SUNRPC: Fix unx_lookup_cred() allocation

Default to the same mempool allocation strategy as for rpc_malloc().
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>

net/sunrpc/auth_unix.c

@@ -40,17 +40,19 @@ unx_destroy(struct rpc_auth *auth)
 /*
  * Lookup AUTH_UNIX creds for current process
  */
-static struct rpc_cred *
-unx_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
+static struct rpc_cred *unx_lookup_cred(struct rpc_auth *auth,
+					struct auth_cred *acred, int flags)
 {
-	gfp_t gfp = GFP_KERNEL;
 	struct rpc_cred *ret;
 
-	if (flags & RPCAUTH_LOOKUP_ASYNC)
-		gfp = GFP_NOWAIT | __GFP_NOWARN;
-	ret = mempool_alloc(unix_pool, gfp);
-	if (!ret)
-		return ERR_PTR(-ENOMEM);
+	ret = kmalloc(sizeof(*ret), rpc_task_gfp_mask());
+	if (!ret) {
+		if (!(flags & RPCAUTH_LOOKUP_ASYNC))
+			return ERR_PTR(-ENOMEM);
+		ret = mempool_alloc(unix_pool, GFP_NOWAIT);
+		if (!ret)
+			return ERR_PTR(-ENOMEM);
+	}
 	rpcauth_init_cred(ret, acred, auth, &unix_credops);
 	ret->cr_flags = 1UL << RPCAUTH_CRED_UPTODATE;
 	return ret;