fs/nfsd/vfs.c:2252:13: sparse: sparse: incorrect type in assignment (different base types)

fs/nfsd/vfs.c:2252:13: sparse: sparse: incorrect type in assignment (different base types)

[kernel test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   805c6d3c19210c90c109107d189744e960eae025
commit: 32119446bb65da559eb6f05236086fe449d2a024 nfsd: define xattr functions to call into their vfs counterparts
date:   2 months ago
config: m68k-randconfig-s032-20200923 (attached as .config)
compiler: m68k-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.2-201-g24bdaac6-dirty
        git checkout 32119446bb65da559eb6f05236086fe449d2a024
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=m68k 

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


sparse warnings: (new ones prefixed by >>)

>> fs/nfsd/vfs.c:2252:13: sparse: sparse: incorrect type in assignment (different base types) @@     expected int err @@     got restricted __be32 @@
>> fs/nfsd/vfs.c:2252:13: sparse:     expected int err
>> fs/nfsd/vfs.c:2252:13: sparse:     got restricted __be32
>> fs/nfsd/vfs.c:2254:24: sparse: sparse: incorrect type in return expression (different base types) @@     expected restricted __be32 @@     got int err @@
>> fs/nfsd/vfs.c:2254:24: sparse:     expected restricted __be32
>> fs/nfsd/vfs.c:2254:24: sparse:     got int err
   fs/nfsd/vfs.c:2276:13: sparse: sparse: incorrect type in assignment (different base types) @@     expected int err @@     got restricted __be32 @@
   fs/nfsd/vfs.c:2276:13: sparse:     expected int err
   fs/nfsd/vfs.c:2276:13: sparse:     got restricted __be32
   fs/nfsd/vfs.c:2278:24: sparse: sparse: incorrect type in return expression (different base types) @@     expected restricted __be32 @@     got int err @@
   fs/nfsd/vfs.c:2278:24: sparse:     expected restricted __be32
   fs/nfsd/vfs.c:2278:24: sparse:     got int err

# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=32119446bb65da559eb6f05236086fe449d2a024
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 32119446bb65da559eb6f05236086fe449d2a024
vim +2252 fs/nfsd/vfs.c

  2238	
  2239	/*
  2240	 * Removexattr and setxattr need to call fh_lock to both lock the inode
  2241	 * and set the change attribute. Since the top-level vfs_removexattr
  2242	 * and vfs_setxattr calls already do their own inode_lock calls, call
  2243	 * the _locked variant. Pass in a NULL pointer for delegated_inode,
  2244	 * and let the client deal with NFS4ERR_DELAY (same as with e.g.
  2245	 * setattr and remove).
  2246	 */
  2247	__be32
  2248	nfsd_removexattr(struct svc_rqst *rqstp, struct svc_fh *fhp, char *name)
  2249	{
  2250		int err, ret;
  2251	
> 2252		err = fh_verify(rqstp, fhp, 0, NFSD_MAY_WRITE);
  2253		if (err)
> 2254			return err;
  2255	
  2256		ret = fh_want_write(fhp);
  2257		if (ret)
  2258			return nfserrno(ret);
  2259	
  2260		fh_lock(fhp);
  2261	
  2262		ret = __vfs_removexattr_locked(fhp->fh_dentry, name, NULL);
  2263	
  2264		fh_unlock(fhp);
  2265		fh_drop_write(fhp);
  2266	
  2267		return nfsd_xattr_errno(ret);
  2268	}
  2269	

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

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