Re: [PATCH v3] NFSv4.2: Update mode bits after ALLOCATE and DEALLOCATE

[kernel test robot <lkp@xxxxxxxxx>]

Hi Anna,

I love your patch! Perhaps something to improve:

[auto build test WARNING on trondmy-nfs/linux-next]
[also build test WARNING on linus/master v6.0-rc3 next-20220901]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Anna-Schumaker/NFSv4-2-Update-mode-bits-after-ALLOCATE-and-DEALLOCATE/20220902-032035
base:   git://git.linux-nfs.org/projects/trondmy/linux-nfs.git linux-next
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20220902/202209021046.JT3dSTuK-lkp@xxxxxxxxx/config)
compiler: gcc-11 (Debian 11.3.0-5) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/8a722317bde651cf6fa29c7c618ddcce4e52b4e1
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Anna-Schumaker/NFSv4-2-Update-mode-bits-after-ALLOCATE-and-DEALLOCATE/20220902-032035
        git checkout 8a722317bde651cf6fa29c7c618ddcce4e52b4e1
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash fs/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

   fs/nfs/nfs42proc.c: In function '_nfs42_proc_fallocate':
>> fs/nfs/nfs42proc.c:59:22: warning: unused variable 'invalid' [-Wunused-variable]
      59 |         unsigned int invalid = 0;
         |                      ^~~~~~~


vim +/invalid +59 fs/nfs/nfs42proc.c

    43	
    44	static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
    45			struct nfs_lock_context *lock, loff_t offset, loff_t len)
    46	{
    47		struct inode *inode = file_inode(filep);
    48		struct nfs_server *server = NFS_SERVER(inode);
    49		u32 bitmask[NFS_BITMASK_SZ];
    50		struct nfs42_falloc_args args = {
    51			.falloc_fh	= NFS_FH(inode),
    52			.falloc_offset	= offset,
    53			.falloc_length	= len,
    54			.falloc_bitmask	= bitmask,
    55		};
    56		struct nfs42_falloc_res res = {
    57			.falloc_server	= server,
    58		};
  > 59		unsigned int invalid = 0;
    60		int status;
    61	
    62		msg->rpc_argp = &args;
    63		msg->rpc_resp = &res;
    64	
    65		status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context,
    66				lock, FMODE_WRITE);
    67		if (status) {
    68			if (status == -EAGAIN)
    69				status = -NFS4ERR_BAD_STATEID;
    70			return status;
    71		}
    72	
    73		nfs4_bitmask_set(bitmask, server->cache_consistency_bitmask, inode,
    74				 NFS_INO_INVALID_BLOCKS);
    75	
    76		res.falloc_fattr = nfs_alloc_fattr();
    77		if (!res.falloc_fattr)
    78			return -ENOMEM;
    79	
    80		status = nfs4_call_sync(server->client, server, msg,
    81					&args.seq_args, &res.seq_res, 0);
    82		if (status == 0) {
    83			if (nfs_should_remove_suid(inode)) {
    84				spin_lock(&inode->i_lock);
    85				nfs_set_cache_invalid(inode, NFS_INO_INVALID_MODE);
    86				spin_unlock(&inode->i_lock);
    87			}
    88			status = nfs_post_op_update_inode_force_wcc(inode,
    89								    res.falloc_fattr);
    90		}
    91		if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE])
    92			trace_nfs4_fallocate(inode, &args, status);
    93		else
    94			trace_nfs4_deallocate(inode, &args, status);
    95		kfree(res.falloc_fattr);
    96		return status;
    97	}
    98	

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