nfsd: do_probe_callback should not clear rpc stats

Now that cb_stats are static (since commit
ff7d9756b501744540be65e172d27ee321d86103)
there's no need to clear them.

Initially I thought it might make sense to do
that every callback probing but since the stats
are per-program and they are shared between possibly
several client callback instances, zeroing them out
seems like the wrong thing to do.

Note that that commit also introduced a bug
since stats.program is also being cleared in the process
and it is not restored after the memset as it used to be.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index ab13e02c56838c89f70c2d67e35d722df3ade1e3..f7c793a5b803e5166d17e3dc8e7fc8672e1003cd 100644 (file)
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -397,9 +397,6 @@ static int do_probe_callback(void *data)
        addr.sin_port = htons(cb->cb_port);
        addr.sin_addr.s_addr = htonl(cb->cb_addr);
 
-       /* Initialize rpc_stat */
-       memset(args.program->stats, 0, sizeof(struct rpc_stat));
-
        /* Create RPC client */
        client = rpc_create(&args);
        if (IS_ERR(client)) {