nfsd: remove unused get_new_stid()

get_new_stid() is no longer used since commit 3abdb607125 ("nfsd4:
simplify idr allocation").  Remove it.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/nfsd/nfs4state.c

@@ -230,37 +230,6 @@ static void nfs4_file_put_access(struct nfs4_file *fp, int oflag)
 		__nfs4_file_put_access(fp, oflag);
 }
 
-static inline int get_new_stid(struct nfs4_stid *stid)
-{
-	static int min_stateid = 0;
-	struct idr *stateids = &stid->sc_client->cl_stateids;
-	int new_stid;
-	int error;
-
-	error = idr_get_new_above(stateids, stid, min_stateid, &new_stid);
-	/*
-	 * Note: the necessary preallocation was done in
-	 * nfs4_alloc_stateid().  The idr code caps the number of
-	 * preallocations that can exist at a time, but the state lock
-	 * prevents anyone from using ours before we get here:
-	 */
-	WARN_ON_ONCE(error);
-	/*
-	 * It shouldn't be a problem to reuse an opaque stateid value.
-	 * I don't think it is for 4.1.  But with 4.0 I worry that, for
-	 * example, a stray write retransmission could be accepted by
-	 * the server when it should have been rejected.  Therefore,
-	 * adopt a trick from the sctp code to attempt to maximize the
-	 * amount of time until an id is reused, by ensuring they always
-	 * "increase" (mod INT_MAX):
-	 */
-
-	min_stateid = new_stid+1;
-	if (min_stateid == INT_MAX)
-		min_stateid = 0;
-	return new_stid;
-}
-
 static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct
 kmem_cache *slab)
 {