[cel:nfsd-xdr-stream 184/222] fs/nfsd/nfsxdr.c:659:40: sparse: sparse: incorrect type in argument 2 (different base types)

[cel:nfsd-xdr-stream 184/222] fs/nfsd/nfsxdr.c:659:40: sparse: sparse: incorrect type in argument 2 (different base types)

[kernel test robot]

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tree:   git://git.linux-nfs.org/projects/cel/cel-2.6.git nfsd-xdr-stream
head:   b7fc29ae80754e7f13221c012a2fd6e0203aa46e
commit: 49763242727b7fceda31964f6e046ea036594249 [184/222] NFSD: Update the NFSv2 READDIR entry encoder to use struct xdr_stream
config: x86_64-randconfig-s021-20201201 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-170-g3bc348f6-dirty
        git remote add cel git://git.linux-nfs.org/projects/cel/cel-2.6.git
        git fetch --no-tags cel nfsd-xdr-stream
        git checkout 49763242727b7fceda31964f6e046ea036594249
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 

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/nfsxdr.c:659:40: sparse: sparse: incorrect type in argument 2 (different base types) @@     expected unsigned int [usertype] n @@     got restricted __be32 [usertype] @@
   fs/nfsd/nfsxdr.c:659:40: sparse:     expected unsigned int [usertype] n
   fs/nfsd/nfsxdr.c:659:40: sparse:     got restricted __be32 [usertype]

vim +659 fs/nfsd/nfsxdr.c

   641	
   642	static int
   643	svcxdr_encode_entry_common(struct nfsd_readdirres *resp, const char *name,
   644				   int namlen, loff_t offset, u64 ino)
   645	{
   646		struct xdr_buf *dirlist = &resp->dirlist;
   647		struct xdr_stream *xdr = &resp->xdr;
   648	
   649		if (xdr_stream_encode_item_present(xdr) < 0)
   650			return 0;
   651		/* fileid */
   652		if (xdr_stream_encode_u32(xdr, (u32)ino) < 0)
   653			return 0;
   654		/* name */
   655		if (xdr_stream_encode_opaque(xdr, name, min(namlen, NFS2_MAXNAMLEN)) < 0)
   656			return 0;
   657		/* cookie */
   658		resp->cookie_offset = dirlist->len;
 > 659		if (xdr_stream_encode_u32(xdr, cpu_to_be32(~0U)) < 0)
   660			return 0;
   661	
   662		return 1;
   663	}
   664	

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

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