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, 32 insertions, 0 deletions

diff --git a/arch/s390/Kconfig.debug b/arch/s390/Kconfig.debug
new file mode 100644
index 000000000..7955d7eee
--- /dev/null
+++ b/arch/s390/Kconfig.debug
@@ -0,0 +1,32 @@
+# SPDX-License-Identifier: GPL-2.0
+
+config EARLY_PRINTK
+	def_bool y
+
+config DEBUG_ENTRY
+	bool "Debug low-level entry code"
+	depends on DEBUG_KERNEL
+	help
+	  This option enables sanity checks in s390 low-level entry code.
+	  Some of these sanity checks may slow down kernel entries and
+	  exits or otherwise impact performance.
+
+	  If unsure, say N.
+
+config STRICT_MM_TYPECHECKS
+	bool "Strict Memory Management Type Checks"
+	depends on DEBUG_KERNEL
+	help
+	  Enable strict type checking for memory management types like pte_t
+	  and pmd_t. This generates slightly worse code and should be used
+	  for debug builds.
+
+	  If unsure, say N.
+
+config CIO_INJECT
+	bool "CIO Inject interfaces"
+	depends on DEBUG_KERNEL && DEBUG_FS
+	help
+	  This option provides a debugging facility to inject certain artificial events
+	  and instruction responses to the CIO layer of Linux kernel. The newly created
+	  debugfs user-interfaces will be at /sys/kernel/debug/s390/cio/*