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, 25 insertions, 0 deletions

diff --git a/lib/notifier-error-inject.h b/lib/notifier-error-inject.h
new file mode 100644
index 000000000..fafff5f2a
--- /dev/null
+++ b/lib/notifier-error-inject.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <linux/atomic.h>
+#include <linux/debugfs.h>
+#include <linux/notifier.h>
+
+struct notifier_err_inject_action {
+	unsigned long val;
+	int error;
+	const char *name;
+};
+
+#define NOTIFIER_ERR_INJECT_ACTION(action)	\
+	.name = #action, .val = (action),
+
+struct notifier_err_inject {
+	struct notifier_block nb;
+	struct notifier_err_inject_action actions[];
+	/* The last slot must be terminated with zero sentinel */
+};
+
+extern struct dentry *notifier_err_inject_dir;
+
+extern struct dentry *notifier_err_inject_init(const char *name,
+		struct dentry *parent, struct notifier_err_inject *err_inject,
+		int priority);