linux-kernel - [djwong-xfs:zero-initialize-pmem-5.16 18/28] fs/xfs/libxfs/xfs_fs.h:273:33: warning: conversion from 'long long unsigned int' to 'long unsigned int' changes value from '4294967296' to '0'

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Date:   Thu, 7 Oct 2021 19:34:47 +0800
From:   kernel test robot <lkp@...el.com>
To:     "Darrick J. Wong" <djwong@...nel.org>
Cc:     kbuild-all@...ts.01.org,
        "Darrick J. Wong" <darrick.wong@...cle.com>,
        linux-kernel@...r.kernel.org
Subject: [djwong-xfs:zero-initialize-pmem-5.16 18/28]
 fs/xfs/libxfs/xfs_fs.h:273:33: warning: conversion from 'long long unsigned
 int' to 'long unsigned int' changes value from '4294967296' to '0'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux.git zero-initialize-pmem-5.16
head:   34b80c3d1203abd5fd64242ef25898c7d64166ca
commit: c0ef00d1e835bfd24399aaa069b2b608dd60b485 [18/28] xfs: check absolute maximum nlevels for each btree type
config: sh-buildonly-randconfig-r003-20211007 (attached as .config)
compiler: sh4-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/djwong/xfs-linux.git/commit/?id=c0ef00d1e835bfd24399aaa069b2b608dd60b485
        git remote add djwong-xfs https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux.git
        git fetch --no-tags djwong-xfs zero-initialize-pmem-5.16
        git checkout c0ef00d1e835bfd24399aaa069b2b608dd60b485
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=sh 

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

All warnings (new ones prefixed by >>):

   In file included from fs/xfs/xfs_linux.h:72,
                    from fs/xfs/xfs.h:22,
                    from fs/xfs/libxfs/xfs_ialloc_btree.c:6:
   fs/xfs/libxfs/xfs_ialloc_btree.c: In function 'xfs_inobt_absolute_maxlevels':
>> fs/xfs/libxfs/xfs_fs.h:273:33: warning: conversion from 'long long unsigned int' to 'long unsigned int' changes value from '4294967296' to '0' [-Woverflow]
     273 | #define XFS_MAX_AG_INODES       (XFS_MAX_AG_BYTES / XFS_DINODE_MIN_SIZE)
         |                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   fs/xfs/libxfs/xfs_ialloc_btree.c:552:53: note: in expansion of macro 'XFS_MAX_AG_INODES'
     552 |         return xfs_btree_compute_maxlevels(minrecs, XFS_MAX_AG_INODES);
         |                                                     ^~~~~~~~~~~~~~~~~


vim +273 fs/xfs/libxfs/xfs_fs.h

   264	
   265	/*
   266	 * Limits on sb_agblocks/sb_agblklog -- mkfs won't format AGs smaller than
   267	 * 16MB or larger than 1TB.
   268	 */
   269	#define XFS_MIN_AG_BYTES	(1ULL << 24)	/* 16 MB */
   270	#define XFS_MAX_AG_BYTES	(1ULL << 40)	/* 1 TB */
   271	#define XFS_MAX_AG_BLOCKS	(XFS_MAX_AG_BYTES / XFS_MIN_BLOCKSIZE)
   272	#define XFS_MAX_CRC_AG_BLOCKS	(XFS_MAX_AG_BYTES / XFS_MIN_CRC_BLOCKSIZE)
 > 273	#define XFS_MAX_AG_INODES	(XFS_MAX_AG_BYTES / XFS_DINODE_MIN_SIZE)
   274	

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

Download attachment ".config.gz" of type "application/gzip" (31673 bytes)