Revert "Merge branch 'dsa-rtnl'"

This reverts commit 965e6b262f, reversing
changes made to 4d98bb0d7e.

tools/testing/selftests/drivers/net/dsa/test_bridge_fdb_stress.sh

@@ -1,47 +0,0 @@
-#!/bin/bash
-# SPDX-License-Identifier: GPL-2.0
-
-# Bridge FDB entries can be offloaded to DSA switches without holding the
-# rtnl_mutex. Traditionally this mutex has conferred drivers implicit
-# serialization, which means their code paths are not well tested in the
-# presence of concurrency.
-# This test creates a background task that stresses the FDB by adding and
-# deleting an entry many times in a row without the rtnl_mutex held.
-# It then tests the driver resistance to concurrency by calling .ndo_fdb_dump
-# (with rtnl_mutex held) from a foreground task.
-# Since either the FDB dump or the additions/removals can fail, but the
-# additions and removals are performed in deferred as opposed to process
-# context, we cannot simply check for user space error codes.
-
-WAIT_TIME=1
-NUM_NETIFS=1
-REQUIRE_JQ="no"
-REQUIRE_MZ="no"
-NETIF_CREATE="no"
-lib_dir=$(dirname $0)/../../../net/forwarding
-source $lib_dir/lib.sh
-
-cleanup() {
-	echo "Cleaning up"
-	kill $pid && wait $pid &> /dev/null
-	ip link del br0
-	echo "Please check kernel log for errors"
-}
-trap 'cleanup' EXIT
-
-eth=${NETIFS[p1]}
-
-ip link del br0 2&>1 >/dev/null || :
-ip link add br0 type bridge && ip link set $eth master br0
-
-(while :; do
-	bridge fdb add 00:01:02:03:04:05 dev $eth master static
-	bridge fdb del 00:01:02:03:04:05 dev $eth master static
-done) &
-pid=$!
-
-for i in $(seq 1 50); do
-	bridge fdb show > /dev/null
-	sleep 3
-	echo "$((${i} * 2))% complete..."
-done