workqueue: skip the node_nr_active update for non-unbound workqueuesgrafted

apply_wqattrs_commit() updates node_nr_active->max unconditionally.
wq->node_nr_active[] is only allocated for unbound workqueues, so guard
the call before per-cpu workqueues start using this path.

No functional change: only unbound workqueues reach apply_wqattrs_*()
today.

Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Tejun Heo <tj@kernel.org>

1 files changed, 12 insertions, 0 deletions

diff --git a/net/batman-adv/version.c b/net/batman-adv/version.c
new file mode 100644
index 000000000..2b8006fe8
--- /dev/null
+++ b/net/batman-adv/version.c
@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <generated/utsrelease.h>
+#include <linux/module.h>
+
+/* WARNING userspace tools like batctl were relying on
+ * /sys/module/batman_adv/version to check if the module was loaded. If it
+ * isn't present, they usually error out before finishing setup of the batadv
+ * interface. It should be kept until it is unlikely that there are active
+ * installations of these "broken" versions of these tools with recent kernels.
+ */
+MODULE_VERSION(UTS_RELEASE);