fs/xfs/xfs_iwalk.c:355:42: warning: variable 'irec' set but not used

[kernel test robot <lkp@intel.com>]

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Hi Darrick,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   42eb8fdac2fc5d62392dcfcf0253753e821a97b0
commit: 27c14b5daa82861220d6fa6e27b51f05f21ffaa7 xfs: ensure inobt record walks always make forward progress
date:   1 year ago
config: h8300-randconfig-r014-20210927 (attached as .config)
compiler: h8300-linux-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=27c14b5daa82861220d6fa6e27b51f05f21ffaa7
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 27c14b5daa82861220d6fa6e27b51f05f21ffaa7
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=h8300 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   fs/xfs/xfs_iwalk.c: In function 'xfs_iwalk_run_callbacks':
>> fs/xfs/xfs_iwalk.c:355:42: warning: variable 'irec' set but not used [-Wunused-but-set-variable]
     355 |         struct xfs_inobt_rec_incore     *irec;
         |                                          ^~~~


vim +/irec +355 fs/xfs/xfs_iwalk.c

a211432c27ffa3 Darrick J. Wong 2019-07-02  336  
a211432c27ffa3 Darrick J. Wong 2019-07-02  337  /*
a211432c27ffa3 Darrick J. Wong 2019-07-02  338   * The inobt record cache is full, so preserve the inobt cursor state and
a211432c27ffa3 Darrick J. Wong 2019-07-02  339   * run callbacks on the cached inobt records.  When we're done, restore the
a211432c27ffa3 Darrick J. Wong 2019-07-02  340   * cursor state to wherever the cursor would have been had the cache not been
a211432c27ffa3 Darrick J. Wong 2019-07-02  341   * full (and therefore we could've just incremented the cursor) if *@has_more
a211432c27ffa3 Darrick J. Wong 2019-07-02  342   * is true.  On exit, *@has_more will indicate whether or not the caller should
a211432c27ffa3 Darrick J. Wong 2019-07-02  343   * try for more inode records.
a211432c27ffa3 Darrick J. Wong 2019-07-02  344   */
a211432c27ffa3 Darrick J. Wong 2019-07-02  345  STATIC int
a211432c27ffa3 Darrick J. Wong 2019-07-02  346  xfs_iwalk_run_callbacks(
a211432c27ffa3 Darrick J. Wong 2019-07-02  347  	struct xfs_iwalk_ag		*iwag,
a211432c27ffa3 Darrick J. Wong 2019-07-02  348  	xfs_agnumber_t			agno,
a211432c27ffa3 Darrick J. Wong 2019-07-02  349  	struct xfs_btree_cur		**curpp,
a211432c27ffa3 Darrick J. Wong 2019-07-02  350  	struct xfs_buf			**agi_bpp,
a211432c27ffa3 Darrick J. Wong 2019-07-02  351  	int				*has_more)
a211432c27ffa3 Darrick J. Wong 2019-07-02  352  {
a211432c27ffa3 Darrick J. Wong 2019-07-02  353  	struct xfs_mount		*mp = iwag->mp;
a211432c27ffa3 Darrick J. Wong 2019-07-02  354  	struct xfs_trans		*tp = iwag->tp;
a211432c27ffa3 Darrick J. Wong 2019-07-02 @355  	struct xfs_inobt_rec_incore	*irec;
27c14b5daa8286 Darrick J. Wong 2020-11-14  356  	xfs_agino_t			next_agino;
a211432c27ffa3 Darrick J. Wong 2019-07-02  357  	int				error;
a211432c27ffa3 Darrick J. Wong 2019-07-02  358  
27c14b5daa8286 Darrick J. Wong 2020-11-14  359  	next_agino = XFS_INO_TO_AGINO(mp, iwag->lastino) + 1;
27c14b5daa8286 Darrick J. Wong 2020-11-14  360  
a211432c27ffa3 Darrick J. Wong 2019-07-02  361  	ASSERT(iwag->nr_recs > 0);
a211432c27ffa3 Darrick J. Wong 2019-07-02  362  
a211432c27ffa3 Darrick J. Wong 2019-07-02  363  	/* Delete cursor but remember the last record we cached... */
a211432c27ffa3 Darrick J. Wong 2019-07-02  364  	xfs_iwalk_del_inobt(tp, curpp, agi_bpp, 0);
a211432c27ffa3 Darrick J. Wong 2019-07-02  365  	irec = &iwag->recs[iwag->nr_recs - 1];
27c14b5daa8286 Darrick J. Wong 2020-11-14  366  	ASSERT(next_agino == irec->ir_startino + XFS_INODES_PER_CHUNK);
a211432c27ffa3 Darrick J. Wong 2019-07-02  367  
a211432c27ffa3 Darrick J. Wong 2019-07-02  368  	error = xfs_iwalk_ag_recs(iwag);
a211432c27ffa3 Darrick J. Wong 2019-07-02  369  	if (error)
a211432c27ffa3 Darrick J. Wong 2019-07-02  370  		return error;
a211432c27ffa3 Darrick J. Wong 2019-07-02  371  
a211432c27ffa3 Darrick J. Wong 2019-07-02  372  	/* ...empty the cache... */
a211432c27ffa3 Darrick J. Wong 2019-07-02  373  	iwag->nr_recs = 0;
a211432c27ffa3 Darrick J. Wong 2019-07-02  374  
a211432c27ffa3 Darrick J. Wong 2019-07-02  375  	if (!has_more)
a211432c27ffa3 Darrick J. Wong 2019-07-02  376  		return 0;
a211432c27ffa3 Darrick J. Wong 2019-07-02  377  
a211432c27ffa3 Darrick J. Wong 2019-07-02  378  	/* ...and recreate the cursor just past where we left off. */
a211432c27ffa3 Darrick J. Wong 2019-07-02  379  	error = xfs_inobt_cur(mp, tp, agno, XFS_BTNUM_INO, curpp, agi_bpp);
a211432c27ffa3 Darrick J. Wong 2019-07-02  380  	if (error)
a211432c27ffa3 Darrick J. Wong 2019-07-02  381  		return error;
a211432c27ffa3 Darrick J. Wong 2019-07-02  382  
27c14b5daa8286 Darrick J. Wong 2020-11-14  383  	return xfs_inobt_lookup(*curpp, next_agino, XFS_LOOKUP_GE, has_more);
a211432c27ffa3 Darrick J. Wong 2019-07-02  384  }
a211432c27ffa3 Darrick J. Wong 2019-07-02  385  

:::::: The code at line 355 was first introduced by commit
:::::: a211432c27ffa32d9978f6c18f5af0c3f8ad2ad1 xfs: create simplified inode walk function

:::::: TO: Darrick J. Wong <darrick.wong@oracle.com>
:::::: CC: Darrick J. Wong <darrick.wong@oracle.com>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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