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, 29 insertions, 0 deletions

diff --git a/drivers/greybus/debugfs.c b/drivers/greybus/debugfs.c
new file mode 100644
index 000000000..e102d7bad
--- /dev/null
+++ b/drivers/greybus/debugfs.c
@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Greybus debugfs code
+ *
+ * Copyright 2014 Google Inc.
+ * Copyright 2014 Linaro Ltd.
+ */
+
+#include <linux/debugfs.h>
+#include <linux/greybus.h>
+
+static struct dentry *gb_debug_root;
+
+void __init gb_debugfs_init(void)
+{
+	gb_debug_root = debugfs_create_dir("greybus", NULL);
+}
+
+void gb_debugfs_cleanup(void)
+{
+	debugfs_remove_recursive(gb_debug_root);
+	gb_debug_root = NULL;
+}
+
+struct dentry *gb_debugfs_get(void)
+{
+	return gb_debug_root;
+}
+EXPORT_SYMBOL_GPL(gb_debugfs_get);