/* This blocks if we are low on resources */
@@ -104,9 +104,6 @@ extAlloc(struct inode *ip, s64 xlen, s64 pno, xad_t * xp, boolean_t abnr)
 	if (xlen > MAXXLEN)
 		xlen = MAXXLEN;
 
-	/* get the number of blocks per page */
-	nbperpage = sbi->nbperpage;
-
 	/* get the page's starting extent offset */
 	xoff = pno << sbi->l2nbperpage;
 

fs/jfs/jfs_imap.c

@@ -2966,7 +2966,6 @@ static void duplicateIXtree(struct super_block *sb, s64 blkno,
 	struct buffer_head *bh;
 	struct inode *ip;
 	tid_t tid;
-	int rc;
 
 	/* if AIT2 ipmap2 is bad, do not try to update it */
 	if (JFS_SBI(sb)->mntflag & JFS_BAD_SAIT)	/* s_flag */
@@ -2974,7 +2973,7 @@ static void duplicateIXtree(struct super_block *sb, s64 blkno,
 	ip = diReadSpecial(sb, FILESYSTEM_I, 1);
 	if (ip == NULL) {
 		JFS_SBI(sb)->mntflag |= JFS_BAD_SAIT;
-		if ((rc = readSuper(sb, &bh)))
+		if (readSuper(sb, &bh))
 			return;
 		j_sb = (struct jfs_superblock *)bh->b_data;
 		j_sb->s_flag |= JFS_BAD_SAIT;
@@ -2988,7 +2987,7 @@ static void duplicateIXtree(struct super_block *sb, s64 blkno,
 	/* start transaction */
 	tid = txBegin(sb, COMMIT_FORCE);
 	/* update the inode map addressing structure to point to it */
-	if ((rc = xtInsert(tid, ip, 0, blkno, xlen, xaddr, 0))) {
+	if (xtInsert(tid, ip, 0, blkno, xlen, xaddr, 0)) {
 		JFS_SBI(sb)->mntflag |= JFS_BAD_SAIT;
 		txAbort(tid, 1);
 		goto cleanup;
@@ -2997,7 +2996,7 @@ static void duplicateIXtree(struct super_block *sb, s64 blkno,
 	/* update the inode map's inode to reflect the extension */
 	ip->i_size += PSIZE;
 	ip->i_blocks += LBLK2PBLK(sb, xlen);
-	rc = txCommit(tid, 1, &ip, COMMIT_FORCE);
+	txCommit(tid, 1, &ip, COMMIT_FORCE);
       cleanup:
 	txEnd(tid);
 	diFreeSpecial(ip);

fs/jfs/jfs_txnmgr.c

@@ -1551,12 +1551,10 @@ int dataLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 void dtLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 	   struct tlock * tlck)
 {
-	struct inode *ip;
 	struct metapage *mp;
 	struct pxd_lock *pxdlock;
 	pxd_t *pxd;
 
-	ip = tlck->ip;
 	mp = tlck->mp;
 
 	/* initialize as REDOPAGE/NOREDOPAGE record format */
@@ -2892,7 +2890,6 @@ void txQuiesce(struct super_block *sb)
 	struct inode *ip;
 	struct jfs_inode_info *jfs_ip;
 	struct jfs_log *log = JFS_SBI(sb)->log;
-	int rc;
 	tid_t tid;
 
 	set_bit(log_QUIESCE, &log->flag);
@@ -2912,7 +2909,7 @@ void txQuiesce(struct super_block *sb)
 		TXN_UNLOCK();
 		tid = txBegin(ip->i_sb, COMMIT_INODE | COMMIT_FORCE);
 		down(&jfs_ip->commit_sem);
-		rc = txCommit(tid, 1, &ip, 0);
+		txCommit(tid, 1, &ip, 0);
 		txEnd(tid);
 		up(&jfs_ip->commit_sem);
 		/*

fs/jfs/jfs_xtree.c

@@ -3268,14 +3268,13 @@ static int xtRelink(tid_t tid, struct inode *ip, xtpage_t * p)
 void xtInitRoot(tid_t tid, struct inode *ip)
 {
 	xtpage_t *p;
-	struct tlock *tlck;
 
 	/*
 	 * acquire a transaction lock on the root
 	 *
 	 * action:
 	 */
-	tlck = txLock(tid, ip, (struct metapage *) &JFS_IP(ip)->bxflag,
+	txLock(tid, ip, (struct metapage *) &JFS_IP(ip)->bxflag,
 		      tlckXTREE | tlckNEW);
 	p = &JFS_IP(ip)->i_xtroot;