linux-kernel - [kbuild] [allisonhenderson-xfs-work:delayed_attrs_v26_extended 17/30] fs/xfs/libxfs/xfs_attr.c:666:46: warning: Expression '(X | 0x8) != 0x0' is always true. [comparisonError]

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Date:   Mon, 24 Jan 2022 15:07:58 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     kbuild@...ts.01.org,
        Allison Henderson <allison.henderson@...cle.com>
Cc:     lkp@...el.com, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, Mark Tinguely <tinguely@....com>,
        Dave Chinner <dchinner@...hat.com>
Subject: [kbuild] [allisonhenderson-xfs-work:delayed_attrs_v26_extended
 17/30] fs/xfs/libxfs/xfs_attr.c:666:46: warning: Expression '(X | 0x8) !=
 0x0' is always true. [comparisonError]

tree:   https://github.com/allisonhenderson/xfs_work.git  delayed_attrs_v26_extended
head:   19459f5cfa422b0a6a9cd3898892e43ecb49f8f3
commit: 721a69ffe0e2561371de01822bef355354eee926 [17/30] xfs: add parent pointer support to attribute code
compiler: sparc64-linux-gcc (GCC) 11.2.0

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


cppcheck possible warnings: (new ones prefixed by >>, may not real problems)

>> fs/xfs/libxfs/xfs_attr.c:666:46: warning: Expression '(X | 0x8) != 0x0' is always true. [comparisonError]
    rsvd = ((args->attr_filter & XFS_ATTR_ROOT) | XFS_ATTR_PARENT) != 0;
                                                ^

vim +666 fs/xfs/libxfs/xfs_attr.c

c5b4ac39a4cb6a fs/xfs/xfs_attr.c        Christoph Hellwig 2014-05-13  653  int
c5b4ac39a4cb6a fs/xfs/xfs_attr.c        Christoph Hellwig 2014-05-13  654  xfs_attr_set(
a25446224353a7 fs/xfs/libxfs/xfs_attr.c Christoph Hellwig 2020-02-26  655  	struct xfs_da_args	*args)
^1da177e4c3f41 fs/xfs/xfs_attr.c        Linus Torvalds    2005-04-16  656  {
a25446224353a7 fs/xfs/libxfs/xfs_attr.c Christoph Hellwig 2020-02-26  657  	struct xfs_inode	*dp = args->dp;
3d3c8b5222b924 fs/xfs/xfs_attr.c        Jie Liu           2013-08-12  658  	struct xfs_mount	*mp = dp->i_mount;
3d3c8b5222b924 fs/xfs/xfs_attr.c        Jie Liu           2013-08-12  659  	struct xfs_trans_res	tres;
721a69ffe0e256 fs/xfs/libxfs/xfs_attr.c Allison Henderson 2021-08-23  660  	bool			rsvd;
4c74a56b9de76b fs/xfs/libxfs/xfs_attr.c Allison Henderson 2018-10-18  661  	int			error, local;
3a19bb147c72d2 fs/xfs/libxfs/xfs_attr.c Chandan Babu R    2021-01-22  662  	int			rmt_blks = 0;
0eb81a5f5c3442 fs/xfs/libxfs/xfs_attr.c Christoph Hellwig 2020-02-26  663  	unsigned int		total;
5fad9cb9d34c53 fs/xfs/libxfs/xfs_attr.c Allison Henderson 2022-01-18  664  	int			delayed = xfs_has_larp(mp);
c5b4ac39a4cb6a fs/xfs/xfs_attr.c        Christoph Hellwig 2014-05-13  665  
721a69ffe0e256 fs/xfs/libxfs/xfs_attr.c Allison Henderson 2021-08-23 @666  	rsvd = ((args->attr_filter & XFS_ATTR_ROOT) | XFS_ATTR_PARENT) != 0;

Anything ORed with XFS_ATTR_PARENT can't be zero.  Parentheses in the
wrong location?

	rsvd = (args->attr_filter & (XFS_ATTR_ROOT | XFS_ATTR_PARENT)) != 0;

721a69ffe0e256 fs/xfs/libxfs/xfs_attr.c Allison Henderson 2021-08-23  667  
75c8c50fa16a23 fs/xfs/libxfs/xfs_attr.c Dave Chinner      2021-08-18  668  	if (xfs_is_shutdown(dp->i_mount))
2451337dd04390 fs/xfs/libxfs/xfs_attr.c Dave Chinner      2014-06-25  669  		return -EIO;
c5b4ac39a4cb6a fs/xfs/xfs_attr.c        Christoph Hellwig 2014-05-13  670  
0eb81a5f5c3442 fs/xfs/libxfs/xfs_attr.c Christoph Hellwig 2020-02-26  671  	error = xfs_qm_dqattach(dp);
0eb81a5f5c3442 fs/xfs/libxfs/xfs_attr.c Christoph Hellwig 2020-02-26  672  	if (error)

---
0-DAY CI Kernel Test Service, Intel Corporation
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