xfs: fix variable set but not used warnings

GCC 4.6 now warnings about variables set but not used. Fix the trivially
fixable warnings of this sort.

Signed-off-by: Christoph Hellwig <[e-mail]>
Signed-off-by: Alex Elder <[e-mail]>

fs/xfs/linux-2.6/xfs_buf.c

···
 	size_t			nbytes, offset;
 	gfp_t			gfp_mask = xb_to_gfp(flags);
 	unsigned short		page_count, i;
-	pgoff_t			first;
 	xfs_off_t		end;
 	int			error;
 
···
 		return error;
 
 	offset = bp->b_offset;
-	first = bp->b_file_offset >> PAGE_SHIFT;
 	bp->b_flags |= _XBF_PAGES;
 
 	for (i = 0; i < bp->b_page_count; i++) {

fs/xfs/quota/xfs_qm.c

···
 	struct xfs_quotainfo	*q = mp->m_quotainfo;
 	int			recl;
 	struct xfs_dquot	*dqp;
-	int			niters;
 	int			error;
 
 	if (!q)
 		return 0;
-	niters = 0;
 again:
 	mutex_lock(&q->qi_dqlist_lock);
 	list_for_each_entry(dqp, &q->qi_dqlist, q_mplist) {
···
 {
 	xfs_buf_t	*bp;
 	int		error;
-	int		notcommitted;
-	int		incr;
 	int		type;
 
 	ASSERT(blkcnt > 0);
-	notcommitted = 0;
-	incr = (blkcnt > XFS_QM_MAX_DQCLUSTER_LOGSZ) ?
-		XFS_QM_MAX_DQCLUSTER_LOGSZ : blkcnt;
 	type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER :
 		(flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP);
 	error = 0;

fs/xfs/quota/xfs_qm.h

···
  * block in the dquot/xqm code.
  */
 #define XFS_DQUOT_CLUSTER_SIZE_FSB	(xfs_filblks_t)1
-/*
- * When doing a quotacheck, we log dquot clusters of this many FSBs at most
- * in a single transaction. We don't want to ask for too huge a log reservation.
- */
-#define XFS_QM_MAX_DQCLUSTER_LOGSZ	3
 
 typedef xfs_dqhash_t	xfs_dqlist_t;
 

fs/xfs/quota/xfs_qm_syscalls.c

···
 {
 	int		error;
 	uint		qf;
-	uint		accflags;
 	__int64_t	sbflags;
 
 	flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
 	/*
 	 * Switching on quota accounting must be done at mount time.
 	 */
-	accflags = flags & XFS_ALL_QUOTA_ACCT;
 	flags &= ~(XFS_ALL_QUOTA_ACCT);
 
 	sbflags = 0;

fs/xfs/xfs_itable.c

···
 	xfs_agi_t		*agi;	/* agi header data */
 	xfs_agino_t		agino;	/* inode # in allocation group */
 	xfs_agnumber_t		agno;	/* allocation group number */
-	xfs_daddr_t		bno;	/* inode cluster start daddr */
 	int			chunkidx; /* current index into inode chunk */
 	int			clustidx; /* current index into inode cluster */
 	xfs_btree_cur_t		*cur;	/* btree cursor for ialloc btree */
···
 						 mp->m_sb.sb_inopblog);
 				}
 				ino = XFS_AGINO_TO_INO(mp, agno, agino);
-				bno = XFS_AGB_TO_DADDR(mp, agno, agbno);
 				/*
 				 * Skip if this inode is free.
 				 */