[jlayton:dir-deleg 32/43] fs/nfsd/nfs4callback.c:900:23: warning: unused variable 'res'

[jlayton:dir-deleg 32/43] fs/nfsd/nfs4callback.c:900:23: warning: unused variable 'res'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux.git dir-deleg
head:   0c6668479bba48114e5031d6fb3db53d80d8d6ad
commit: 118202ef11a34c160a4bb2a9bf78ddf8626b0ed3 [32/43] nfsd: add callback encoding and decoding linkages for CB_NOTIFY
config: i386-buildonly-randconfig-001-20250522 (https://download.01.org/0day-ci/archive/20250522/202505222120.oaQu7cme-lkp@intel.com/config)
compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250522/202505222120.oaQu7cme-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202505222120.oaQu7cme-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> fs/nfsd/nfs4callback.c:900:23: warning: unused variable 'res' [-Wunused-variable]
     900 |         struct CB_NOTIFY4res res;
         |                              ^~~
   1 warning generated.


vim +/res +900 fs/nfsd/nfs4callback.c

   893	
   894	static int nfs4_xdr_dec_cb_notify(struct rpc_rqst *rqstp,
   895					  struct xdr_stream *xdr,
   896					  void *data)
   897	{
   898		struct nfsd4_callback *cb = data;
   899		struct nfs4_cb_compound_hdr hdr;
 > 900		struct CB_NOTIFY4res res;
   901		int status;
   902	
   903		status = decode_cb_compound4res(xdr, &hdr);
   904		if (unlikely(status))
   905			return status;
   906	
   907		status = decode_cb_sequence4res(xdr, cb);
   908		if (unlikely(status || cb->cb_seq_status))
   909			return status;
   910	
   911		return decode_cb_op_status(xdr, OP_CB_NOTIFY, &cb->cb_status);
   912	}
   913	

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